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Sample records for antoni picard andreas

  1. An Apology for Antony

    DEFF Research Database (Denmark)

    Kluge, Sofie

    2008-01-01

      Taking off from a consideration of Antony and Cleopatra's intermingling of pathetic and moral tragedy, the analysis proposed in the present essay demonstrates how the play's peculiar combination of morality and pathos results in a dialectical critique of both concepts of the tragic. Shakespeare...... of the great Mark Antony's downfall through moral corruption - that Shakespeare inherited from Roman historiography through Plutarch's Life of Antony, Medieval historiography, and Renaissance emblematics. In contrast to the recent critical negligence of the moral aspect of the play, as well as the overemphasis...

  2. Davis, Dr Trupapur Antony

    Indian Academy of Sciences (India)

    Home; Fellowship. Fellow Profile. Elected: 1979 Section: Plant Sciences. Davis, Dr Trupapur Antony Ph.D. (ISI). Date of birth: 9 February 1923. Date of death: 10 November 1989. Specialization: Plant Physiology. YouTube; Twitter; Facebook; Blog ...

  3. Cheetham, Prof. Antony Kevin

    Indian Academy of Sciences (India)

    Antony Kevin FRS. Date of birth: 16 November 1946. Address: Dept. of Materials Science &, Metallurgy, University of Cambridge, 27, Charles Babbage Road, Cambridge CB3 0FS, uk. Contact: Office: (+44-1223) 74 6733. Fax: (+44-1223) 33 4567. Email: akc30@cam.ac.uk. YouTube; Twitter; Facebook; Blog ...

  4. Antoni Pous, poeta i traductor

    OpenAIRE

    Farrés Puntí, Ramon

    2002-01-01

    Consultable des del TDX Títol obtingut de la portada digitalitzada Antoni Pous, poeta i traductor és un estudi monogràfic de la figura d'Antoni Pous i Argila (Manlleu, 1932 - Barcelona, 1976), activista cultural i home de lletres que va destacar de molt jove, en la immediata postguerra, com a poeta de gran talent; que als anys seixanta va dur a terme una tasca cultural i pedagògica de gran transcendència a Igualada, amb la fundació del grup Lacetània i la creació de la revista Textos; q...

  5. Andrea Cambini

    DEFF Research Database (Denmark)

    Lausten, Pia Schwarz

    2014-01-01

    Andrea Cambinis biografi (1445-1527) samt beskrivelse og analyse af værket 'Della origine de’ Turchi et imperio delli Ottomanni' (1529).......Andrea Cambinis biografi (1445-1527) samt beskrivelse og analyse af værket 'Della origine de’ Turchi et imperio delli Ottomanni' (1529)....

  6. Stray light in Picard telescope

    Science.gov (United States)

    Etcheto, Pierre; Macaire, Anne

    2017-11-01

    The PICARD space borne instrument observes the Sun from far UV to visible wavelengths. Very high geometrical and radiometric accuracy is required to measure the Sun's local diameter. Thus this instrument is very sensitive to stray light. Multiple reflections between the detector, the mirrors and the filters have been modelled with ASAP 6. They are not very critical for a point source, but for a broad source they add a notable contribution, biasing the edge of the Sun image. Near specular scatter from optics also enlarges the instrumental response, especially at short wavelengths. Scatter from baffles and structures is less critical, but the later need a careful design. To fulfil the mission, stay light shall be predicted very accurately, based on measured data, then taken into account in the image processing. Accuracy depends on the model sampling, the reflectivity and contamination of optics, and the misalignments of the filter wheels.

  7. Hodge Numbers from Picard-Fuchs Equations

    Science.gov (United States)

    Doran, Charles F.; Harder, Andrew; Thompson, Alan

    2017-06-01

    Given a variation of Hodge structure over P^1 with Hodge numbers (1,1,\\dots,1), we show how to compute the degrees of the Deligne extension of its Hodge bundles, following Eskin-Kontsevich-Möller-Zorich, by using the local exponents of the corresponding Picard-Fuchs equation. This allows us to compute the Hodge numbers of Zucker's Hodge structure on the corresponding parabolic cohomology groups. We also apply this to families of elliptic curves, K3 surfaces and Calabi-Yau threefolds.

  8. Deformations of the generalised Picard bundle

    International Nuclear Information System (INIS)

    Biswas, I.; Brambila-Paz, L.; Newstead, P.E.

    2004-08-01

    Let X be a nonsingular algebraic curve of genus g ≥ 3, and let Mξ denote the moduli space of stable vector bundles of rank n ≥ 2 and degree d with fixed determinant ξ over X such that n and d are coprime. We assume that if g = 3 then n ≥ 4 and if g = 4 then n ≥ 3, and suppose further that n 0 , d 0 are integers such that n 0 ≥ 1 and nd 0 + n 0 d > nn 0 (2g - 2). Let E be a semistable vector bundle over X of rank n 0 and degree d 0 . The generalised Picard bundle W ξ (E) is by definition the vector bundle over M ξ defined by the direct image p M ξ *(U ξ x p X * E) where U ξ is a universal vector bundle over X x M ξ . We obtain an inversion formula allowing us to recover E from W ξ (E) and show that the space of infinitesimal deformations of W ξ (E) is isomorphic to H 1 (X, End(E)). This construction gives a locally complete family of vector bundles over M ξ parametrised by the moduli space M(n 0 ,d 0 ) of stable bundles of rank n 0 and degree d 0 over X. If (n 0 ,d 0 ) = 1 and W ξ (E) is stable for all E is an element of M(n 0 ,d 0 ), the construction determines an isomorphism from M(n 0 ,d 0 ) to a connected component M 0 of a moduli space of stable sheaves over M ξ . This applies in particular when n 0 = 1, in which case M 0 is isomorphic to the Jacobian J of X as a polarised variety. The paper as a whole is a generalisation of results of Kempf and Mukai on Picard bundles over J, and is also related to a paper of Tyurin on the geometry of moduli of vector bundles. (author)

  9. Stability of Picard Bundle Over Moduli Space of Stable Vector ...

    Indian Academy of Sciences (India)

    Abstract. Answering a question of [BV] it is proved that the Picard bundle on the moduli space of stable vector bundles of rank two, on a Riemann surface of genus at least three, with fixed determinant of odd degree is stable.

  10. On the Picard group of a compact flat projective variety

    NARCIS (Netherlands)

    Michelacakis, NJ

    1996-01-01

    In this note, we describe the Picard group of the class of compact, smooth, flat, projective varieties. In view of Charlap's work and Johnson's characterization, we construct line bundles over such manifolds as the holonomy-invariant elements of the Neron-Severi group of a projective flat torus

  11. Weak point property and sections of Picard bundles on a ...

    Indian Academy of Sciences (India)

    Contemp. Math., 465 (2008) (Providence, RI: Amer. Math. Soc.) pp. 45–50. [7] Ein L and Lazarsfeld R, Stability and restrictions of Picard bundles with an application to the normal bundles of elliptic curves, in: Complex projective geometry (ed) Ellingsrud,. Peskine et al LMS 179 (1992) (Cambridge University Press). [8] Fulton ...

  12. Environmental Project of I.E.S. Antoni Maura

    Science.gov (United States)

    Crespi Salom, Pere

    2010-05-01

    Environmental Project of I.E.S. Antoni Maura Author(s): Pere Crespí i Salom Teacher of Department of Biology and Geology and Environmental Coordinator (2009-2010) from I.E.S. Antoni Maura . Mallorca. Illes Balears. Spain Teachers participating in the project : Myriam Fuentes Milani, Olga Ballester Nebot, Antoni Salom Ruiz, Julio René Loayza Casanova, Puy Aguirre Rémirez, Yolanda Martínez Laserna, Jaume Puppo Lama, Carme Arrom , Dolors Aguiló Segura, Marga Ordinas Boter, Angel Fernàndez Albertí , Immaculada Suau López, Antònia Florit Torrandell, Isabel Mateu Arcos, Román Piña Valls i Pere Crespí Salom. Our institute takes part since 2004 in adapting environmentally the schools in the Balearics which consists of developing activities which aim is that both teachers and students acquire habits so as to apply to their ordinary lives though different participative commissions ( 10-15 teachers): 1st commission: recycling and reusing materials. Enough bins in the classrooms and floors: yellow for plastic, blue for paper, and green for the other. We tend to use recycled materials in different celebrations such as Carnival, Christmas, Saint Jordi and Environmental day. We also organise workshops for the teachers to develop afterwards with the students and nature of environmental exposures. 2nd commission: Scatter information ( MonMaura, Maurifull, Green window and website).Throughout different means we inform the teachers and students about all the school activities and where to consult.( www.iesantonimaura.net, Playful area , environmental project ). 3rd commission: Reusing text books.( there is a students service of borrowing books and giving them back at the end of the school year if the book is in good use.) 4th commission: Improving the school surroundings, the back garden and garden with native plants. Department of Biology and Geology is responsible for caring for an organic garden and in turn improve the center's garden with native plants within the

  13. New space value of the solar oblateness obtained with PICARD

    Energy Technology Data Exchange (ETDEWEB)

    Irbah, Abdanour; Meftah, Mustapha; Hauchecorne, Alain; Bocquier, Maxime; Cisse, E. Momar [Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), CNRS: UMR 8190-Université Paris VI-Pierre et Marie Curie-Université de Versailles Saint-Quentin-en-Yvelines-INSU, F-78280, Guyancourt (France); Djafer, Djelloul [Unité de Recherche Appliquée en Energies Renouvelables, URAER, Centre de Développement des Energies Renouvelables, CDER, 47133, Ghardaïa (Algeria); Corbard, Thierry, E-mail: Abdenour.Irbah@latmos.ipsl.fr [Laboratoire Lagrange, UMR7293, Université de Nice Sophia-Antipolis, CNRS, Observatoire de la Côte d' Azur, Bd. de l' Observatoire, F-06304 Nice (France)

    2014-04-20

    The PICARD spacecraft was launched on 2010 June 15 with the scientific objective of studying the geometry of the Sun. It is difficult to measure solar oblateness because images are affected by optical distortion. Rolling the satellite, as done in previous space missions, determines the contribution of the telescope by assuming that the geometry of the Sun is constant during the observations. The optical response of the telescope is considered to be time-invariant during the roll operations. This is not the case for PICARD because an orbital signature is clearly observed in the solar radius computed from its images. We take this effect into account and provide the new space value of solar oblateness from PICARD images recorded in the solar continuum at 535.7 nm on 2011 July 4-5. The equator-pole radius difference is 8.4 ± 0.5 mas, which corresponds to an absolute radius difference of 6.1 km. This coincides with the mean value of all solar oblateness measurements obtained during the last two decades from the ground, balloons, and space. It is also consistent with values determined from models using helioseismology data.

  14. The space instrument SOVAP of the PICARD mission

    Science.gov (United States)

    Conscience, C.; Meftah, M.; Chevalier, A.; Dewitte, S.; Crommelynck, D.,

    2011-09-01

    PICARD is a Satellite dedicated to the simultaneous measurement of the absolute total and spectral solar irradiance, the diameter and solar shape and the Sun's interior probed by helioseismology method. Its objectives are the study of the origin of the solar variability and the study of the relations between the Sun and the Earth's climate. PICARD was launched on June 15, 2010. The Satellite was placed into the heliosynchronous orbit of 735 km with inclination of 98.28 degrees. The payload consists in two absolute radiometers measuring the TSI (Total Solar Irradiance) and an imaging telescope to determine the solar diameter, the limb shape and asphericity. SOVAP (SOlar VAriability Picard) is an experiment developed by the Belgian STCE (Solar Terrestrial Center of Excellence) with a contribution of the CNRS (Centre National de la Recherche Scientifique) composed of an absolute radiometer provided by the RMIB (Royal Meteorological Institute of Belgium) to measure the TSI and a bolometer provided by the ROB (Royal Observatory of Belgium). The continuous observation of the solar irradiance at the highest possible precision and accuracy is an important objective of the Earth climate change. This requires: high quality metrology in the space environment. In this article, we describe the SOVAP instrument, its performances and uncertainties on the measurements of the TSI.

  15. Picard-Fuchs equations of dimensionally regulated Feynman integrals

    International Nuclear Information System (INIS)

    Zayadeh, Raphael

    2013-12-01

    This thesis is devoted to studying differential equations of Feynman integrals. A Feynman integral depends on a dimension D. For integer values of D it can be written as a projective integral, which is called the Feynman parameter prescription. A major complication arises from the fact that for some values of D the integral can diverge. This problem is solved within dimensional regularization by continuing the integral as a meromorphic function on the complex plane and replacing the ill-defined quantity by a Laurent series in a dimensional regularization parameter. All terms in such a Laurent expansion are periods in the sense of Kontsevich and Zagier. We describe a new method to compute differential equations of Feynman integrals. So far, the standard has been to use integration-by-parts (IBP) identities to obtain coupled systems of linear differential equations for the master integrals. Our method is based on the theory of Picard-Fuchs equations. In the case we are interested in, that of projective and quasiprojective families, a Picard-Fuchs equation can be computed by means of the Griffiths-Dwork reduction. We describe a method that is designed for fixed integer dimension. After a suitable integer shift of dimension we obtain a period of a family of hypersurfaces, hence a Picard-Fuchs equation. This equation is inhomogeneous because the domain of integration has a boundary and we only obtain a relative cycle. As a second step we shift back the dimension using Tarasov's generalized dimensional recurrence relations. Furthermore, we describe a method to directly compute the differential equation for general D without shifting the dimension. This is based on the Griffiths-Dwork reduction. The success of this method depends on the ability to solve large systems of linear equations. We give examples of two and three-loop graphs. Tarasov classifies two-loop two-point functions and we give differential equations for these. For us the most interesting example is the two

  16. Gravitational decoupling and the Picard-Lefschetz approach

    Science.gov (United States)

    Brown, Jon; Cole, Alex; Shiu, Gary; Cottrell, William

    2018-01-01

    In this work, we consider tunneling between nonmetastable states in gravitational theories. Such processes arise in various contexts, e.g., in inflationary scenarios where the inflaton potential involves multiple fields or multiple branches. They are also relevant for bubble wall nucleation in some cosmological settings. However, we show that the transition amplitudes computed using the Euclidean method generally do not approach the corresponding field theory limit as Mp→∞ . This implies that in the Euclidean framework, there is no systematic expansion in powers of GN for such processes. Such considerations also carry over directly to no-boundary scenarios involving Hawking-Turok instantons. In this note, we illustrate this failure of decoupling in the Euclidean approach with a simple model of axion monodromy and then argue that the situation can be remedied with a Lorentzian prescription such as the Picard-Lefschetz theory. As a proof of concept, we illustrate with a simple model how tunneling transition amplitudes can be calculated using the Picard-Lefschetz approach.

  17. Picard-Fuchs uniformization and modularity of the mirror map

    International Nuclear Information System (INIS)

    Doran, C.F.

    2000-01-01

    Arithmetic properties of mirror symmetry (type IIA-IIB string duality) are studied. We give criteria for the mirror map q-series of certain families of Calabi-Yau manifolds to be automorphic functions. For families of elliptic curves and lattice polarized K3 surfaces with surjective period mappings, global Torelli theorems allow one to present these criteria in terms of the ramification behavior of natural algebraic invariants - the functional and generalized functional invariants respectively. In particular, when applied to one parameter families of rank 19 lattice polarized K3 surfaces, our criterion demystifies the mirror-Moonshine phenomenon of Lian and Yau and highlights its non-monstrous nature. The lack of global Torelli theorems and presence of instanton corrections makes Calabi-Yau threefold families more complicated. Via the constraints of special geometry, the Picard-Fuchs equations for one parameter families of Calabi-Yau threefolds imply a differential equation criterion for automorphicity of the mirror map in terms of the Yukawa coupling. In the absence of instanton corrections, the projective periods map to a twisted cubic space curve. A hierarchy of ''algebraic'' instanton corrections correlated with the differential Galois group of the Picard-Fuchs equation is proposed. (orig.)

  18. La Biblioteca de la Fundació Antoni Tàpies: la otra historia del Arte

    Directory of Open Access Journals (Sweden)

    Domènech, Glòria

    2001-07-01

    Full Text Available La Biblioteca de la Fundació Antoni Tàpies se inauguró en junio de 1990. Está ubicada en el edificio de la antigua Editorial Montaner i Simón, obra proyectada en 1879 por el arquitecto modernista Lluís Domènech i Montaner. La biblioteca está especializada en arte moderno y contemporáneo e incluye secciones de arquitectura, artes decorativas, diseño, fotografía, cine y vídeo así como el más extenso archivo sobre la obra de Antoni Tàpies. Su fondo inicial se componía de unos 5.000 volúmenes procedentes de la donación dla biblioteca particular de Antoni Tàpies.

  19. Antoni Quintana-Mari (1907-1998): A Pioneer of the Use of History of Science in Science Education

    Science.gov (United States)

    Roca-Rosell, Antoni; Grapi-Vilumara, Pere

    2010-01-01

    In the early 1930s, the young Antoni Quintana-Mari undertook some research on Antoni de Marti i Franques, one of the most prominent Catalan scientists of the Enlightenment. This scientist worked in Tarragona, where Quintana-Mari lived. Quintana-Mari learnt about Marti i Franques from Josep Estalella, his teacher of physics and chemistry at the…

  20. Antony van Leeuwenhoek's microscopes and other scientific instruments: new information from the Delft archives

    NARCIS (Netherlands)

    Zuidervaart, Huib J.

    2016-01-01

    This paper discusses the scientific instruments made and used by the microscopist Antony van Leeuwenhoek (1632–1723). The immediate cause of our study was the discovery of an overlooked document from the Delft archive: an inventory of the possessions that were left in 1745 after the death of

  1. [Andreas Vesalius and surgery].

    Science.gov (United States)

    Van Hee, R

    1993-01-01

    By publishing De Humani Corporis Fabrica Libri Septem in 1543, Andries van Wesel (1514-1564) gave surgical science an immense impulse. The revolutionary renovation in the knowledge of man's anatomical structure changed slowly and progressively into topographical and physiological understanding of surgical diseases. At the same time, this made better aimed and more secure operations possible. Apart from the importance of this anatomical publication, Andreas Vesalius also won his spurs as a surgeon. He taught surgery in Padua for many years. He was appointed court physician and surgeon at the Habsburg Court of Charles V and Philip II. He personally performed lots of operations known at the time as major ones. He not only quickly adopted the surgical innovations of his fellow-surgeon Ambroise Paré, but he even performed operations that had been forgotten during several centuries, among which thoracocentesis for pleural empyema. His clinical perspicacity in discovering the indication for some operations was staggering and was appreciated by all great monarchs of Europe in the 16th century. In his several consilia, numerous pieces of advice were given for the treatment of surgical patients. The surgical practice which Vesalius had in Brussels for many years, consequently became most successful. Many publications by Vesalius about surgery and blood-letting are well-known. His Chirurgia magna in septem Libros digesta still remains controversial; these books were published by Prospero Borgarruccio (1560) in 1568 by the Venetian editor Valgrisi. This book gives an excellent survey of surgical pathology as it was taught and treated in the 16th century. The scientific method that Vesalius used, not only in his anatomical studies but also in his surgical practice, deserves not only our full appraisal but should still be studied in our own time.

  2. Super Picard-Fuchs equation and monodromies for supermanifolds

    International Nuclear Information System (INIS)

    Kaura, Payal; Misra, Aalok; Shukla, Pramod

    2007-01-01

    Following, Aganagic and Vafa (e-print hep-th/0403192) and Hori and Vafa (e-print hep-th/0002222), we discuss the Picard-Fuchs equation for the super Landau-Ginsburg mirror to the super Calabi-Yau in WCP (3vertical bar2) [1,1,1,3 vertical bar 1,5] (using techniques of Greene and Lazaroiu [Nucl. Phys. B 604, 181 (2001), e-print hep-th/0001025] and Misra [Fortschr. Phys. 52, 831 (2004), e-print hep-th/0311186]), Meijer basis of solutions, and monodromies (at 0,1 and ∞) in the large and small complex structure limits, as well as obtain the mirror hypersurface, which in the large Kaehler limit turns out to be either a bidegree-(6,6) hypersurface in WCP (3|1) [1,1,1,2]xWCP (1vertical bar1) [1,1 vertical bar 6] or a (Z 2 singular) bidegree-(6,12) hypersurface in WCP (3vertical bar1) [1,1,2,6 vertical bar 6]xWCP (1vertical bar1) [1,1 vertical bar 6

  3. Commissioning of the cryogenic safety test facility PICARD

    Science.gov (United States)

    Heidt, C.; Schön, H.; Stamm, M.; Grohmann, S.

    2015-12-01

    The sizing of cryogenic safety relief devices requires detailed knowledge on the evolution of the pressure increase in cryostats following hazardous incidents such as the venting of the insulating vacuum with atmospheric air. Based on typical design and operating conditions in liquid helium cryostats, the new test facility PICARD, which stands for Pressure Increase in Cryostats and Analysis of Relief Devices, has been constructed. The vacuum-insulated test stand has a cryogenic liquid volume of 100 liters and a nominal design pressure of 16 bar(g). This allows a broad range of experimental conditions with cryogenic fluids. In case of helium, mass flow rates through safety valves and rupture disks up to about 4kg/s can be measured. Beside flow rate measurements under various conditions (venting diameter, insulation, working fluid, liquid level, set pressure), the test stand will be used for studies on the impact of two-phase flow and for the measurement of flow coefficients of safety devices at low temperature. This paper describes the operating range, layout and instrumentation of the test stand and presents the status of the commissioning phase.

  4. Bio-Inspired Design Approach Analysis: A Case Study of Antoni Gaudi and Santiago Calatrava

    OpenAIRE

    Marzieh Imani

    2017-01-01

    Antoni Gaudi and Santiago Calatrava have reputation for designing bio-inspired creative and technical buildings. Even though they have followed different independent approaches towards design, the source of bio-inspiration seems to be common. Taking a closer look at their projects reveals that Calatrava has been influenced by Gaudi in terms of interpreting nature and applying natural principles into the design process. This research firstly discusses the dialogue between Biomimicry and archit...

  5. Update: San Andreas Fault experiment

    Science.gov (United States)

    Christodoulidis, D. C.; Smith, D. E.

    1984-01-01

    Satellite laser ranging techniques are used to monitor the broad motion of the tectonic plates comprising the San Andreas Fault System. The San Andreas Fault Experiment, (SAFE), has progressed through the upgrades made to laser system hardware and an improvement in the modeling capabilities of the spaceborne laser targets. Of special note is the launch of the Laser Geodynamic Satellite, LAGEOS spacecraft, NASA's only completely dedicated laser satellite in 1976. The results of plate motion projected into this 896 km measured line over the past eleven years are summarized and intercompared.

  6. The Picard group of the moduli space of r-Spin Riemann surfaces

    DEFF Research Database (Denmark)

    Randal-Williams, Oscar

    2012-01-01

    An r-Spin Riemann surface is a Riemann surface equipped with a choice of rth root of the (co)tangent bundle. We give a careful construction of the moduli space (orbifold) of r-Spin Riemann surfaces, and explain how to establish a Madsen–Weiss theorem for it. This allows us to prove the “Mumford...... conjecture” for these moduli spaces, but more interestingly allows us to compute their algebraic Picard groups (for g≥10, or g≥9 in the 2-Spin case). We give a complete description of these Picard groups, in terms of explicitly constructed line bundles....

  7. Q-factorial Gorenstein toric Fano varieties with large Picard number

    DEFF Research Database (Denmark)

    Nill, Benjamin; Øbro, Mikkel

    2010-01-01

    In dimension $d$, ${\\boldsymbol Q}$-factorial Gorenstein toric Fano varieties with Picard number $\\rho_X$ correspond to simplicial reflexive polytopes with $\\rho_X + d$ vertices. Casagrande showed that any $d$-dimensional simplicial reflexive polytope has at most $3 d$ and $3d-1$ vertices if $d...... having $3d-1$ vertices, corresponding to $d$-dimensional ${\\boldsymbol Q}$-factorial Gorenstein toric Fano varieties with Picard number $2d-1$. For $d$ even, there exist three such varieties, with two being singular, while for $d > 1$ odd there exist precisely two, both being nonsingular toric fiber...

  8. Une mission astronomique de Jean Picard: Le voyage d'Uraniborg

    DEFF Research Database (Denmark)

    Pedersen, Kurt Møller

    1987-01-01

    In order to determine the difference in longitude between Tycho Brahe's observatory on the island of Hven and the new observatory in Paris, the French astronomer Jean Picard travelled to Copenhagen with the most accurate equipment to measure that difference. The mission was a success, he determin...

  9. Stability of Picard bundle over moduli space of stable vector bundles ...

    Indian Academy of Sciences (India)

    Springer Verlag Heidelberg #4 2048 1996 Dec 15 10:16:45

    E-mail: indranil@math.tifr.res.in; tomas@math.tifr.res.in. MS received 14 September 2000. Abstract. Answering a question of [BV] it is proved that the Picard bundle on the moduli space of stable vector bundles of rank two, on a Riemann surface of genus at least three, with fixed determinant of odd degree is stable. Keywords ...

  10. Picard iteration converges faster than Mann iteration for a class of quasi-contractive operators

    Directory of Open Access Journals (Sweden)

    Vasile Berinde

    2004-06-01

    Full Text Available In the class of quasi-contractive operators satisfying Zamfirescu's conditions, the most used fixed point iterative methods, that is, the Picard, Mann, and Ishikawa iterations, are all known to be convergent to the unique fixed point. In this paper, the comparison of the first two methods with respect to their convergence rate is obtained.

  11. Stability of Picard bundle over moduli space of stable vector bundles ...

    Indian Academy of Sciences (India)

    Springer Verlag Heidelberg #4 2048 1996 Dec 15 10:16:45

    Stability of Picard bundle over moduli space of stable vector bundles of rank two over a curve. INDRANIL BISWAS and TOM ´AS L G ´OMEZ. School of Mathematics, Tata Institute of Fundamental Research, Homi Bhabha Road,. Mumbai 400 005, India. E-mail: indranil@math.tifr.res.in; tomas@math.tifr.res.in. MS received 14 ...

  12. VERBAL POWER DUEL: VERBAL COMBAT STRATEGIES IN SHAKESPEARE'S JULIUS CAESAR:BRUTUS VERSUS ANTONY

    Directory of Open Access Journals (Sweden)

    AYDIN BEHNAM

    2009-01-01

    Full Text Available In A Glossary of Contemporary Literary Theory, Jeremy Hawthorn refers to Cultural Materialism as an "umbrella term" that allows itself the opulence to utilise a wide range of tools and theories from many different disciplines. This allows us to justify the nature of both commonly acknowledged and abstruse socio-cultural episteme and discourse, one of the most prominent of which is the issue of power and power relations.This paper, which was originally part of a larger body of work on Cultural Materialism, tries to draw upon a few different theories to examine the confrontational relationship that exists between the two prominent characters of Shakespeare's (1953 Julius Caesar (namely Antony and Brutus, as represented by the duel-like orations of the two characters. The main goal of the paper is to demonstrate how Antony is able to manipulate the words of Brutus against him and thus succeed in captivating the crowd.The theoretical discussions drawn upon in this article will include Austin's (1999 ideas on language as action, Bourdieu's (1999 argument of dialogue as contest and Hutchby's (1999 findings on turn-taking strategies. This paper will also incorporate Paul Grice's Cooperative Principle, introduced in his "Logic and Conversation" (1999. This principle argues that the flouting of any of Grice's four maxims by the characters is meaningful and effective because it introduces an "implicature" in the political and social context in which the pieces of discourse take place.

  13. Dr Andrea Granelli, Vice President, Telecom Italia

    CERN Multimedia

    Patrice Loïez

    2002-01-01

    Photo 06: Dr Andrea Granelli, Chief Executive Officer, Telecom Italia Lab (second from right) visiting the LHC superconducting magnet test hall with (from left to right) M. Cecchi , F. Gagliardi and G. Cavallari. Photo 15: Dr Andrea Granelli, Chief Executive Officer, Telecom Italia Lab (left) visiting the LHC superconducting magnet test hall with (from left to right) M. Cecchi and G. Cavallari.

  14. Comparison of the Rate of Convergence among Picard, Mann, Ishikawa, and Noor Iterations Applied to Quasicontractive Maps

    Directory of Open Access Journals (Sweden)

    Xue Zhiqun

    2010-01-01

    Full Text Available We provide sufficient conditions for Picard iteration to converge faster than Krasnoselskij, Mann, Ishikawa, or Noor iteration for quasicontractive operators. We also compare the rates of convergence between Krasnoselskij and Mann iterations for Zamfirescu operators.

  15. The discovery of microorganisms by Robert Hooke and Antoni Van Leeuwenhoek, fellows of the Royal Society.

    Science.gov (United States)

    Gest, Howard

    2004-05-01

    The existence of microscopic organisms was discovered during the period 1665-83 by two Fellows of The Royal Society, Robert Hooke and Antoni van Leeuwenhoek. In Micrographia (1665), Hooke presented the first published depiction of a microganism, the microfungus Mucor. Later, Leeuwenhoek observed and described microscopic protozoa and bacteria. These important revelations were made possible by the ingenuity of Hooke and Leeuwenhoek in fabricating and using simple microscopes that magnified objects from about 25-fold to 250-fold. After a lapse of more than 150 years, microscopy became the backbone of our understanding of the roles of microbes in the causation of infectious diseases and the recycling of chemical elements in the biosphere.

  16. Picard iterations for nonlinear Lipschitz strong pseudo-contractions in uniformly smooth Banach spaces

    International Nuclear Information System (INIS)

    Chidume, C.E.

    1995-06-01

    Suppose E is a real uniformly smooth Banach space and K is a nonempty closed convex and bounded subset of E, T:K → K is a Lipschitz pseudo-contraction. It is proved that the Picard iterates of a suitably defined operator converges strongly to the unique fixed point of T. Furthermore, this result also holds for the slightly larger class of Lipschitz strong hemi-contractions. Related results deal with strong convergence of the Picard iterates to the unique solution of operator equations involving Lipschitz strongly accretive maps. Apart from establishing strong convergence, our theorems give existence, uniqueness and convergence-rate which is at least as fast as a geometric progression. (author). 51 refs

  17. Radon emanation on San Andreas Fault

    International Nuclear Information System (INIS)

    King, C.-Y.

    1978-01-01

    It is stated that subsurface radon emanation monitored in shallow dry holes along an active segment of the San Andreas fault in central California shows spatially coherent large temporal variations that seem to be correlated with local seismicity. (author)

  18. Antony van Leeuwenhoek's microscopes and other scientific instruments: new information from the Delft archives.

    Science.gov (United States)

    Zuidervaart, Huib J; Anderson, Douglas

    2016-07-01

    This paper discusses the scientific instruments made and used by the microscopist Antony van Leeuwenhoek (1632-1723). The immediate cause of our study was the discovery of an overlooked document from the Delft archive: an inventory of the possessions that were left in 1745 after the death of Leeuwenhoek's daughter Maria. This list sums up which tools and scientific instruments Leeuwenhoek possessed at the end of his life, including his famous microscopes. This information, combined with the results of earlier historical research, gives us new insights about the way Leeuwenhoek began his lens grinding and how eventually he made his best lenses. It also teaches us more about Leeuwenhoek's work as a surveyor and a wine gauger. A further investigation of the 1747 sale of Leeuwenhoek's 531 single lens microscopes has not only led us to the identification of nearly all buyers, but also has provided us with some explanation about why only a dozen of this large number of microscopes has survived.

  19. Antoni marian gabryszewski as a pioneer of orthopaedics and rehabilitation in poland.

    Science.gov (United States)

    Jandziś, Sławomir

    2014-01-01

    This article describes the work of Dr. Antoni Marian Gabryszewski, orthopaedic surgeon, associate professor at Lvov University, towards the development of orthopaedics and rehabilitation in Poland before World War I. It is based on archival materials, publications in medical journals and articles from the daily press of that time. The author presents little-known facts concerning Dr. Gabryszewski's occupational and academic activity and his work at the Surgery Dept. of Lvov University as well as his habilitation dissertation, regarded as the first attempt to position orthopaedics as distinct from surgery in Poland. The article also describes his long-term work at the private Orthopaedic Facility established in 1898 in Lvov which later incorporated the Zander Institute in 1908. The Zander Institute was the first in Galicia to offer exercise machines designed by Dr. Gustav Zander, imported from Stockholm and enjoying an extraordinary popularity in the world. Dr. Gabryszewski's practice as a spa doctor, which he pursued in Iwonicz Zdrój in the summer months, is also presented. Dr. A. Gabryszewski introduced comprehensive rehabilitation to the treatment of orthopaedic patients both at the Surgery Dept. of Lvov University and at his Orthopaedic Facility. He used therapeutic gymnastics (particularly mechanotherapy), therapeutic massage, physical therapy and orthopaedic aids. Analysis of the source materials leads to unequivocal conclusions attesting to Dr. A. Gabryszewski's pioneering role and significant contribution to the development of orthopaedics and rehabilitation in Poland.

  20. Perspective View, San Andreas Fault

    Science.gov (United States)

    2000-01-01

    The prominent linear feature straight down the center of this perspective view is California's famous San Andreas Fault. The image, created with data from NASA's Shuttle Radar Topography Mission (SRTM), will be used by geologists studying fault dynamics and landforms resulting from active tectonics. This segment of the fault lies west of the city of Palmdale, Calif., about 100 kilometers (about 60 miles) northwest of Los Angeles. The fault is the active tectonic boundary between the North American plate on the right, and the Pacific plate on the left. Relative to each other, the Pacific plate is moving away from the viewer and the North American plate is moving toward the viewer along what geologists call a right lateral strike-slip fault. Two large mountain ranges are visible, the San Gabriel Mountains on the left and the Tehachapi Mountains in the upper right. Another fault, the Garlock Fault lies at the base of the Tehachapis; the San Andreas and the Garlock Faults meet in the center distance near the town of Gorman. In the distance, over the Tehachapi Mountains is California's Central Valley. Along the foothills in the right hand part of the image is the Antelope Valley, including the Antelope Valley California Poppy Reserve. The data used to create this image were acquired by SRTM aboard the Space Shuttle Endeavour, launched on February 11, 2000.This type of display adds the important dimension of elevation to the study of land use and environmental processes as observed in satellite images. The perspective view was created by draping a Landsat satellite image over an SRTM elevation model. Topography is exaggerated 1.5 times vertically. The Landsat image was provided by the United States Geological Survey's Earth Resources Observations Systems (EROS) Data Center, Sioux Falls, South Dakota.SRTM uses the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour

  1. On the innovative genius of Andreas Vesalius

    NARCIS (Netherlands)

    Brinkman, R.J.C.

    2017-01-01

    Andreas Vesalius (1515 - 1564) is generally considered to be the founding father of modern human anatomy. To commemorate his 500th birthday, some of the most striking anatomical and physiological aspects of Vesalius’ major work De Humani Corporis Fabrica Libri Septem (De Fabrica) are presented and

  2. A Response to Andrea R. Halpern's Commentary

    Directory of Open Access Journals (Sweden)

    Freya Bailes

    2007-05-01

    Full Text Available The author responds to points raised in Andrea Halpern’s commentary, which appeared in Vol. 2, No. 1 of Empirical Musicology Review. Discussion focuses on the apparent contradiction between self-reports of veridical mental imagery of musical timbre, and cognitive constraints on temporal memory for multidimensional sound.

  3. The San Andreas Fault 'Supersite' (Invited)

    Science.gov (United States)

    Hudnut, K. W.

    2013-12-01

    An expanded and permanent Supersite has been proposed to the Committee on Earth Observation Satellites (CEOS) for the San Andreas Fault system, based upon the successful initial Group on Earth Observations (GEO) Geohazard Supersite for the Los Angeles region from 2009-2013. As justification for the comprehensive San Andreas Supersite, consider the earthquake history of California, in particular the devastating M 7.8 San Francisco earthquake of 1906, which occurred along the San Andreas Fault, as did an earthquake of similar magnitude in 1857 in southern California. Los Angeles was only a small town then, but now the risk exposure has increased for both of California's megacities. Between the San Francisco and Los Angeles urban areas lies a section of the San Andreas Fault known to creep continually, so it has relatively less earthquake hazard. It used to be thought of as capable of stopping earthquakes entering it from either direction. Transitional behavior at either end of the creeping section is known to display a full range of seismic to aseismic slip events and accompanying seismicity and strain transient events. Because the occurrence of creep events is well documented by instrumental networks such as CISN and PBO, the San Andreas Supersite can be expected to be especially effective. A good baseline level of geodetic data regarding past events and strain accumulation and release exists. Many prior publications regarding the occurrence of geophysical phenomena along the San Andreas Fault system mean that in order to make novel contributions, state-of-the-art science will be required within this Supersite region. In more recent years, the 1989 Loma Prieta earthquake struck adjacent to the San Andreas Fault and caused the most damage along the western side of the San Francisco Bay Area. More recently, the concern has focused on the potential for future events along the Hayward Fault along the eastern side of San Francisco Bay. In Southern California, earthquakes

  4. SAFOD Penetrates the San Andreas Fault

    Directory of Open Access Journals (Sweden)

    Mark D. Zoback

    2006-03-01

    Full Text Available SAFOD, the San Andreas Fault Observatory at Depth (Fig. 1, completed an important milestone in July 2005 by drilling through the San Andreas Fault at seismogenic depth. SAFOD is one of three major components of EarthScope, a U.S. National Science Foundation (NSF initiative being conducted in collaboration with the U.S. Geological Survey (USGS. The International Continental Scientific DrillingProgram (ICDP provides engineering and technical support for the project as well as online access to project data and information (http://www.icdp-online.de/sites/sanandreas/news/news1.html. In 2002, the ICDP, the NSF, and the USGS provided funding for a pilot hole project at the SAFOD site. Twenty scientifi c papers summarizing the results of the pilot hole project as well as pre-SAFOD site characterization studies were published in Geophysical Research Letters (Vol.31, Nos. 12 and 15, 2004.

  5. Multiple Revolution Solutions for the Perturbed Lambert Problem using the Method of Particular Solutions and Picard Iteration

    Science.gov (United States)

    Woollands, Robyn M.; Read, Julie L.; Probe, Austin B.; Junkins, John L.

    2017-12-01

    We present a new method for solving the multiple revolution perturbed Lambert problem using the method of particular solutions and modified Chebyshev-Picard iteration. The method of particular solutions differs from the well-known Newton-shooting method in that integration of the state transition matrix (36 additional differential equations) is not required, and instead it makes use of a reference trajectory and a set of n particular solutions. Any numerical integrator can be used for solving two-point boundary problems with the method of particular solutions, however we show that using modified Chebyshev-Picard iteration affords an avenue for increased efficiency that is not available with other step-by-step integrators. We take advantage of the path approximation nature of modified Chebyshev-Picard iteration (nodes iteratively converge to fixed points in space) and utilize a variable fidelity force model for propagating the reference trajectory. Remarkably, we demonstrate that computing the particular solutions with only low fidelity function evaluations greatly increases the efficiency of the algorithm while maintaining machine precision accuracy. Our study reveals that solving the perturbed Lambert's problem using the method of particular solutions with modified Chebyshev-Picard iteration is about an order of magnitude faster compared with the classical shooting method and a tenth-twelfth order Runge-Kutta integrator. It is well known that the solution to Lambert's problem over multiple revolutions is not unique and to ensure that all possible solutions are considered we make use of a reliable preexisting Keplerian Lambert solver to warm start our perturbed algorithm.

  6. Total solar irradiance as measured by the SOVAP radiometer onboard PICARD

    Directory of Open Access Journals (Sweden)

    Meftah Mustapha

    2016-01-01

    Full Text Available From the SOlar VAriability PICARD (SOVAP space-based radiometer, we obtained a new time series of the total solar irradiance (TSI during Solar Cycle 24. Based on SOVAP data, we obtained that the TSI input at the top of the Earth’s atmosphere at a distance of one astronomical unit from the Sun is 1361.8 ± 2.4 W m−2 (1σ representative of the 2008 solar minimum period. From 2010 to 2014, the amplitude of the changes has been of the order of ± 0.1%, corresponding to a range of about 2.7 W m−2. To determine the TSI from SOVAP, we present here an improved instrument equation. A parameter was integrated from a theoretical analysis that highlighted the thermo-electrical non-equivalence of the radiometric cavity. From this approach, we obtained values that are lower than those previously provided with the same type of instrument. The results in this paper supersede the previous SOVAP analysis and provide the best SOVAP-based TSI-value estimate and its temporal variation.

  7. VizieR Online Data Catalog: SOVAP-PICARD total solar irradiance (Meftah+, 2016)

    Science.gov (United States)

    Meftah, M.; Chevalier, A.; Conscience, C.; Nevens, S.

    2017-10-01

    The Royal Meteorological Institute of Belgium (RMIB) has in its 33-year space history, since Spacelab in November 1983, launched six different TSI instruments of the DIfferential Absolute RADiometer (DIARAD) type on 11 space flights. The determination of the SOVAP TSI time series has required the establishment of modified instrument equations. For the nominal modes, a parameter (ΔPo) has been integrated from a theoretical analysis, which highlights the thermo-electrical non-equivalence of the radiometric cavity (open and closed). For the "Rad 10" mode, another parameter (KRad10) has been integrated from space calibration, which highlights the thermo-electrical non-equivalence between the right and the left cavity. TSI time series for different operation modes of SOVAP-DIARAD are displayed in Figure 3 using instrument equations. Thus, continuous time series of TSI observations have been constructed from the set of measurements made by the SOVAP radiometer from the different operation modes. The presented SOVAP composite includes all measurement modes normalised to the mean TSI of the "Auto 2" and "Auto 3" modes at the beginning of the PICARD mission. (1 data file).

  8. Ugala juurutab fantasy't / Andreas W ; interv. Margus Kasterpalu

    Index Scriptorium Estoniae

    Andreas W, pseud., 1969-

    1999-01-01

    "Meremaa võlur. Päeva kaldad", näidend Ursula K Le Guini "Meremaa võluri" teemadel,kirjutanud Andreas W ja lavastanud Andres Noormets, kunstnik Silver Vahtre, valguskunstnik Airi Eras, helikujundaja ja videograafik Andreas W. Esietendus Ugalas 29. apr.

  9. Synthetic seismicity for the San Andreas fault

    Directory of Open Access Journals (Sweden)

    S. N. Ward

    1994-06-01

    Full Text Available Because historical catalogs generally span only a few repetition intervals of major earthquakes, they do not provide much constraint on how regularly earthquakes recur. In order to obtain better recurrence statistics and long-term probability estimates for events M ? 6 on the San Andreas fault, we apply a seismicity model to this fault. The model is based on the concept of fault segmentation and the physics of static dislocations which allow for stress transfer between segments. Constraints are provided by geological and seismological observations of segment lengths, characteristic magnitudes and long-term slip rates. Segment parameters slightly modified from the Working Group on California Earthquake Probabilities allow us to reproduce observed seismicity over four orders of magnitude. The model yields quite irregular earthquake recurrence patterns. Only the largest events (M ? 7.5 are quasi-periodic; small events cluster. Both the average recurrence time and the aperiodicity are also a function of position along the fault. The model results are consistent with paleoseismic data for the San Andreas fault as well as a global set of historical and paleoseismic recurrence data. Thus irregular earthquake recurrence resulting from segment interaction is consistent with a large range of observations.

  10. Her Excellency Mrs Sarah Gillett Her Majesty's Ambassador to the Swiss Confederation United Kingdom of Great Britain and Northern Ireland on the occasion of the Antony Gormley sculpture unveiling ceremony Wednesday 7th December 2011

    CERN Multimedia

    Maximilien Brice

    2011-01-01

    Her Excellency Mrs Sarah Gillett Her Majesty's Ambassador to the Swiss Confederation United Kingdom of Great Britain and Northern Ireland on the occasion of the Antony Gormley sculpture unveiling ceremony Wednesday 7th December 2011

  11. ANTONI DOMÈNECH, THE AFFIRMATION OF THE REPUBLICAN-DEMOCRATIC TRADITION: EPISTEMOLOGY, HISTORY, ETHICS AND POLITICS

    Directory of Open Access Journals (Sweden)

    Jordi Mundó

    2018-01-01

    Full Text Available This article is a propaedeutic presentation of Antoni Domènech academic work, recently passed away. As a tribute, it will review and reconstruct their main scientific and philosophical contributions through the common thread that unites them all: republicanism. First, a reflection on the normative nature of the philosophy of knowledge, connected with the need to impose methodological requirements on deliberation in moral philosophy. Second, a reflection on the classical Mediterranean world link between ethics and politics, and the importance of moral self-selection. It follows from here a critique of the modern political separation of politics and ethics. Third, a reflection on the importance of becoming aware of the political traditions in which we live and do philosophy. Through the concept of fraternity, Domènech reconstructed conceptually and politically the historical tradition of democratic republicanism, founded on material independence and reciprocity in the political freedom of citizens. Deep and original thinker, he was very appreciated for his singular ability to use analytical tools from different fields of knowledge for the articulation of fundamental historical-philosophical and philosophical-political problems of our time.

  12. Strategie paratestuali nella lirica di Andrea Zanzotto

    Directory of Open Access Journals (Sweden)

    Matteo Tarricone

    2016-07-01

      A special perspective on the lyrics of Andrea Zanzotto is the constant reasoning on the constitutive aspects of poetry: an essential meditation to Zanzotto’s writing itself. Obviously, several different fundamental elements cannot but interact with this topic, such as the idea of landscape or of the lyrical I; influences of postmodernity on poetry; state of language and dialect, amongst others. They persist in any case on the background, though the central position is occupied by meta-reflection, which goes through and often matches many of the prevailing elements of this unique versification. Zanzotto expresses those concerns even by means of strategies with which he builds his collections; firstly, the paratext of his books, especially titles and notes; secondly, the distinctive feature of the twentieth - century canzoniere and the criteria designed to underline the strategies founding the collected works. There is really no lack of chance for research. Now, the hunt is on for the scented panther.

  13. [Joonas Sildre ; Andreas Trossek. Narratiivsus piltides] / Sven Vabar

    Index Scriptorium Estoniae

    Vabar, Sven, 1977-

    2010-01-01

    Arvustus: Trossek, Andreas ; Sildre, Joonas. Narratiivsus piltides. Eesti '00 aastate autorikoomiks. Osa 2 = Narration in pictures. Estonian alternative comics from the '00s. Part 2. Tallinn : Haus Galerii, 2009

  14. San Andreas Fault in the Carrizo Plain

    Science.gov (United States)

    2000-01-01

    The 1,200-kilometer (800-mile)San Andreas is the longest fault in California and one of the longest in North America. This perspective view of a portion of the fault was generated using data from the Shuttle Radar Topography Mission (SRTM), which flew on NASA's Space Shuttle last February, and an enhanced, true-color Landsat satellite image. The view shown looks southeast along the San Andreas where it cuts along the base of the mountains in the Temblor Range near Bakersfield. The fault is the distinctively linear feature to the right of the mountains. To the left of the range is a portion of the agriculturally rich San Joaquin Valley. In the background is the snow-capped peak of Mt. Pinos at an elevation of 2,692 meters (8,831 feet). The complex topography in the area is some of the most spectacular along the course of the fault. To the right of the fault is the famous Carrizo Plain. Dry conditions on the plain have helped preserve the surface trace of the fault, which is scrutinized by both amateur and professional geologists. In 1857, one of the largest earthquakes ever recorded in the United States occurred just north of the Carrizo Plain. With an estimated magnitude of 8.0, the quake severely shook buildings in Los Angeles, caused significant surface rupture along a 350-kilometer (220-mile) segment of the fault, and was felt as far away as Las Vegas, Nev. This portion of the San Andreas is an important area of study for seismologists. For visualization purposes, topographic heights displayed in this image are exaggerated two times.The elevation data used in this image was acquired by SRTM aboard the Space Shuttle Endeavour, launched on February 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on Endeavour in 1994. SRTM was designed to collect three-dimensional measurements of Earth's land surface. To collect the 3-D SRTM data, engineers added a mast 60

  15. The martyrdom of Doctor Andreas Vesalius.

    Science.gov (United States)

    Lasky, I I

    1990-10-01

    The development of modern medicine began in the 16th century when Dr. Andreas Vesalius overthrew the previously uncontested medical dogma of the Greek physician Galen. Medical progress had been hindered for more than a millennium by strict adherence to Galen's authority. Flemish-born Vesalius challenged the political and societal forces of the time. At the University of Padua, he studied and later taught human anatomy by performing dissections. His discoveries were published in 1543 in his monumental De Humani Corporis Fabrica. Controversy led to his resignation from the University of Padua. His magnum opus was interpreted as a challenge to both academia and the church. He went to Spain, where he served as personal physician to Emperor Charles V. After almost 20 years in Spain, he became involved in an unfortunate incident that incurred the condemnation of the Inquisition. The royal court's intervention saved Vesalius from being burned at the stake, however, and he was ordered to make a pilgrimage to Jerusalem to atone for his error. On the return voyage, he became ill and died on the Greek island of Zante.

  16. Rhazes in the Renaissance of Andreas Vesalius

    Science.gov (United States)

    Compier, Abdul Haq

    2012-01-01

    Andreas Vesalius' (1514–64) first publication was a Paraphrasis of the ninth book of the Liber ad Almansorem, written by the Arab–Persian physician and alchemist Rhazes (854–925). The role of Rhazes in Vesalius' oeuvre has thus far been much disregarded. The different ways Rhazes recurs reveal an intellectual evolution in Vesalius' work. In the Paraphrasis, Vesalius subjects Rhazes to the authority of Galen in the context of the early sixteenth-century humanist campaign for the substitution of Arab influences by Greek ‘originals’. Over the years Vesalius continues his work on Rhazes, but his approach becomes more internationalistic. Ultimately, Vesalius criticises Galen while expressing sympathy for the Arab author. This may be the more significant as Rhazes could have influenced Vesalius in the act of criticising Galen – critical discussions of Galen were available to Vesalius in Latin translations of Rhazes's Liber Continens. Although Vesalius never refers to the work, it is hardly possible he was unaware of it: similarities in structure, rhetoric and form between the Continens and the De humani corporis fabrica could support this hypothesis. PMID:23752981

  17. San Andreas tremor cascades define deep fault zone complexity

    Science.gov (United States)

    Shelly, David R.

    2015-01-01

    Weak seismic vibrations - tectonic tremor - can be used to delineate some plate boundary faults. Tremor on the deep San Andreas Fault, located at the boundary between the Pacific and North American plates, is thought to be a passive indicator of slow fault slip. San Andreas Fault tremor migrates at up to 30 m s-1, but the processes regulating tremor migration are unclear. Here I use a 12-year catalogue of more than 850,000 low-frequency earthquakes to systematically analyse the high-speed migration of tremor along the San Andreas Fault. I find that tremor migrates most effectively through regions of greatest tremor production and does not propagate through regions with gaps in tremor production. I interpret the rapid tremor migration as a self-regulating cascade of seismic ruptures along the fault, which implies that tremor may be an active, rather than passive participant in the slip propagation. I also identify an isolated group of tremor sources that are offset eastwards beneath the San Andreas Fault, possibly indicative of the interface between the Monterey Microplate, a hypothesized remnant of the subducted Farallon Plate, and the North American Plate. These observations illustrate a possible link between the central San Andreas Fault and tremor-producing subduction zones.

  18. Cheetham, Prof. Antony Kevin

    Indian Academy of Sciences (India)

    ACADEMY PUBLIC LECTURE: Animal Sex Determination by Genes, Chromosomes and Environment. Posted on 12th March 2018. SPEAKER: Prof. Jennifer A Marshal Graves. VENUE: Faculty Hall, Indian Institute of Science. 13 March 2018 ǀ 1600. Event poster ...

  19. Stress diffusion along the san andreas fault at parkfield, california.

    Science.gov (United States)

    Malin, P E; Alvarez, M G

    1992-05-15

    Beginning in January 1990, the epicenters of microearthquakes associated with a 12-month increase in seismicity near Parkfield, California, moved northwest to southeast along the San Andreas fault. During this sequence of events, the locally variable rate of cumulative seismic moment increased. This increase implies a local increase in fault slip. These data suggest that a southeastwardly diffusing stress front propagated along the San Andreas fault at a speed of 30 to 50 kilometers per year. Evidently, this front did not load the Parkfield asperities fast enough to produce a moderate earthquake; however, a future front might do so.

  20. Andreas Riis: a lifetime of colonial drama | Quartey | Research ...

    African Journals Online (AJOL)

    This article traces the adventures of Andreas Riis, a missionary assigned to the Gold Coast (West Africa) by the Basel Mission in the nineteenth century, as a narrative of landscapes, local inhabitants and power to show the complexity of missionary discourse. Various unpublished documents from the Basel Mission Archive ...

  1. Continuity of the San Andreas Fault at San Gorgonio Pass

    Science.gov (United States)

    Carena, S.; Suppe, J.

    2002-12-01

    The San Andreas fault at San Gorgonio Pass does not have a clear surface trace and is considered aseismic. Our findings suggest in fact that the existence of a through-going vertical or near-vertical San Andreas fault between Yucaipa and North Palm Springs is highly unlikely. We mapped over 70 faults in the San Gorgonio Pass-San Bernardino Mountains region using the catalog of 43,500 relocated 1975-1998 earthquakes of Richards-Dinger and Shearer (2000). A clustering algorithm was applied to the relocated earthquakes in order to obtain tighter earthquake clouds and thus better-defined fault surfaces. The earthquakes were then imported into Gocad, a 3D modeling software that allowed us to separate earthquakes into coplanar clusters associated with different faults and fault strands and to fit optimized surfaces to them. We also used the catalog of 13,000 focal mechanisms of Hauksson (2000) to confirm the nature of the mapped faults. We were able to constrain the 3D geometry of the San Andreas fault near San Gorgonio Pass from the 3D geometry of the fault network surrounding it. None of these faults show any displacement due to an hypothetical sub-vertical San Andreas. The San Andreas fault must therefore rotate to much shallower dips, or lose its continuity at depths between 3 and 15 km The most likely configuration is the one where the San Andreas fault merges into the shallow-dipping San Gorgonio Pass thrust W of North Palm Springs. Strike-slip motion is taken up by both the thrust (the slip vector on the N. Palm Springs segment is reverse/right-lateral strike-slip) and by a series of NW striking faults in the footwall of the thrust. The W termination of the most active part of the San Gorgonio Pass thrust coincides with one of these footwall faults at depth, and with the south bend in the San Andreas fault strand N of Banning. This boundary also marks a change in the stress field, with a dominant strike-slip regime to the E (and localized thrusting between San

  2. Andreas Vesalius 500 years - A Renaissance that revolutionized cardiovascular knowledge

    OpenAIRE

    Mesquita, Evandro Tinoco; Souza Júnior, Celso Vale de; Ferreira, Thiago Reigado

    2015-01-01

    AbstractThe history of medicine and cardiology is marked by some geniuses who dared in thinking, research, teaching and transmitting scientific knowledge, and the Italian Andreas Vesalius one of these brilliant masters. His main scientific work "De Humani Corporis Fabrica" is not only a landmark study of human anatomy but also an artistic work of high aesthetic quality published in 1543. In the year 2014 we celebrated 500 years since the birth of the brilliant professor of Padua University, w...

  3. Expression of San Andreas fault on Seasat radar image

    Science.gov (United States)

    Sabins, F. F., Jr.; Blom, R.; Elachi, C.

    1980-01-01

    A Seasat image (23.5 cm wavelength) of the Durmid Hills in southern California, the San Andreas Fault was analyzed. It is shown that a prominent southeast trending tonal lineament exists that is bright on the southwest side and dark on the northeast side. The cause of the contrasting signatures on opposite sides of the lineament was determined and the geologic signficance of the lineament was evaluated.

  4. San andreas fault zone head waves near parkfield, california.

    Science.gov (United States)

    Ben-Zion, Y; Malin, P

    1991-03-29

    Microearthquake seismograms from the borehole seismic network on the San Andreas fault near Parkfield, California, provide three lines of evidence that first P arrivals are "head" waves refracted along the cross-fault material contrast. First, the travel time difference between these arrivals and secondary phases identified as direct P waves scales linearly with the source-receiver distance. Second, these arrivals have the emergent wave character associated in theory and practice with refracted head waves instead of the sharp first breaks associated with direct P arrivals. Third, the first motion polarities of the emergent arrivals are reversed from those of the direct P waves as predicted by the theory of fault zone head waves for slip on the San Andreas fault. The presence of fault zone head waves in local seismic network data may help account for scatter in earthquake locations and source mechanisms. The fault zone head waves indicate that the velocity contrast across the San Andreas fault near Parkfield is approximately 4 percent. Further studies of these waves may provide a way of assessing changes in the physical state of the fault system.

  5. Coulomb Stress Accumulation along the San Andreas Fault System

    Science.gov (United States)

    Smith, Bridget; Sandwell, David

    2003-01-01

    Stress accumulation rates along the primary segments of the San Andreas Fault system are computed using a three-dimensional (3-D) elastic half-space model with realistic fault geometry. The model is developed in the Fourier domain by solving for the response of an elastic half-space due to a point vector body force and analytically integrating the force from a locking depth to infinite depth. This approach is then applied to the San Andreas Fault system using published slip rates along 18 major fault strands of the fault zone. GPS-derived horizontal velocity measurements spanning the entire 1700 x 200 km region are then used to solve for apparent locking depth along each primary fault segment. This simple model fits remarkably well (2.43 mm/yr RMS misfit), although some discrepancies occur in the Eastern California Shear Zone. The model also predicts vertical uplift and subsidence rates that are in agreement with independent geologic and geodetic estimates. In addition, shear and normal stresses along the major fault strands are used to compute Coulomb stress accumulation rate. As a result, we find earthquake recurrence intervals along the San Andreas Fault system to be inversely proportional to Coulomb stress accumulation rate, in agreement with typical coseismic stress drops of 1 - 10 MPa. This 3-D deformation model can ultimately be extended to include both time-dependent forcing and viscoelastic response.

  6. Dissatisfaction of Compact Picard Condition (CPC) with GRACE satellite data and its treatment by Generalized Tikhonov in Sobolev subspace

    Science.gov (United States)

    AllahTavakoli, Y.; Bagheri, H.; Safari, A.; Sharifi, M.

    2012-04-01

    This paper is mainly aiming to prove that the stripy noises in the map of earth's surface mass-density changes derived from GRACE Satellites gravimetry, is due to a dissatisfaction of Compact Picard Condition (CPC) with the GRACE data in the inversion of the Newton Integral Equation over the thin layer of earth; and hence the paper proposes the regularization strategies as efficient tools to treat the Ill-posedness and consequently to de-strip the data. First of all, we preferred to slightly modify the mathematical model of earth's surface mass-density changes developed creatively first by J. Wahr and et.al (1998), according to the all their previous assumptions plus taking into consideration the effect of the earth topography. By the modification we expect that some uncertainties in the prior model have been reduced to some extent. Then we analyzed the CPC on the model and we demonstrated how to perform Generalized Tikhonov regularization in Sobolev subspace for overcoming the instability of the problem. Then we applied the strategy in some simulations and case studies to validate our ideas. The simulations confirm that the stripy noises in the GRACE-derived map of the mass-density changes are due to the CPC dissatisfaction and furthermore the case studies show that Generalized Tikhonov regularization in Sobolev subspace is an influential filtering tool to de-strip the noisy data. Also, the case studies interestingly show that the effect of the topography is comparable to the effect of the load Love numbers on the Wahr's model; hence it may be taken into consideration when the load Love numbers have been taken into account.

  7. Assessing the beginning to end-of-mission sensitivity change of the PREcision MOnitor Sensor total solar irradiance radiometer (PREMOS/PICARD

    Directory of Open Access Journals (Sweden)

    Ball William T.

    2016-01-01

    Full Text Available The switching of the total solar irradiance (TSI backup radiometer (PREMOS-B to a primary role for 2 weeks at the end of the PICARD mission provides a unique opportunity to test the fundamental hypothesis of radiometer experiments in space, which is that the sensitivity change of instruments due to the space environment is identical for the same instrument type as a function of solar-exposure time of the instruments. We verify this hypothesis for the PREMOS TSI radiometers within the PREMOS experiment on the PICARD mission. We confirm that the sensitivity change of the backup instrument, PREMOS-B, is similar to that of the identically-constructed primary radiometer, PREMOS-A. The extended exposure of the backup instrument at the end of the mission allows for the assessment, with an uncertainty estimate, of the sensitivity change of the primary radiometer from the beginning of the PICARD mission compared to the end, and of the degradation of the backup over the mission. We correct six sets of PREMOS-B observations connecting October 2011 with February 2014, using six ratios from simultaneous PREMOS-A and PREMOS-B exposures during the first days of PREMOS-A operation in 2010. These ratios are then used, without indirect estimates or assumptions, to evaluate the stability of SORCE/TIM and SOHO/VIRGO TSI measurements, which have both operated for more than a decade and now show different trends over the time span of the PICARD mission, namely from 2010 to 2014. We find that by February 2014 relative to October 2011 PREMOS-B supports the SORCE/TIM TSI time evolution, which in May 2014 relative to October 2011 is ~0.11 W m−2, or ~84 ppm, higher than SOHO/VIRGO. Such a divergence between SORCE/TIM and SOHO/VIRGO over this period is a significant fraction of the estimated decline of 0.2 W m−2 between the solar minima of 1996 and 2008, and questions the reliability of that estimated trend. Extrapolating the uncertainty indicated by the

  8. Conductivity Structure of the San Andreas Fault, Parkfield, Revisited

    Science.gov (United States)

    Park, S. K.; Roberts, J. J.

    2003-12-01

    Laboratory measurements of samples of sedimentary rocks from the Parkfield syncline reveal resistivities as low as 1 ohm m when saturated with fluids comparable to those found in nearby wells. The syncline lies on the North American side of the San Andreas fault at Parkfield and plunges northwestward into the fault zone. A previous interpretation of a high resolution magnetotelluric profile across the San Andreas fault at Parkfield identified an anomalously conductive (1-3 ohm m) region just west of the fault and extending to depths of 3 km. These low resistivity rocks were inferred to be crushed rock in the fault zone that was saturated with brines. As an alternative to this interpretation, we suggest that this anomalous region is actually the Parkfield syncline and that the current trace of the San Andreas fault at Middle Mountain does not form the boundary between the Salinian block and the North American plate. Instead, that boundary is approximately 1 km west and collocated with current seismicity. This work was performed under the auspices of the U.S. Department of Energy by the University of California Lawrence Livermore National Laboratory under contract W-7405-ENG-48 and supported specifically by the Office of Basic Energy Science. Additional support was provided by the U.S. Geological Survey (USGS), Department of the Interior, under USGS Award number 03HQGR0041. The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Government.

  9. Periodic pulsing of characteristic microearthquakes on the San Andreas fault.

    Science.gov (United States)

    Nadeau, Robert M; McEvilly, Thomas V

    2004-01-09

    Deep fault slip information from characteristically repeating microearthquakes reveals previously unrecognized patterns of extensive, large-amplitude, long-duration, quasiperiodic repetition of aseismic events along much of a 175-kilometer segment of the central San Andreas fault. Pulsing occurs both in conjunction with and independent of transient slip from larger earthquakes. It extends to depths of approximately 10 to 11 kilometers but may be deeper, and it may be related to similar phenomena occurring in subduction zones. Over much of the study area, pulse onset periods also show a higher probability of larger earthquakes, which may provide useful information for earthquake forecasting.

  10. Nonvolcanic tremors deep beneath the San Andreas Fault.

    Science.gov (United States)

    Nadeau, Robert M; Dolenc, David

    2005-01-21

    We have discovered nonvolcanic tremor activity (i.e., long-duration seismic signals with no clear P or S waves) within a transform plate boundary zone along the San Andreas Fault near Cholame, California, the inferred epicentral region of the 1857 Fort Tejon earthquake (moment magnitude approximately 7.8). The tremors occur between 20 to 40 kilometers' depth, below the seismogenic zone (the upper approximately 15 kilometers of Earth's crust where earthquakes occur), and their activity rates may correlate with variations in local earthquake activity.

  11. Zemětřesná aktivita na zlomu San Andreas

    OpenAIRE

    Voroňáková, Jana

    2011-01-01

    SUMMARY: This work deals with the San Andreas fault as a tectonically active area. It includes basic information about the fracture, its origins and history. The work shows, as scientists are now trying to combat the risk of impending earthquakes. Project of San Andreas Fault Observatory at Depth and individual predictions of the next earthquake rupture are described.

  12. Deep permeability of the San Andreas Fault from San Andreas Fault Observatory at Depth (SAFOD) core samples

    Science.gov (United States)

    Morrow, Carolyn A.; Lockner, David A.; Moore, Diane E.; Hickman, Stephen H.

    2014-01-01

    The San Andreas Fault Observatory at Depth (SAFOD) scientific borehole near Parkfield, California crosses two actively creeping shear zones at a depth of 2.7 km. Core samples retrieved from these active strands consist of a foliated, Mg-clay-rich gouge containing porphyroclasts of serpentinite and sedimentary rock. The adjacent damage zone and country rocks are comprised of variably deformed, fine-grained sandstones, siltstones, and mudstones. We conducted laboratory tests to measure the permeability of representative samples from each structural unit at effective confining pressures, Pe up to the maximum estimated in situ Pe of 120 MPa. Permeability values of intact samples adjacent to the creeping strands ranged from 10−18 to 10−21 m2 at Pe = 10 MPa and decreased with applied confining pressure to 10−20–10−22 m2 at 120 MPa. Values for intact foliated gouge samples (10−21–6 × 10−23 m2 over the same pressure range) were distinctly lower than those for the surrounding rocks due to their fine-grained, clay-rich character. Permeability of both intact and crushed-and-sieved foliated gouge measured during shearing at Pe ≥ 70 MPa ranged from 2 to 4 × 10−22 m2 in the direction perpendicular to shearing and was largely insensitive to shear displacement out to a maximum displacement of 10 mm. The weak, actively-deforming foliated gouge zones have ultra-low permeability, making the active strands of the San Andreas Fault effective barriers to cross-fault fluid flow. The low matrix permeability of the San Andreas Fault creeping zones and adjacent rock combined with observations of abundant fractures in the core over a range of scales suggests that fluid flow outside of the actively-deforming gouge zones is probably fracture dominated.

  13. New evidence on the state of stress of the san andreas fault system.

    Science.gov (United States)

    Zoback, M D; Zoback, M L; Mount, V S; Suppe, J; Eaton, J P; Healy, J H; Oppenheimer, D; Reasenberg, P; Jones, L; Raleigh, C B; Wong, I G; Scotti, O; Wentworth, C

    1987-11-20

    Contemporary in situ tectonic stress indicators along the San Andreas fault system in central California show northeast-directed horizontal compression that is nearly perpendicular to the strike of the fault. Such compression explains recent uplift of the Coast Ranges and the numerous active reverse faults and folds that trend nearly parallel to the San Andreas and that are otherwise unexplainable in terms of strike-slip deformation. Fault-normal crustal compression in central California is proposed to result from the extremely low shear strength of the San Andreas and the slightly convergent relative motion between the Pacific and North American plates. Preliminary in situ stress data from the Cajon Pass scientific drill hole (located 3.6 kilometers northeast of the San Andreas in southern California near San Bernardino, California) are also consistent with a weak fault, as they show no right-lateral shear stress at approximately 2-kilometer depth on planes parallel to the San Andreas fault.

  14. Andreas Vesalius 500 years - A Renaissance that revolutionized cardiovascular knowledge

    Directory of Open Access Journals (Sweden)

    Evandro Tinoco Mesquita

    2015-04-01

    Full Text Available AbstractThe history of medicine and cardiology is marked by some geniuses who dared in thinking, research, teaching and transmitting scientific knowledge, and the Italian Andreas Vesalius one of these brilliant masters. His main scientific work "De Humani Corporis Fabrica" is not only a landmark study of human anatomy but also an artistic work of high aesthetic quality published in 1543. In the year 2014 we celebrated 500 years since the birth of the brilliant professor of Padua University, who with his courage and sense of observation changed the understanding of cardiovascular anatomy and founded a school to date in innovative education and research of anatomy. By identifying "the anatomical errors" present in Galen's book and speech, he challenged the dogmas of the Catholic Church, the academic world and the doctors of his time. However, the accuracy of his findings and his innovative way to disseminate them among his students and colleagues was essential so that his contributions are considered by many the landmark of modern medicine. His death is still surrounded by mysteries having different hypotheses, but a certainty, suffered sanctions of the Catholic Church for the spread of their ideas. The cardiologists, cardiovascular surgeons, interventional cardiologists, electrophysiologists and cardiovascular imaginologists must know the legacy of genius Andreas Vesalius that changed the paradigm of human anatomy.

  15. Tilt Precursors before Earthquakes on the San Andreas Fault, California.

    Science.gov (United States)

    Johnston, M J; Mortensen, C E

    1974-12-13

    An array of 14 biaxial shallow-borehole tiltmeters (at 1O(-7) radian sensitivity) has been installed along 85 kilometers of the San Andreas fault during the past year. Earthquake-related changes in tilt have been simultaneously observed on up to four independent instruments. At earthquake distances greater than 10 earthquake source dimensions, there are few clear indications of tilt change. For the four instruments with the longest records (> 10 months), 26 earthquakes have occurred since July 1973 with at least one instrument closer than 10 source dimensions and 8 earthquakes with more than one instrument within that distance. Precursors in tilt direction have been observed before more than 10 earthquakes or groups of earthquakes, and no similar effect has yet been seen without the occurrence of an earthquake.

  16. Electromagnetic Imaging of Fluids in the San Andreas Fault; FINAL

    International Nuclear Information System (INIS)

    Martyn Unsworth

    2002-01-01

    OAK 270 - Magnetotelluric data were collected on six profiles across the san Andreas Fault at Cholame,Parkfield, and Hollister in Central California. On each profile, high electrical resistivities were imaged west of the fault, and are due to granitic rocks of the Salinian block. East of the fault, lower electrical resistivities are associated with rocks of the Fanciscan formation. On the seismically active Parkfield and Hollister segments, a region of low resistivity was found in the fault zone that extends to a depth of several kilometers. This is due to a zone of fracturing (the damaged zone) that has been infiltrated by saline ground water. The shallowest micro-earthquakers occur at a depth that is coincident with the base of the low resistivity wedge. This strongly suggests that above this depth, the fault rocks are too weak to accumulate sufficient stress for earthquake rupture to occur and fault motion is accommodated through aseismic creep

  17. The San Andreas fault experiment. [gross tectonic plates relative velocity

    Science.gov (United States)

    Smith, D. E.; Vonbun, F. O.

    1973-01-01

    A plan was developed during 1971 to determine gross tectonic plate motions along the San Andreas Fault System in California. Knowledge of the gross motion along the total fault system is an essential component in the construction of realistic deformation models of fault regions. Such mathematical models will be used in the future for studies which will eventually lead to prediction of major earthquakes. The main purpose of the experiment described is the determination of the relative velocity of the North American and the Pacific Plates. This motion being so extremely small, cannot be measured directly but can be deduced from distance measurements between points on opposite sites of the plate boundary taken over a number of years.

  18. Andreas Vesalius (1514-1564) - an unfinished life.

    Science.gov (United States)

    Ambrose, Charles T

    2014-01-01

    The fame of Andreas Vesalius (1514-1564) rests on his anatomy text, De humani corporis fabrica, regarded as a seminal book in modern medicine. It was compiled while he taught anatomy at Padua, 1537-1543. Some of his findings challenged Galen's writings of the 2c AD, and caused De fabrica to be rejected immediately by classically trained anatomists. At age 29, Vesalius abandoned his studies and over the next two decades served as physician to Emperor Charles V of the Holy Roman Empire (HRE) and later to King Philip II of Spain in Madrid. In 1564, he sought to resume teaching anatomy in Padua, but release from royal service obliged him first to make a pilgrimage to Palestine. During the return voyage to Venice, he became ill and was put ashore alone on an Ionian island Zakynthos, where he died days later at age 50.

  19. A look inside the San Andreas Fault at Parkfield through vertical seismic profiling.

    Science.gov (United States)

    Chavarria, J Andres; Malin, Peter; Catchings, Rufus D; Shalev, Eylon

    2003-12-05

    The San Andreas Fault Observatory at Depth pilot hole is located on the southwestern side of the Parkfield San Andreas fault. This observatory includes a vertical seismic profiling (VSP) array. VSP seismograms from nearby microearthquakes contain signals between the P and S waves. These signals may be P and S waves scattered by the local geologic structure. The collected scattering points form planar surfaces that we interpret as the San Andreas fault and four other secondary faults. The scattering process includes conversions between P and S waves, the strengths of which suggest large contrasts in material properties, possibly indicating the presence of cracks or fluids.

  20. Earthquake Swarm Along the San Andreas Fault near Palmdale, Southern California, 1976 to 1977.

    Science.gov (United States)

    McNally, K C; Kanamori, H; Pechmann, J C; Fuis, G

    1978-09-01

    Between November 1976 and November 1977 a swarm of small earthquakes (local magnitude San Andreas fault near Palmdale, California. This swarm was the first observed along this section of the San Andreas since cataloging of instrumental data began in 1932. The activity followed partial subsidence of the 35-centimeter vertical crustal uplift known as the Palmdale bulge along this "locked" section of the San Andreas, which last broke in the great (surface-wave magnitude = 8(1/4)+) 1857 Fort Tejon earthquake. The swarm events exhibit characteristics previously observed for some foreshock sequences, such as tight clustering of hypocenters and time-dependent rotations of stress axes inferred from focal mechanisms. However, because of our present lack of understanding of the processes that precede earthquake faulting, the implications of the swarm for future large earthquakes on the San Andreas fault are unknown.

  1. Resurvey of site stability quadrilaterals, Otay Mountain and Quincy, California. [San Andreas fault experiment

    Science.gov (United States)

    Scholz, C. H.

    1977-01-01

    Trilateration quadrilaterals established across two faults near the San Andreas Fault Experiment laser/satellite ranging sites were resurveyed after four years. No evidence of significant tectonic motion was found.

  2. Assistant professor Andrea Wittenborn, research team conduct clinical trial to treat couples' depression, marital problems

    OpenAIRE

    Micale, Barbara L.

    2010-01-01

    Andrea Wittenborn, assistant professor, human development, is heading a research team conducting the Strengthening Bonds Couples Therapy Study to treat depression and marital problems (dyadic distress) in married/committed couple relationships.

  3. A case for historic joint rupture of the San Andreas and San Jacinto faults

    OpenAIRE

    Lozos, Julian C.

    2016-01-01

    The San Andreas fault is considered to be the primary plate boundary fault in southern California and the most likely fault to produce a major earthquake. I use dynamic rupture modeling to show that the San Jacinto fault is capable of rupturing along with the San Andreas in a single earthquake, and interpret these results along with existing paleoseismic data and historic damage reports to suggest that this has likely occurred in the historic past. In particular, I find that paleoseismic data...

  4. Fracture surface energy of the Punchbowl fault, San Andreas system.

    Science.gov (United States)

    Chester, Judith S; Chester, Frederick M; Kronenberg, Andreas K

    2005-09-01

    Fracture energy is a form of latent heat required to create an earthquake rupture surface and is related to parameters governing rupture propagation and processes of slip weakening. Fracture energy has been estimated from seismological and experimental rock deformation data, yet its magnitude, mechanisms of rupture surface formation and processes leading to slip weakening are not well defined. Here we quantify structural observations of the Punchbowl fault, a large-displacement exhumed fault in the San Andreas fault system, and show that the energy required to create the fracture surface area in the fault is about 300 times greater than seismological estimates would predict for a single large earthquake. If fracture energy is attributed entirely to the production of fracture surfaces, then all of the fracture surface area in the Punchbowl fault could have been produced by earthquake displacements totalling <1 km. But this would only account for a small fraction of the total energy budget, and therefore additional processes probably contributed to slip weakening during earthquake rupture.

  5. A simulation of the San Andreas fault experiment

    Science.gov (United States)

    Agreen, R. W.; Smith, D. E.

    1974-01-01

    The San Andreas fault experiment (Safe), which employs two laser tracking systems for measuring the relative motion of two points on opposite sides of the fault, has been simulated for an 8-yr observation period. The two tracking stations are located near San Diego on the western side of the fault and near Quincy on the eastern side; they are roughly 900 km apart. Both will simultaneously track laser reflector equipped satellites as they pass near the stations. Tracking of the Beacon Explorer C spacecraft has been simulated for these two stations during August and September for 8 consecutive years. An error analysis of the recovery of the relative location of Quincy from the data has been made, allowing for model errors in the mass of the earth, the gravity field, solar radiation pressure, atmospheric drag, errors in the position of the San Diego site, and biases and noise in the laser systems. The results of this simulation indicate that the distance of Quincy from San Diego will be determined each year with a precision of about 10 cm. Projected improvements in these model parameters and in the laser systems over the next few years will bring the precision to about 1-2 cm by 1980.

  6. Interseismic strain accumulation and the earthquake potential on the southern San Andreas fault system.

    Science.gov (United States)

    Fialko, Yuri

    2006-06-22

    The San Andreas fault in California is a mature continental transform fault that accommodates a significant fraction of motion between the North American and Pacific plates. The two most recent great earthquakes on this fault ruptured its northern and central sections in 1906 and 1857, respectively. The southern section of the fault, however, has not produced a great earthquake in historic times (for at least 250 years). Assuming the average slip rate of a few centimetres per year, typical of the rest of the San Andreas fault, the minimum amount of slip deficit accrued on the southern section is of the order of 7-10 metres, comparable to the maximum co-seismic offset ever documented on the fault. Here I present high-resolution measurements of interseismic deformation across the southern San Andreas fault system using a well-populated catalogue of space-borne synthetic aperture radar data. The data reveal a nearly equal partitioning of deformation between the southern San Andreas and San Jacinto faults, with a pronounced asymmetry in strain accumulation with respect to the geologically mapped fault traces. The observed strain rates confirm that the southern section of the San Andreas fault may be approaching the end of the interseismic phase of the earthquake cycle.

  7. Vibroseis Monitoring of San Andreas Fault in California

    Energy Technology Data Exchange (ETDEWEB)

    Korneev, Valeri; Nadeau, Robert

    2004-06-11

    A unique data set of seismograms for 720 source-receiver paths has been collected as part of a controlled source Vibroseis experiment San Andreas Fault (SAF) at Parkfield. In the experiment, seismic waves repeatedly illuminated the epicentral region of the expected M6 event at Parkfield from June 1987 until November 1996. For this effort, a large shear-wave vibrator was interfaced with the 3-component (3-C) borehole High-Resolution Seismic Network (HRSN), providing precisely timed collection of data for detailed studies of changes in wave propagation associated with stress and strain accumulation in the fault zone (FZ). Data collected by the borehole network were examined for evidence of changes associated with the nucleation process of the anticipated M6 earthquake at Parkfield. These investigations reported significant traveltime changes in the S coda for paths crossing the fault zone southeast of the epicenter and above the rupture zone of the 1966 M6 earthquake. Analysis and modeling of these data and comparison with observed changes in creep, water level, microseismicity, slip-at-depth and propagation from characteristic repeating microearthquakes showed temporal variations in a variety of wave propagation attributes that were synchronous with changes in deformation and local seismicity patterns. Numerical modeling suggests 200 meters as an effective thickness of SAF. The observed variations can be explained by velocity 6 percent velocity variation within SAF core. Numerical modeling studies and a growing number of observations have argued for the propagation of fault-zone guided waves (FZGW) within a SAF zone that is 100 to 200 m wide at seismogenic depths and with 20 to 40 percent lower shear-wave velocity than the adjacent unfaulted rock. Guided wave amplitude tomographic inversion for SAF using microearthquakes, shows clearly that FZGW are significantly less attenuated in a well-defined region of the FZ. This region plunges to the northwest along the

  8. San Andreas-sized Strike-slip Fault on Europa

    Science.gov (United States)

    1998-01-01

    This mosaic of the south polar region of Jupiter's moon Europa shows the northern 290 kilometers (180 miles) of a strike-slip fault named Astypalaea Linea. The entire fault is about 810 kilometers (500 miles) long, about the size of the California portion of the San Andreas fault, which runs from the California-Mexico border north to the San Francisco Bay. In a strike-slip fault, two crustal blocks move horizontally past one another, similar to two opposing lanes of traffic. Overall motion along the fault seems to have followed a continuous narrow crack along the feature's entire length, with a path resembling steps on a staircase crossing zones that have been pulled apart. The images show that about 50 kilometers (30 miles) of displacement have taken place along the fault. The fault's opposite sides can be reconstructed like a puzzle, matching the shape of the sides and older, individual cracks and ridges broken by its movements. [figure removed for brevity, see original site] The red line marks the once active central crack of the fault. The black line outlines the fault zone, including material accumulated in the regions which have been pulled apart. Bends in the fault have allowed the surface to be pulled apart. This process created openings through which warmer, softer ice from below Europa's brittle ice shell surface, or frozen water from a possible subsurface ocean, could reach the surface. This upwelling of material formed large areas of new ice within the boundaries of the original fault. A similar pulling-apart phenomenon can be observed in the geological trough surrounding California's Salton Sea, in Death Valley and the Dead Sea. In those cases, the pulled-apart regions can include upwelled materials, but may be filled mostly by sedimentary and eroded material from above. One theory is that fault motion on Europa is induced by the pull of variable daily tides generated by Jupiter's gravitational tug on Europa. Tidal tension opens the fault and

  9. Correction to “Constraints on the stress state of the San Andreas Fault with analysis based on core and cuttings from San Andreas Fault Observatory at Depth (SAFOD) drilling phases 1 and 2”

    Science.gov (United States)

    Tembe, Sheryl; Lockner, David; Wong, Teng-Fong

    2010-01-01

    This article corrects: Constraints on the stress state of the San Andreas Fault with analysis based on core and cuttings from San Andreas Fault Observatory at Depth (SAFOD) drilling phases 1 and 2. Vol. 114, Issue B11, Article first published online: 5 NOV 2009.

  10. Irregular recurrence of large earthquakes along the san andreas fault: evidence from trees.

    Science.gov (United States)

    Jacoby, G C; Sheppard, P R; Sieh, K E

    1988-07-08

    Old trees growing along the San Andreas fault near Wrightwood, California, record in their annual ring-width patterns the effects of a major earthquake in the fall or winter of 1812 to 1813. Paleoseismic data and historical information indicate that this event was the "San Juan Capistrano" earthquake of 8 December 1812, with a magnitude of 7.5. The discovery that at least 12 kilometers of the Mojave segment of the San Andreas fault ruptured in 1812, only 44 years before the great January 1857 rupture, demonstrates that intervals between large earthquakes on this part of the fault are highly variable. This variability increases the uncertainty of forecasting destructive earthquakes on the basis of past behavior and accentuates the need for a more fundamental knowledge of San Andreas fault dynamics.

  11. Postseismic relaxation along the San Andreas fault at Parkfield from continuous seismological observations.

    Science.gov (United States)

    Brenguier, F; Campillo, M; Hadziioannou, C; Shapiro, N M; Nadeau, R M; Larose, E

    2008-09-12

    Seismic velocity changes and nonvolcanic tremor activity in the Parkfield area in California reveal that large earthquakes induce long-term perturbations of crustal properties in the San Andreas fault zone. The 2003 San Simeon and 2004 Parkfield earthquakes both reduced seismic velocities that were measured from correlations of the ambient seismic noise and induced an increased nonvolcanic tremor activity along the San Andreas fault. After the Parkfield earthquake, velocity reduction and nonvolcanic tremor activity remained elevated for more than 3 years and decayed over time, similarly to afterslip derived from GPS (Global Positioning System) measurements. These observations suggest that the seismic velocity changes are related to co-seismic damage in the shallow layers and to deep co-seismic stress change and postseismic stress relaxation within the San Andreas fault zone.

  12. Low strength of deep San Andreas fault gouge from SAFOD core.

    Science.gov (United States)

    Lockner, David A; Morrow, Carolyn; Moore, Diane; Hickman, Stephen

    2011-04-07

    The San Andreas fault accommodates 28-34 mm yr(-1) of right lateral motion of the Pacific crustal plate northwestward past the North American plate. In California, the fault is composed of two distinct locked segments that have produced great earthquakes in historical times, separated by a 150-km-long creeping zone. The San Andreas Fault Observatory at Depth (SAFOD) is a scientific borehole located northwest of Parkfield, California, near the southern end of the creeping zone. Core was recovered from across the actively deforming San Andreas fault at a vertical depth of 2.7 km (ref. 1). Here we report laboratory strength measurements of these fault core materials at in situ conditions, demonstrating that at this locality and this depth the San Andreas fault is profoundly weak (coefficient of friction, 0.15) owing to the presence of the smectite clay mineral saponite, which is one of the weakest phyllosilicates known. This Mg-rich clay is the low-temperature product of metasomatic reactions between the quartzofeldspathic wall rocks and serpentinite blocks in the fault. These findings provide strong evidence that deformation of the mechanically unusual creeping portions of the San Andreas fault system is controlled by the presence of weak minerals rather than by high fluid pressure or other proposed mechanisms. The combination of these measurements of fault core strength with borehole observations yields a self-consistent picture of the stress state of the San Andreas fault at the SAFOD site, in which the fault is intrinsically weak in an otherwise strong crust. ©2011 Macmillan Publishers Limited. All rights reserved

  13. Local geomagnetic events associated with displacements on the san andreas fault.

    Science.gov (United States)

    Breiner, S; Kovach, R L

    1967-10-06

    The piezomagnetic properties of rock suggest that a change in subsurface stress will manifest itself as a change in the magnetic susceptibility and remanent magnetization and hence the local geomagnetic field. A differential array of magnetometers has been operating since late 1965 on the San Andreas fault in the search for piezomagnetic signals under conditions involving active fault stress. Local changes in the geomagnetic field have been observed near Hollister, California, some tens of hours preceding the onset of abrupt creep displacement on the San Andreas fault.

  14. Vertical deformation along the Indio Hills, San Andreas Fault, California

    Science.gov (United States)

    Scharer, K. M.; Blisniuk, K.; Sharp, W. D.; Williams, P. L.; Johnson, K.

    2014-12-01

    Halfway between the Salton Sea and San Gorgonio Pass, the southernmost San Andreas Fault (SAF) bifurcates into the Mission Creek and Banning strands. These strands bound the Indio Hills (IH), and mark the first of a series of left-stepping branches that define the transpressional, southern Big Bend of the SAF. Between the fault strands, the Quaternary Ocotillo Formation is deformed with fold axis orientations consistent with dextral shear; structurally the IH are synclinal in the east, transitioning to a complex antiform with increased uplift suggested by exhumation of Tertiary units in the west. We report new long- and short-term erosion rates across the IH and uplift rates on the Banning strand, and we evaluate these measurements in terms of slip rates across the fault system and structural deformation within the IH. Two methods of catchment-averaged erosion rates provide minimum rates yield similar results, (0.08 to 0.34 mm/yr) across 6 catchments. The long-term rates are calculated from eroded volumes estimated from a 10-m DEM surface enveloping the Indio Hills and assume that all folding and uplift initiated ca. 500ka (the 750 ka Bishop ash is uplifted and warped within the IH). The short-term rates, determined from 10Be dating of alluvial sediments, increase gradually to the northwest. Similarity of the rates suggests steady state uplift over the history of the fold; ongoing structural analysis and dating needed to constrain the maximum rates will test this possibility. The new uplift rate for the Banning strand at the east end of the IH is determined from a 60 pts/m^2 DEM produced by structure from motion photogrammetry and U-series ages and cosmogenic dates that provide an age range of 20-76ka for a fan vertically offset by ~2.5 m. The resulting uplift rate on the fault (0.03-0.125 mm/yr) overlaps with the short-term catchment-averaged erosion rate for this location (0.08 mm/yr). Consequently, we interpret that vertical strain is partitioned onto both the

  15. Comparison of 37 months global net radiation flux derived from PICARD-BOS over the same period observations of CERES and ARGO

    Science.gov (United States)

    Zhu, Ping; Wild, Martin

    2016-04-01

    The absolute level of the global net radiation flux (NRF) is fixed at the level of [0.5-1.0] Wm-2 based on the ocean heat content measurements [1]. The space derived global NRF is at the same order of magnitude than the ocean [2]. Considering the atmosphere has a negligible effects on the global NRF determination, the surface global NRF is consistent with the values determined from space [3]. Instead of studying the absolute level of the global NRF, we focus on the interannual variation of global net radiation flux, which were derived from the PICARD-BOS experiment and its comparison with values over the same period but obtained from the NASA-CERES system and inferred from the ocean heat content survey by ARGO network. [1] Allan, Richard P., Chunlei Liu, Norman G. Loeb, Matthew D. Palmer, Malcolm Roberts, Doug Smith, and Pier-Luigi Vidale (2014), Changes in global net radiative imbalance 1985-2012, Geophysical Research Letters, 41 (no.15), 5588-5597. [2] Loeb, Norman G., John M. Lyman, Gregory C. Johnson, Richard P. Allan, David R. Doelling, Takmeng Wong, Brian J. Soden, and Graeme L. Stephens (2012), Observed changes in top-of-the-atmosphere radiation and upper-ocean heating consistent within uncertainty, Nature Geoscience, 5 (no.2), 110-113. [3] Wild, Martin, Doris Folini, Maria Z. Hakuba, Christoph Schar, Sonia I. Seneviratne, Seiji Kato, David Rutan, Christof Ammann, Eric F. Wood, and Gert Konig-Langlo (2015), the energy balance over land and oceans: an assessment based on direct observations and CMIP5 climate models, Climate Dynamics, 44 (no.11-12), 3393-3429.

  16. Kunagi nii popp idabloki kadunud filmikunst / Eva Näripea, Andreas Trossek ; intervjueerinud Ave Randviir

    Index Scriptorium Estoniae

    Näripea, Eva

    2009-01-01

    2007. a. oktoobris toimunud konverentsi "Via Transversa : Lost Cinema of the Former Eastern Bloc" ettekannetel põhinevast kogumikust: Via Transversa : Lost Cinema of the Former Eastern Bloc / editors Eva Näripea, Andreas Trossek. Tallinn : Eesti Kunstiakadeemia, 2008. (Koht ja paik ; 7)

  17. Der Bildhauer Andreas Schweigl und die Sakralkunst in Mähren zur Zeit der josephinischen Reformen

    Czech Academy of Sciences Publication Activity Database

    Suchánek, P.; Valeš, Tomáš

    2015-01-01

    Roč. 63, č. 3 (2015), s. 156-181 ISSN 0049-5123 R&D Projects: GA ČR GAP409/12/0617 Institutional support: RVO:68378033 Keywords : Andreas Schweigl * sculpture * sacred art * Enlightenment Subject RIV: AL - Art, Architecture, Cultural Heritage http://www.umeni-art.cz/cz/issue-detail.aspx?v=issue-issue-2518

  18. Mantle strength of the San Andreas fault system and the role of mantle-crust feedbacks

    NARCIS (Netherlands)

    Chatzaras, V.; Tikoff, B.; Newman, J.; Withers, A.C.; Drury, M.R.

    2015-01-01

    In lithospheric-scale strike-slip fault zones, upper crustal strength is well constrained from borehole observations and fault rock deformation experiments, but mantle strength is less well known. Using peridotite xenoliths, we show that the upper mantle below the San Andreas fault system

  19. 1855 and 1991 Surveys of the San Andreas Fault: Implications for Fault Machanics

    Science.gov (United States)

    Grant, Lisa B.; Donnellan, Andrea

    1993-01-01

    Two monuments from an 1855 survey that spans the San Andreas fault in the Carrizo Plain have been displaced 11.0+/-2.5m right-laterally by the 1857 Fort Tejon earthquake and associated seismicity and afterslip by the 1857 Fort Tejon earthquake and associated seismicity and afterslip.

  20. Neotectonics of the San Andreas Fault system, basin and range province juncture

    Science.gov (United States)

    Estes, J. E.; Crowell, J. C.

    1982-01-01

    The development, active processes, and tectonic interplay of the southern San Andreas fault system and the basin and range province were studied. The study consist of data acquisition and evaluation, technique development, and image interpretation and mapping. Potentially significant geologic findings are discussed.

  1. Perspective view, Landsat overlay San Andreas Fault, Palmdale, California

    Science.gov (United States)

    2000-01-01

    The prominent linear feature straight down the center of this perspective view is the San Andreas Fault. This segment of the fault lies near the city of Palmdale, California (the flat area in the right half of the image) about 60 kilometers (37 miles) north of Los Angeles. The fault is the active tectonic boundary between the North American plate on the right, and the Pacific plate on the left. Relative to each other, the Pacific plate is moving away from the viewer and the North American plate is moving toward the viewer along what geologists call a right lateral strike-slip fault. Two large mountain ranges are visible, the San Gabriel Mountains on the left and the Tehachapi Mountains in the upper right. The Lake Palmdale Reservoir, approximately 1.5 kilometers (0.9 miles) across, sits in the topographic depression created by past movement along the fault. Highway 14 is the prominent linear feature starting at the lower left edge of the image and continuing along the far side of the reservoir. The patterns of residential and agricultural development around Palmdale are seen in the Landsat imagery in the right half of the image. SRTM topographic data will be used by geologists studying fault dynamics and landforms resulting from active tectonics.This type of display adds the important dimension of elevation to the study of land use and environmental processes as observed in satellite images. The perspective view was created by draping a Landsat satellite image over an SRTM elevation model. Topography is exaggerated 1.5 times vertically. The Landsat image was provided by the United States Geological Survey's Earth Resources Observations Systems (EROS) Data Center, Sioux Falls, South Dakota.Elevation data used in this image was acquired by the Shuttle Radar Topography Mission (SRTM) aboard the Space Shuttle Endeavour, launched on February 11,2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR

  2. Evidence from precise earthquake hypocenters for segmentation of the San Andreas Fault in San Gorgonio Pass

    Science.gov (United States)

    Magistrale, Harold; Sanders, Christopher

    1996-02-01

    We use precise hypocenter patterns and focal mechanisms to investigate the presence or absence of a continuous strike-slip fault at depth connecting the San Bernardino strand of the San Andreas fault with the Coachella Valley segment of the Banning fault. We inverted 560,000 arrival times from 23,000 earthquakes (1981-1993) for high-quality hypocenters and three-dimensional P wave velocity structure in a 1° by 2° area centered on the San Gorgonio Pass. Cross-sectional plots of relocated earthquakes reveal an abrupt 5 to 7 km high step in the maximum depth of hypocenters. The step riser defines a near-vertical, locally curved surface that extends westerly more than 60 km from the Coachella Valley segment of the San Andreas fault to the San Jacinto fault. A hypothetical continuous vertical San Andreas fault through San Gorgonio Pass would cross the step at an oblique angle. We suggest that the step is the expression of the contact between different basement rock types juxtaposed by large-scale right-slip motion on the ancestral San Andreas fault. South of the step in Peninsular Ranges type basement (intrusives), brittle failure occurs down to about 20-km depth, while north of the step in San Bernardino type basement (Pelona schist), brittle failure occurs to only about 13-km depth. The step provides a piercing plane that should be offset about 3 km right laterally by an active, continuous, vertical San Andreas fault. Within the resolution of our mapping the step is not offset in this manner, implying either that there has not been a throughgoing vertical fault at depth, that a throughgoing fault has not experienced enough slip to offset the step, or that a throughgoing fault is not vertical and dips north over the top of the step. Hypocentral patterns and focal mechanisms indicate distributed deformation (thrust, normal, and strike-slip faulting) over a large volume in the San Gorgonio Pass region; there is no evidence of hypocenter or slip vector alignments that

  3. Talc-bearing serpentinite and the creeping section of the San Andreas fault

    Science.gov (United States)

    Moore, Diane E.; Rymer, M.J.

    2007-01-01

    The section of the San Andreas fault located between Cholame Valley and San Juan Bautista in central California creeps at a rate as high as 28 mm yr -1 (ref. 1), and it is also the segment that yields the best evidence for being a weak fault embedded in a strong crust. Serpentinized ultramafic rocks have been associated with creeping faults in central and northern California, and serpentinite is commonly invoked as the cause of the creep and the low strength of this section of the San Andreas fault. However, the frictional strengths of serpentine minerals are too high to satisfy the limitations on fault strength, and these minerals also have the potential for unstable slip under some conditions. Here we report the discovery of talc in cuttings of serpentinite collected from the probable active trace of the San Andreas fault that was intersected during drilling of the San Andreas Fault Observatory at Depth (SAFOD) main hole in 2005. We infer that the talc is forming as a result of the reaction of serpentine minerals with silica-saturated hydrothermal fluids that migrate up the fault zone, and the talc commonly occurs in sheared serpentinite. This discovery is significant, as the frictional strength of talc at elevated temperatures is sufficiently low to meet the constraints on the shear strength of the fault, and its inherently stable sliding behaviour is consistent with fault creep. Talc may therefore provide the connection between serpentinite and creep in the San Andreas fault, if shear at depth can become localized along a talc-rich principal-slip surface within serpentinite entrained in the fault zone. ??2007 Nature Publishing Group.

  4. Talc-bearing serpentinite and the creeping section of the San Andreas fault.

    Science.gov (United States)

    Moore, Diane E; Rymer, Michael J

    2007-08-16

    The section of the San Andreas fault located between Cholame Valley and San Juan Bautista in central California creeps at a rate as high as 28 mm yr(-1) (ref. 1), and it is also the segment that yields the best evidence for being a weak fault embedded in a strong crust. Serpentinized ultramafic rocks have been associated with creeping faults in central and northern California, and serpentinite is commonly invoked as the cause of the creep and the low strength of this section of the San Andreas fault. However, the frictional strengths of serpentine minerals are too high to satisfy the limitations on fault strength, and these minerals also have the potential for unstable slip under some conditions. Here we report the discovery of talc in cuttings of serpentinite collected from the probable active trace of the San Andreas fault that was intersected during drilling of the San Andreas Fault Observatory at Depth (SAFOD) main hole in 2005. We infer that the talc is forming as a result of the reaction of serpentine minerals with silica-saturated hydrothermal fluids that migrate up the fault zone, and the talc commonly occurs in sheared serpentinite. This discovery is significant, as the frictional strength of talc at elevated temperatures is sufficiently low to meet the constraints on the shear strength of the fault, and its inherently stable sliding behaviour is consistent with fault creep. Talc may therefore provide the connection between serpentinite and creep in the San Andreas fault, if shear at depth can become localized along a talc-rich principal-slip surface within serpentinite entrained in the fault zone.

  5. Habitat information in the region on the underwater San Andreas Fault - Topic: Exploring the Undersea San Andreas Fault: Revealing the Past, Present, and Future at the Centennial of the Great 1906 Earthquake

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — During this exploration, the first comprehensive high-resolution multi-beam sonar and seismic reflection survey of the Northern San Andreas Fault (NSAF) was...

  6. Earthquake geology and paleoseismology of major strands of the San Andreas fault system: Chapter 38

    Science.gov (United States)

    Rockwell, Thomas; Scharer, Katherine M.; Dawson, Timothy E.

    2016-01-01

    The San Andreas fault system in California is one of the best-studied faults in the world, both in terms of the long-term geologic history and paleoseismic study of past surface ruptures. In this paper, we focus on the Quaternary to historic data that have been collected from the major strands of the San Andreas fault system, both on the San Andreas Fault itself, and the major subparallel strands that comprise the plate boundary, including the Calaveras-Hayward- Rogers Creek-Maacama fault zone and the Concord-Green Valley-Bartlett Springs fault zone in northern California, and the San Jacinto and Elsinore faults in southern California. The majority of the relative motion between the Pacific and North American lithospheric plates is accommodated by these faults, with the San Andreas slipping at about 34 mm/yr in central California, decreasing to about 20 mm/yr in northern California north of its juncture with the Calaveras and Concord faults. The Calaveras-Hayward-Rogers Creek-Maacama fault zone exhibits a slip rate of 10-15 mm/yr, whereas the rate along the Concord-Green Valley-Bartlett Springs fault zone is lower at about 5 mm/yr. In southern California, the San Andreas exhibits a slip rate of about 35 mm/yr along the Mojave section, decreasing to as low as 10-15 mm/yr along its juncture with the San Jacinto fault, and about 20 mm/yr in the Coachella Valley. The San Jacinto and Elsinore fault zones exhibit rates of about 15 and 5 mm/yr, respectively. The average recurrence interval for surface-rupturing earthquakes along individual elements of the San Andreas fault system range from 100-500 years and is consistent with slip rate at those sites: higher slip rates produce more frequent or larger earthquakes. There is also evidence of short-term variations in strain release (slip rate) along various fault sections, as expressed as “flurries” or clusters of earthquakes as well as periods of relatively fewer surface ruptures in these relatively short records. This

  7. 19. IV avati Y-galeriis Andreas W kureeritud näitus "Puudumise kohalolu : the presence of absence"

    Index Scriptorium Estoniae

    2005-01-01

    Osalevad kunstnikud Kaisa Eiche, Toomas Kalve, Alan Proosa, Maari Ross, Riho Peiker, Anna Hints, Siim Vahur, Katz, Alan Ross, Jaan Sokk, Andreas W, Taavi Piibemann ja Kalev Vapper on Tartu Kõrgemast Kunstikoolist või sellega seotud

  8. Loading of the San Andreas fault by flood-induced rupture of faults beneath the Salton Sea

    Science.gov (United States)

    Brothers, Daniel; Kilb, Debi; Luttrell, Karen; Driscoll, Neal W.; Kent, Graham

    2011-01-01

    The southern San Andreas fault has not experienced a large earthquake for approximately 300 years, yet the previous five earthquakes occurred at ~180-year intervals. Large strike-slip faults are often segmented by lateral stepover zones. Movement on smaller faults within a stepover zone could perturb the main fault segments and potentially trigger a large earthquake. The southern San Andreas fault terminates in an extensional stepover zone beneath the Salton Sea—a lake that has experienced periodic flooding and desiccation since the late Holocene. Here we reconstruct the magnitude and timing of fault activity beneath the Salton Sea over several earthquake cycles. We observe coincident timing between flooding events, stepover fault displacement and ruptures on the San Andreas fault. Using Coulomb stress models, we show that the combined effect of lake loading, stepover fault movement and increased pore pressure could increase stress on the southern San Andreas fault to levels sufficient to induce failure. We conclude that rupture of the stepover faults, caused by periodic flooding of the palaeo-Salton Sea and by tectonic forcing, had the potential to trigger earthquake rupture on the southern San Andreas fault. Extensional stepover zones are highly susceptible to rapid stress loading and thus the Salton Sea may be a nucleation point for large ruptures on the southern San Andreas fault.

  9. Slip in the 1857 and earlier large earthquakes along the Carrizo Plain, San Andreas Fault.

    Science.gov (United States)

    Zielke, Olaf; Arrowsmith, J Ramón; Grant Ludwig, Lisa; Akçiz, Sinan O

    2010-02-26

    The moment magnitude (Mw) 7.9 Fort Tejon earthquake of 1857, with a approximately 350-kilometer-long surface rupture, was the most recent major earthquake along the south-central San Andreas Fault, California. Based on previous measurements of its surface slip distribution, rupture along the approximately 60-kilometer-long Carrizo segment was thought to control the recurrence of 1857-like earthquakes. New high-resolution topographic data show that the average slip along the Carrizo segment during the 1857 event was 5.3 +/- 1.4 meters, eliminating the core assumption for a linkage between Carrizo segment rupture and recurrence of major earthquakes along the south-central San Andreas Fault. Earthquake slip along the Carrizo segment may recur in earthquake clusters with cumulative slip of approximately 5 meters.

  10. Strain on the san andreas fault near palmdale, california: rapid, aseismic change.

    Science.gov (United States)

    Savage, J C; Prescott, W H; Lisowski, M; King, N E

    1981-01-02

    Frequently repeated strain measurements near Palmdale, California, during the period from 1971 through 1980 indicate that, in addition to a uniform accumulation of right-lateral shear strain (engineering shear, 0.35 microradian per year) across the San Andreas fault, a 1-microstrain contraction perpendicular to the fault that accumulated gradually during the interval 1974 through 1978 was aseismically released between February and November 1979. Subsequently (November 1979 to March 1980), about half of the contraction was recovered. This sequence of strain changes can be explained in terms of south-southwestward migration of a slip event consisting of the south-southwestward movement of the upper crust on a horizontal detachment surface at a depth of 10 to 30 kilometers. The large strain change in 1979 corresponds to the passage of the slip event beneath the San Andreas fault.

  11. 11th June 2009-Cyprus-Minister of Education and Culture H. E. Prof. Andreas Demetriou

    CERN Multimedia

    Maximilien Brice

    2009-01-01

    Tirage 1 :CERN Director-General, R. Heuer and Minister of Education and Culture, H. E. Prof. Andreas Demetriou; Tirage 2:Council President,T. Åkesson, Ecole Normale Supérieure,K. Kounnas, Chairman of the Cyprus CERN Committee,C. N. Papanicolas, R. Heuer,A. Demetriou, Permanent Representative of the Republic of Cyprus in Geneva,A. Hadjichrysanthou, Directorate Office,E. Tsesmelis

  12. The morphology of strike-slip faults - Examples from the San Andreas Fault, California

    Science.gov (United States)

    Bilham, Roger; King, Geoffrey

    1989-01-01

    The dilatational strains associated with vertical faults embedded in a horizontal plate are examined in the framework of fault kinematics and simple displacement boundary conditions. Using boundary element methods, a sequence of examples of dilatational strain fields associated with commonly occurring strike-slip fault zone features (bends, offsets, finite rupture lengths, and nonuniform slip distributions) is derived. The combinations of these strain fields are then used to examine the Parkfield region of the San Andreas fault system in central California.

  13. Electrical resistivity variations associated with earthquakes on the san andreas fault.

    Science.gov (United States)

    Mazzella, A; Morrison, H F

    1974-09-06

    A 24 percent precursory change in apparent electrical resistivity was observed before a magnitude 3.9 earthquake of strike-slip nature on the San Andreas fault in central California. The experimental configuration and numerical calculations suggest that the change is associated with a volume at depth rather than some near-surface phenomenon. The character and duration of the precursor period agree well with those of other earthquake studies and support a dilatant earthquake mechanism model.

  14. Correlation of data on strain accumulation adjacent to the San Andreas Fault with available models

    Science.gov (United States)

    Turcotte, Donald L.

    1986-01-01

    Theoretical and numerical studies of deformation on strike slip faults were performed and the results applied to geodetic observations performed in the vicinity of the San Andreas Fault in California. The initial efforts were devoted to an extensive series of finite element calculations of the deformation associated with cyclic displacements on a strike-slip fault. Measurements of strain accumulation adjacent to the San Andreas Fault indicate that the zone of strain accumulation extends only a few tens of kilometers away from the fault. There is a concern about the tendency to make geodetic observations along the line to the source. This technique has serious problems for strike slip faults since the vector velocity is also along the fault. Use of a series of stations lying perpendicular to the fault whose positions are measured relative to a reference station are suggested to correct the problem. The complexity of faulting adjacent to the San Andreas Fault indicated that the homogeneous elastic and viscoelastic approach to deformation had serious limitations. These limitation led to the proposal of an approach that assumes a fault is composed of a distribution of asperities and barriers on all scales. Thus, an earthquake on a fault is treated as a failure of a fractal tree. Work continued on the development of a fractal based model for deformation in the western United States. In order to better understand the distribution of seismicity on the San Andreas Fault system a fractal analog was developed. The fractal concept also provides a means of testing whether clustering in time or space is a scale-invariant process.

  15. Migrating tremors illuminate complex deformation beneath the seismogenic San Andreas fault.

    Science.gov (United States)

    Shelly, David R

    2010-02-04

    The San Andreas fault is one of the most extensively studied faults in the world, yet its physical character and deformation mode beneath the relatively shallow earthquake-generating portion remain largely unconstrained. Tectonic 'non-volcanic' tremor, a recently discovered seismic signal probably generated by shear slip on the deep extension of some major faults, can provide new insight into the deep fate of such faults, including that of the San Andreas fault near Parkfield, California. Here I examine continuous seismic data from mid-2001 to 2008, identifying tremor and decomposing the signal into different families of activity based on the shape and timing of the waveforms at multiple stations. This approach allows differentiation between activities from nearby patches of the deep fault and begins to unveil rich and complex patterns of tremor occurrence. I find that tremor exhibits nearly continuous migration, with the most extensive episodes propagating more than 20 kilometres along fault strike at rates of 15-80 kilometres per hour. This suggests that the San Andreas fault remains a localized through-going structure, at least to the base of the crust, in this area. Tremor rates and recurrence behaviour changed markedly in the wake of the 2004 magnitude-6.0 Parkfield earthquake, but these changes were far from uniform within the tremor zone, probably reflecting heterogeneous fault properties and static and dynamic stresses decaying away from the rupture. The systematic recurrence of tremor demonstrated here suggests the potential to monitor detailed time-varying deformation on this portion of the deep San Andreas fault, deformation which unsteadily loads the shallower zone that last ruptured in the 1857 magnitude-7.9 Fort Tejon earthquake.

  16. A case for historic joint rupture of the San Andreas and San Jacinto faults.

    Science.gov (United States)

    Lozos, Julian C

    2016-03-01

    The San Andreas fault is considered to be the primary plate boundary fault in southern California and the most likely fault to produce a major earthquake. I use dynamic rupture modeling to show that the San Jacinto fault is capable of rupturing along with the San Andreas in a single earthquake, and interpret these results along with existing paleoseismic data and historic damage reports to suggest that this has likely occurred in the historic past. In particular, I find that paleoseismic data and historic observations for the ~M7.5 earthquake of 8 December 1812 are best explained by a rupture that begins on the San Jacinto fault and propagates onto the San Andreas fault. This precedent carries the implications that similar joint ruptures are possible in the future and that the San Jacinto fault plays a more significant role in seismic hazard in southern California than previously considered. My work also shows how physics-based modeling can be used for interpreting paleoseismic data sets and understanding prehistoric fault behavior.

  17. The Eastern California Shear Zone as the northward extension of the southern San Andreas Fault

    Science.gov (United States)

    Thatcher, Wayne R.; Savage, James C.; Simpson, Robert W.

    2016-01-01

    Cluster analysis offers an agnostic way to organize and explore features of the current GPS velocity field without reference to geologic information or physical models using information only contained in the velocity field itself. We have used cluster analysis of the Southern California Global Positioning System (GPS) velocity field to determine the partitioning of Pacific-North America relative motion onto major regional faults. Our results indicate the large-scale kinematics of the region is best described with two boundaries of high velocity gradient, one centered on the Coachella section of the San Andreas Fault and the Eastern California Shear Zone and the other defined by the San Jacinto Fault south of Cajon Pass and the San Andreas Fault farther north. The ~120 km long strand of the San Andreas between Cajon Pass and Coachella Valley (often termed the San Bernardino and San Gorgonio sections) is thus currently of secondary importance and carries lesser amounts of slip over most or all of its length. We show these first order results are present in maps of the smoothed GPS velocity field itself. They are also generally consistent with currently available, loosely bounded geologic and geodetic fault slip rate estimates that alone do not provide useful constraints on the large-scale partitioning we show here. Our analysis does not preclude the existence of smaller blocks and more block boundaries in Southern California. However, attempts to identify smaller blocks along and adjacent to the San Gorgonio section were not successful.

  18. A case for historic joint rupture of the San Andreas and San Jacinto faults

    Science.gov (United States)

    Lozos, Julian C.

    2016-01-01

    The San Andreas fault is considered to be the primary plate boundary fault in southern California and the most likely fault to produce a major earthquake. I use dynamic rupture modeling to show that the San Jacinto fault is capable of rupturing along with the San Andreas in a single earthquake, and interpret these results along with existing paleoseismic data and historic damage reports to suggest that this has likely occurred in the historic past. In particular, I find that paleoseismic data and historic observations for the ~M7.5 earthquake of 8 December 1812 are best explained by a rupture that begins on the San Jacinto fault and propagates onto the San Andreas fault. This precedent carries the implications that similar joint ruptures are possible in the future and that the San Jacinto fault plays a more significant role in seismic hazard in southern California than previously considered. My work also shows how physics-based modeling can be used for interpreting paleoseismic data sets and understanding prehistoric fault behavior. PMID:27034977

  19. Language Ideas in the Teaching of Latin in the 17th and 18th Centuries. Rivalry between Vernacular Languages: Antoni Portella’s «Nou mètode per aprendre la llengua llatina»

    Directory of Open Access Journals (Sweden)

    Rosa Calafat Vila

    2017-11-01

    Full Text Available In 1764, Antoni Portella i Enric presented his book titled Nou methode per aprendre la llengua llatina. Primera part dels Rudiments (in English: A new method for learning Latin. Part one of the rudiments to the Palma Town Hall. The book exemplified Port-Royal dictates and the fashionable educational ideas of the 17th century; it was successfully used in Minorcan schools, but it did not catch on in Majorca. The fact that it was written in Catalan, a language that was commonly used on the smaller island subject to the Treaty of Utrecht, and competed with grammar books created by experts who questioned its adequacy, put it at the center of a debate on the methodology for teaching Latin, as was common across Europe in the 17th and 18th centuries, but with the addition of the conflict between the two vernacular languages, Catalan and Spanish. This work deals with the controversy of ideas about the Catalan, Spanish and Latin languages that was lived in the second half of the eighteenth century in Mallorca and Menorca in the field of education; as well as the grammatical works in use.

  20. The exploitation of heroic conventions in the OE poem Andreas: an artistic misconduct or a convincing blend of traditional literary concepts and new Christian ideas?

    Directory of Open Access Journals (Sweden)

    Alenka Divjak

    2012-12-01

    Full Text Available This paper examines the function of traditional heroic concepts, typical of the traditional military Germanic society, in the Christian environment of the Old English poem Andreas, whose indebtedness to the traditional heroic poetry has been generally recognised. The paper juxtaposes four examples of traditional heroic ethos from Beowulf, the most detailed example of heroic poetry, and the text to which Andreas is verbally and stylistically very close, with the relevant parallels from Andreas, in order to determine to what extent the traditional images relating to the life of traditional heroic society still retain in Andreas their traditional connotations and to what extent they are imbued with the new Christian meaning.

  1. Change in failure stress on the southern san andreas fault system caused by the 1992 magnitude = 7.4 landers earthquake.

    Science.gov (United States)

    Stein, R S; King, G C; Lin, J

    1992-11-20

    The 28 June Landers earthquake brought the San Andreas fault significantly closer to failure near San Bernardino, a site that has not sustained a large shock since 1812. Stress also increased on the San Jacinto fault near San Bernardino and on the San Andreas fault southeast of Palm Springs. Unless creep or moderate earthquakes relieve these stress changes, the next great earthquake on the southern San Andreas fault is likely to be advanced by one to two decades. In contrast, stress on the San Andreas north of Los Angeles dropped, potentially delaying the next great earthquake there by 2 to 10 years.

  2. Correlation between deep fluids, tremor and creep along the central San Andreas fault.

    Science.gov (United States)

    Becken, Michael; Ritter, Oliver; Bedrosian, Paul A; Weckmann, Ute

    2011-11-30

    The seismicity pattern along the San Andreas fault near Parkfield and Cholame, California, varies distinctly over a length of only fifty kilometres. Within the brittle crust, the presence of frictionally weak minerals, fault-weakening high fluid pressures and chemical weakening are considered possible causes of an anomalously weak fault northwest of Parkfield. Non-volcanic tremor from lower-crustal and upper-mantle depths is most pronounced about thirty kilometres southeast of Parkfield and is thought to be associated with high pore-fluid pressures at depth. Here we present geophysical evidence of fluids migrating into the creeping section of the San Andreas fault that seem to originate in the region of the uppermost mantle that also stimulates tremor, and evidence that along-strike variations in tremor activity and amplitude are related to strength variations in the lower crust and upper mantle. Interconnected fluids can explain a deep zone of anomalously low electrical resistivity that has been imaged by magnetotelluric data southwest of the Parkfield-Cholame segment. Near Cholame, where fluids seem to be trapped below a high-resistivity cap, tremor concentrates adjacent to the inferred fluids within a mechanically strong zone of high resistivity. By contrast, subvertical zones of low resistivity breach the entire crust near the drill hole of the San Andreas Fault Observatory at Depth, northwest of Parkfield, and imply pathways for deep fluids into the eastern fault block, coincident with a mechanically weak crust and the lower tremor amplitudes in the lower crust. Fluid influx to the fault system is consistent with hypotheses of fault-weakening high fluid pressures in the brittle crust.

  3. The Renaissance and the universal surgeon: Giovanni Andrea Della Croce, a master of traumatology

    OpenAIRE

    Di Matteo, Berardo; Tarabella, Vittorio; Filardo, Giuseppe; Viganò, Anna; Tomba, Patrizia; Marcacci, Maurilio

    2013-01-01

    All the medical knowledge of all time in one book, the universal and perfect manual for the Renaissance surgeon, and the man who wrote it. This paper depicts the life and works of Giovanni Andrea della Croce, a 16th Century physician and surgeon, who, endowed with true spirit of Renaissance humanism, wanted to teach and share all his medical knowledge through his opus magnum, titled “Universal Surgery Complete with All the Relevant Parts for the Optimum Surgeon”. An extraordinary book which t...

  4. The Renaissance and the universal surgeon: Giovanni Andrea Della Croce, a master of traumatology.

    Science.gov (United States)

    Di Matteo, Berardo; Tarabella, Vittorio; Filardo, Giuseppe; Viganò, Anna; Tomba, Patrizia; Marcacci, Maurilio

    2013-12-01

    All the medical knowledge of all time in one book, the universal and perfect manual for the Renaissance surgeon, and the man who wrote it. This paper depicts the life and works of Giovanni Andrea della Croce, a 16th Century physician and surgeon, who, endowed with true spirit of Renaissance humanism, wanted to teach and share all his medical knowledge through his opus magnum, titled "Universal Surgery Complete with All the Relevant Parts for the Optimum Surgeon". An extraordinary book which truly represents a defining moment and a founding stone for traumatology, written by a lesser known historical personality, but nonetheless the Renaissance Master of Traumatology.

  5. Nick COULDRY et Andreas HEPP (2016), The Mediated Construction of Reality

    OpenAIRE

    Schneider, Élisabeth

    2018-01-01

    Comment peut-on penser aujourd’hui le caractère du monde social en partant du principe que le social se construit à partir et à travers des processus de médiation et les infrastructures de communication, en prenant en compte la complexité des interactions entre les êtres humains et leur environnement à la fois en ligne et hors ligne ? C’est à cette question que veulent répondre les auteurs, Nick Couldry et Andreas Hepp, tous deux sociologues des médias. Leurs perspectives et leurs ancrages th...

  6. Clerics and courtly love in Andreas Capellanus' The Art of Courtly Love and Chaucer's Canterbury Tales

    OpenAIRE

    Williams, Andrew

    1990-01-01

    In both The Canterbury Tales and The Art of Courtly Love Geoffrey Chaucer and Andreas Capellanus deal with various aspects of courtly love. In particular, both of them focus to some degree on the question of clerical celibacy. The use of tale telling and imaginary dialogues result in a contemporary overview of the role of the cleric in courtly love, the church rules on the subject, and the opinions of the people on a subject that is ripe for exploration. My aim is to point out some of the ...

  7. Sawtooth segmentation and deformation processes on the southern San Andreas fault, California

    Science.gov (United States)

    Bilham, R.; Williams, P.

    1985-01-01

    Five contiguous 12-13 km fault segments form a sawtooth geometry on the southernmost San Andreas fault. The kinematic and morphologic properties of each segment depend on fault strike, despite differences of strike between segments of as little as 3 degrees. Oblique slip (transpression) of fault segments within the Indio Hills, Mecca Hills and Durmid Hill results from an inferred 8:1 ratio of dextral slip to convergence across the fault zone. Triggered slip and creep are confined almost entirely to transpressive segments of the fault. Durmid Hill has been formed in the last 28 + or - 6 ka by uplift at an average rate of 3 + or - 1 mm/a.

  8. Impulsive radon emanation on a creeping segment of the San Andreas fault, California

    International Nuclear Information System (INIS)

    King, C.-Y.

    1984-01-01

    Radon emanation was continuously monitored for several months at two locations along a creeping segment of the San Andreas fault in central California. The recorded emanations showed several impulsive increases that lasted as much as five hours with amplitudes considerably larger than meteorologically induced diurnal variations. Some of the radon increases were accompanied or followed by earthquakes or fault-creep events. They were possibly the result of some sudden outbursts of relatively radon-rich ground gas, sometimes triggered by crustal deformation or vibration. (Auth.)

  9. The accommodation of relative motion at depth on the San Andreas fault system in California

    Science.gov (United States)

    Prescott, W. H.; Nur, A.

    1981-01-01

    Plate motion below the seismogenic layer along the San Andreas fault system in California is assumed to form by aseismic slip along a deeper extension of the fault or may result from lateral distribution of deformation below the seismogenic layer. The shallow depth of California earthquakes, the depth of the coseismic slip during the 1906 San Francisco earthquake, and the presence of widely separated parallel faults indicate that relative motion is distributed below the seismogenic zone, occurring by inelastic flow rather than by aseismic slip on discrete fault planes.

  10. Stress near geometrically complex strike-slip faults - Application to the San Andreas fault at Cajon Pass, southern California

    Science.gov (United States)

    Saucier, Francois; Humphreys, Eugene; Weldon, Ray, II

    1992-01-01

    A model is presented to rationalize the state of stress near a geometrically complex major strike-slip fault. Slip on such a fault creates residual stresses that, with the occurrence of several slip events, can dominate the stress field near the fault. The model is applied to the San Andreas fault near Cajon Pass. The results are consistent with the geological features, seismicity, the existence of left-lateral stress on the Cleghorn fault, and the in situ stress orientation in the scientific well, found to be sinistral when resolved on a plane parallel to the San Andreas fault. It is suggested that the creation of residual stresses caused by slip on a wiggle San Andreas fault is the dominating process there.

  11. Lack of continuity of the San Andreas Fault in southern California: Three-dimensional fault models and earthquake scenarios

    Science.gov (United States)

    Carena, Sara; Suppe, John; Kao, Honn

    2004-04-01

    The 1200-km-long San Andreas Fault loses its apparent continuity in southern California near San Gorgonio Pass [, 1957], which raises significant questions given the dominant role of this fault in active California tectonics. What is the fundamental three-dimensional (3-D) geometry and kinematic behavior of the San Andreas fault system in this complex region? Is a throughgoing, if complex, San Andreas rupture from the Mojave Desert to the Coachella Valley possible? We have explored the issue of 3-D continuity by mapping over 60 faults in this region to depths of 15-20 km from hypocenter locations and focal mechanisms. We were able to constrain the 3-D geometry of the San Andreas fault zone (SAF) near San Gorgonio Pass from the 3-D geometry of the fault network surrounding it. The most likely configuration is for the San Andreas Fault to merge into the shallow-dipping San Gorgonio Pass thrust northwest of Indio. We concluded that there is no direct continuity at present but rather a network of faults, and the only kind of rupture possible for the SAF in this region is a complex rupture, involving both strike-slip and reverse faulting. GPS measurements also suggest that despite the fact that large motions must have occurred in the past based on offset geologic markers, only minor motion is occurring today in this area. Applying our findings about the fault geometry, we explored several simple earthquake scenarios to determine the most favorable conditions for a throughgoing rupture of the San Andreas fault system from the Mojave Desert to the Coachella Valley.

  12. Andreas Friis’ rumudsmykning i Infosalen i universitetsbiblioteksbygningen på Nørre Allé i København

    DEFF Research Database (Denmark)

    Schlichtkrull, Torsten

    2016-01-01

    Artiklen belyser tilblivelsen af Andreas Friis' rumudsmykning i Infosalen i universitetsbygningen på Nørre Allé i København. Baggrundsmaterialet stammer fra såvel trykte kilder inkl. avisartikler som arkivalier, herunder breve fra kunstneren til overbibliotekar Sven Dahl.......Artiklen belyser tilblivelsen af Andreas Friis' rumudsmykning i Infosalen i universitetsbygningen på Nørre Allé i København. Baggrundsmaterialet stammer fra såvel trykte kilder inkl. avisartikler som arkivalier, herunder breve fra kunstneren til overbibliotekar Sven Dahl....

  13. Mechanical insights into tectonic reorganization of the southern San Andreas fault system at ca. 1.1-1.5 Ma

    Science.gov (United States)

    Fattaruso, L.; Cooke, M. L.; Dorsey, R. J.

    2013-12-01

    Reorganization of active fault systems may result from changes in relative plate motion and evolving fault geometries. Between ~1.5 and 1.1 Ma the southern San Andreas fault system underwent a major reorganization that included initiation of the San Jacinto fault zone, termination of slip on the extensional West Salton detachment fault, and reorganization of structures in the Mecca Hills northeast of the San Andreas fault during a local change from transtension to transpression conditions with no known change in Pacific-North America relative plate motion. The active trace of the southern San Andreas fault itself also evolved during this time, with shifts in activity from the Mission Creek to Mill Creek to the present-day active fault geometry of the San Bernardino, Garnet Hill, and Banning strands of the San Andreas fault. Although there is a rich geologic record of these changes, the mechanisms that controlled abandonment of active faults, initiation of new strands, and shifting loci of uplift are poorly understood. We use three-dimensional mechanical Boundary Element Method models to investigate this major tectonic reorganization at ~1.1-1.5 Ma. Previous mechanical modeling studies have examined the evolution of the southern San Andreas fault geometry in the San Gorgonio Pass using a series of snapshot models of the succession of active fault geometries. We use the same approach to explore the role of fault interaction and tectonic loading in abandonment of the West Salton detachment fault and initiation of the San Jacinto fault. The snapshots include: (1) regional transtension with an active West Salton detachment fault and active Mission Creek strand of the San Andreas fault; (2) cessation of local extension in combination with initiation of the San Jacinto fault in which we explore both north-to-south propagation and simultaneous growth; (3) shift of activity to the Mill Creek strand of the San Andreas fault; and (4) shift of activity to the present

  14. Evolution of the northern santa cruz mountains by advection of crust past a san andreas fault bend.

    Science.gov (United States)

    Anderson, R S

    1990-07-27

    The late Quaternary marine terraces near Santa Cruz, California, reflect uplift associated with the nearby restraining bend on the San Andreas fault. Excellent correspondence of the coseismic vertical displacement field caused by the 17 October 1989 magnitude 7.1 Loma Prieta earthquake and the present elevations of these terraces allows calculation of maximum long-term uplift rates 1 to 2 kilometers west of the San Andreas fault of 0.8 millimeters per year. Over several million years, this uplift, in concert with the right lateral translation of the resulting topography, and with continual attack by geomorphic processes, can account for the general topography of the northern Santa Cruz Mountains.

  15. Andrea’s disease (angiomegaly): a currently well-defined nosological entitys.

    Science.gov (United States)

    Taurone, S; Spoletini, M; Di Matteo, F M; Mele, R; Tromba, L; Grippaudo, F R; Minni, A; Artico, M

    2017-01-01

    In 1997 D’Andrea et al. described a new nosological entity the characteristics of which consisted of lengthening, dilation and tortuosity of blood vessels, arteries or veins, less prominent, but also less circumscribed than an aneurysm. This condition does not necessarily imply specific aneurysm formation although aneurysms at multiple sites are a frequent observation. The term used by authors for angiomegaly of the venous system was venomegaly and the analogous condition of the arterial system was termed arteriomegaly. Although tortuosity and dilation of arteries and veins have been widely reported, suggesting a systemic disorder which affects the structural integrity of all vessels, most papers dealing with this intriguing condition did not describe any alterations in the components of vessel walls. In the present paper, the authors describe a well-defined condition, D’Andrea’s Disease (or DD, in this article), analyzing its salient morphological and clinical features and clarifying this pathological condition as a distinct and now well-defined nosological entity.

  16. Tremor-tide correlations and near-lithostatic pore pressure on the deep San Andreas fault.

    Science.gov (United States)

    Thomas, Amanda M; Nadeau, Robert M; Bürgmann, Roland

    2009-12-24

    Since its initial discovery nearly a decade ago, non-volcanic tremor has provided information about a region of the Earth that was previously thought incapable of generating seismic radiation. A thorough explanation of the geologic process responsible for tremor generation has, however, yet to be determined. Owing to their location at the plate interface, temporal correlation with geodetically measured slow-slip events and dominant shear wave energy, tremor observations in southwest Japan have been interpreted as a superposition of many low-frequency earthquakes that represent slip on a fault surface. Fluids may also be fundamental to the failure process in subduction zone environments, as teleseismic and tidal modulation of tremor in Cascadia and Japan and high Poisson ratios in both source regions are indicative of pressurized pore fluids. Here we identify a robust correlation between extremely small, tidally induced shear stress parallel to the San Andreas fault and non-volcanic tremor activity near Parkfield, California. We suggest that this tremor represents shear failure on a critically stressed fault in the presence of near-lithostatic pore pressure. There are a number of similarities between tremor in subduction zone environments, such as Cascadia and Japan, and tremor on the deep San Andreas transform, suggesting that the results presented here may also be applicable in other tectonic settings.

  17. Crustal Density Variation Along the San Andreas Fault Controls Its Secondary Faults Distribution and Dip Direction

    Science.gov (United States)

    Yang, H.; Moresi, L. N.

    2017-12-01

    The San Andreas fault forms a dominant component of the transform boundary between the Pacific and the North American plate. The density and strength of the complex accretionary margin is very heterogeneous. Based on the density structure of the lithosphere in the SW United States, we utilize the 3D finite element thermomechanical, viscoplastic model (Underworld2) to simulate deformation in the San Andreas Fault system. The purpose of the model is to examine the role of a big bend in the existing geometry. In particular, the big bend of the fault is an initial condition of in our model. We first test the strength of the fault by comparing the surface principle stresses from our numerical model with the in situ tectonic stress. The best fit model indicates the model with extremely weak fault (friction coefficient 200 kg/m3) than surrounding blocks. In contrast, the Mojave block is detected to find that it has lost its mafic lower crust by other geophysical surveys. Our model indicates strong strain localization at the jointer boundary between two blocks, which is an analogue for the Garlock fault. High density lower crust material of the Great Valley tends to under-thrust beneath the Transverse Range near the big bend. This motion is likely to rotate the fault plane from the initial vertical direction to dip to the southwest. For the straight section, north to the big bend, the fault is nearly vertical. The geometry of the fault plane is consistent with field observations.

  18. Simulations of tremor-related creep reveal a weak crustal root of the San Andreas Fault

    Science.gov (United States)

    Shelly, David R.; Bradley, Andrew M.; Johnson, Kaj M.

    2013-01-01

    Deep aseismic roots of faults play a critical role in transferring tectonic loads to shallower, brittle crustal faults that rupture in large earthquakes. Yet, until the recent discovery of deep tremor and creep, direct inference of the physical properties of lower-crustal fault roots has remained elusive. Observations of tremor near Parkfield, CA provide the first evidence for present-day localized slip on the deep extension of the San Andreas Fault and triggered transient creep events. We develop numerical simulations of fault slip to show that the spatiotemporal evolution of triggered tremor near Parkfield is consistent with triggered fault creep governed by laboratory-derived friction laws between depths of 20–35 km on the fault. Simulated creep and observed tremor northwest of Parkfield nearly ceased for 20–30 days in response to small coseismic stress changes of order 104 Pa from the 2003 M6.5 San Simeon Earthquake. Simulated afterslip and observed tremor following the 2004 M6.0 Parkfield earthquake show a coseismically induced pulse of rapid creep and tremor lasting for 1 day followed by a longer 30 day period of sustained accelerated rates due to propagation of shallow afterslip into the lower crust. These creep responses require very low effective normal stress of ~1 MPa on the deep San Andreas Fault and near-neutral-stability frictional properties expected for gabbroic lower-crustal rock.

  19. La capacidad prospectiva y de visualización del escáner láser 3D aplicado al plan de conservación preventiva del conjunto cerámico, piedra y hierro de Antoni Gaudí y Josep María Jujol en la catedral gótica de Mallorca

    Directory of Open Access Journals (Sweden)

    Juan Antonio Ruiz

    2012-05-01

    Full Text Available In this work it is presented the prospective and visualization efficiency of the 3D laser scanner as a tool applied to the elaboration of a preventive conservation plan of the ceramic done by Antoni Gaudí and Josep Maria Jujol in the gothic cathedral of Mallorca .The usage of this technique has enabled its investigation regarding digital information storage and metrology of the whole surface and plastic elements in it. This ways it is determined the creation of a multidisciplinary and interactive database with documental, technical and prescriptive content in order to compose the preventive conservation plan.

  20. Andreas Ruby

    OpenAIRE

    De Ferrari,Felipe; Courreges,Kim

    2010-01-01

    Durante 2009 y después de tres años de operación, 0300TV tomó la forma de una editorial independiente dedicada a la arquitectura, que opera con registros audiovisuales, publicaciones, textos críticos, investigaciones, exposiciones y conferencias. Siendo actualmente dirigida por Felipe De Ferrari y Diego Grass, su compromiso con la disciplina los ha llevado a asumir encargos de distinto alcance y escala. Han realizado más de sesenta entrevistas inéditas, concentrándose en arquitectos que parti...

  1. Giovanni e Arturo: stranieri a L.A. Una lettura di Andrea De Carlo e John Fante

    Directory of Open Access Journals (Sweden)

    Silvia La Regina

    2005-12-01

    Full Text Available Este trabalho analisa a tetralogia de Arturo Bandini, escrita pelo ítalo-americano John Fante, em paralelo com o romance Treno di panna, de Andrea De Carlo, examinando a relação dos respectivos protagonista com o fato de serem estrangeiros, numa dialética modernidade/pós-modernidade.

  2. A critical evaluation of crustal dehydration as the cause of an overpressured and weak San Andreas Fault

    Science.gov (United States)

    Fulton, P.M.; Saffer, D.M.; Bekins, B.A.

    2009-01-01

    Many plate boundary faults, including the San Andreas Fault, appear to slip at unexpectedly low shear stress. One long-standing explanation for a "weak" San Andreas Fault is that fluid release by dehydration reactions during regional metamorphism generates elevated fluid pressures that are localized within the fault, reducing the effective normal stress. We evaluate this hypothesis by calculating realistic fluid production rates for the San Andreas Fault system, and incorporating them into 2-D fluid flow models. Our results show that for a wide range of permeability distributions, fluid sources from crustal dehydration are too small and short-lived to generate, sustain, or localize fluid pressures in the fault sufficient to explain its apparent mechanical weakness. This suggests that alternative mechanisms, possibly acting locally within the fault zone, such as shear compaction or thermal pressurization, may be necessary to explain a weak San Andreas Fault. More generally, our results demonstrate the difficulty of localizing large fluid pressures generated by regional processes within near-vertical fault zones. ?? 2009 Elsevier B.V.

  3. Fault rocks from the SAFOD core samples : implications for weakening at shallow depths along the San Andreas Fault, California

    NARCIS (Netherlands)

    Holdsworth, R.E.; van Diggelen, E.W.E.; Spiers, C.J.; Bresser, J.H.P. de; Walker, R.J.; Bown, L.

    2011-01-01

    The drilling of a deep borehole across the actively creeping Parkfield segment of the San Andreas Fault Zone (SAFZ), California, and collection of core materials permit direct geological study of fault zone processes at 2–3 km depth. The three drill cores sample both host and fault rocks and pass

  4. Holocene Geologic Slip Rate for the Banning Strand of the Southern San Andreas Fault near San Gorgonio Pass, Southern California

    Science.gov (United States)

    Gold, P. O.; Behr, W. M.; Rood, D. H.; Kendrick, K. J.; Rockwell, T. K.; Sharp, W. D.

    2014-12-01

    We present the first Holocene geologic slip rate for the Banning strand of the southern San Andreas Fault in southern California. The southern San Andreas Fault splays into the sub-parallel Banning and Mission Creek strands in the northwestern Coachella Valley, and although it has long been surmised that the Banning strand eventually accommodates the majority of displacement and transfers it into San Gorgonio Pass, until now it has been uncertain how slip is actually partitioned between these two fault strands. Our new slip rate measurement, critically located at the northwestern end of the Banning strand, overlaps within errors with the published rate for the southern San Andreas Fault measured at Biskra Palms Oasis. This indicates that the majority of southern San Andreas Fault displacement transfers from the southeastern Mission Creek strand northwest to the Banning strand and into San Gorgonio Pass. Our result corroborates the UCERF3 hazard model, and is consistent with most previous interpretations of how slip is partitioned between the Banning and Mission Creek fault strands. To measure this slip rate, we used B4 airborne LiDAR to identify the apex of an alluvial fan offset laterally 30 ± 5 m from its source. We calculated the depositional age of the fan using 10Be in-situ cosmogenic exposure dating of 5 cobbles and a depth profile. We calculated a most probable fan age of 4.0 +2.0/-1.6 ka (1σ) by combining the inheritance-corrected cobble ages assuming Gaussian uncertainty. However, the probability density function yielded a multi-peaked distribution, which we attribute to variable 10Be inheritance in the cobbles, so we favor the depth profile age of 2.2-3.6 ka. Combined, these measurements yield a late Holocene slip rate for the Banning strand of the southern San Andreas Fault of 11.1 +3.1/-3.3 mm/yr. This slip rate does not preclude possibility that some slip transfers north along the Mission Creek strand and the Garnet Hill fault, but it does confirm

  5. A Three-Dimensional Numerical Investigation of San Andreas Fault Configuration Through the San Gorgonio Pass

    Science.gov (United States)

    Dair, L.; Cooke, M.

    2007-12-01

    The partitioning of deformation among strands of the San Andreas Fault through the San Gorgonio pass depends on fault geometry. We investigate three alternative three-dimensional configurations of the San Andreas Fault to explore the influence of fault geometry on uplift patterns and slip rates. One model has the commonly used vertical geometry for the system. Another uses the Southern California Earthquake Center Community Fault Model to include two north-dipping, discontinuous, alternative stands. We developed a third model that smoothly connects the north-dipping faults to adjacent segments. Regional transform loading is applied as slip at the distal edges of a deep detachment as well as along the distal portions of the primary fault segments. The model with vertical faults fails to produce uplift in the San Bernardino Mountains. Both of the north-dipping models produce significant uplift that may correspond to observations of recent uplift in the San Bernardino Mountains (Spotila et al, 1998). The vertical model has faster strike-slip rates while the north-dipping, discontinuous system has the slowest strike-slip rates. While the vertical model has the greatest net slip and more efficiently transmits deformation through the pass, the north-dipping fault configurations better match uplift patterns. We altered the continuous and north-dipping model to explore the effects of slip partitioning among the San Andreas and San Jacinto faults and secondary faults to the model. Debate continues about the slip partitioning between the Coachella Valley segment of the SAF and the San Jacinto fault. Our study suggests that slip portioning between the two faults has less of an effect on the slip rates and off fault deformation than fault geometry. The addition of secondary faults to the model significantly increases uplift in the northern San Bernardino Mountains. The senses of slip along secondary faults in the model are consistent with geologic observations. Continuing

  6. Geophysical Characterization of Groundwater-Fault Dynamics at San Andreas Oasis

    Science.gov (United States)

    Faherty, D.; Polet, J.; Osborn, S. G.

    2017-12-01

    The San Andreas Oasis has historically provided a reliable source of fresh water near the northeast margin of the Salton Sea, although since the recent completion of the Coachella Canal Lining Project and persistent drought in California, surface water at the site has begun to disappear. This may be an effect of the canal lining, however, the controls on groundwater are complicated by the presence of the Hidden Springs Fault (HSF), a northeast dipping normal fault that trends near the San Andreas Oasis. Its surface expression is apparent as a lineation against which all plant growth terminates, suggesting that it may form a partial barrier to subsurface groundwater flow. Numerous environmental studies have detailed the chemical evolution of waters resources at San Andreas Spring, although there remains a knowledge gap on the HSF and its relation to groundwater at the site. To better constrain flow paths and characterize groundwater-fault interactions, we have employed resistivity surveys near the surface trace of the HSF to generate profiles of lateral and depth-dependent variations in resistivity. The survey design is comprised of lines installed in Wenner Arrays, using an IRIS Syscal Kid, with 24 electrodes, at a maximum electrode spacing of 5 meters. In addition, we have gathered constraints on the geometry of the HSF using a combination of ground-based magnetic and gravity profiles, conducted with a GEM walking Proton Precession magnetometer and a Lacoste & Romberg gravimeter. Seventeen gravity measurements were acquired across the surface trace of the fault. Preliminary resistivity results depict a shallow conductor localized at the oasis and discontinuous across the HSF. Magnetic data reveal a large contrast in subsurface magnetic susceptibility that appears coincident with the surface trace and trend of the HSF, while gravity data suggests a shallow, relatively high density anomaly centered near the oasis. These data also hint at a second, previously

  7. Andreas Vesalius as a renaissance innovative neuroanatomist: his 5th centenary of birth.

    Science.gov (United States)

    Gomes, Marleide da Mota; Moscovici, Mauricio; Engelhardt, Eliasz

    2015-02-01

    Andreas Vesalius (1514-1564) is considered the Father of Modern Anatomy, and an authentic representative of the Renaissance. His studies, founded on dissection of human bodies, differed from Galeno, who based his work on dissection of animals, constituted a notable scientific advance. Putting together science and art, Vesalius associated himself to artists of the Renaissance, and valued the images of the human body in his superb work De Humani Corporis Fabrica.This paper aims to honor this extraordinary European Renaissance physician and anatomist, who used aesthetic appeal to bind text and illustration, science and art. His achievements are highlighted, with an especial attention on neuroanatomy. Aspects about his personal life and career are also focused.

  8. Andreas Vesalius as a renaissance innovative neuroanatomist: his 5th centenary of birth

    Directory of Open Access Journals (Sweden)

    Marleide da Mota Gomes

    2015-02-01

    Full Text Available Andreas Vesalius (1514-1564 is considered the Father of Modern Anatomy, and an authentic representative of the Renaissance. His studies, founded on dissection of human bodies, differed from Galeno, who based his work on dissection of animals, constituted a notable scientific advance. Putting together science and art, Vesalius associated himself to artists of the Renaissance, and valued the images of the human body in his superb work De Humani Corporis Fabrica.This paper aims to honor this extraordinary European Renaissance physician and anatomist, who used aesthetic appeal to bind text and illustration, science and art. His achievements are highlighted, with an especial attention on neuroanatomy. Aspects about his personal life and career are also focused.

  9. Reviews by Barbara Santini, Andrea Mecacci, Mariagrazia Portera, Francesca Zugno, and Alberto Ricci

    Directory of Open Access Journals (Sweden)

    Fausto Cercignani

    2014-06-01

    Full Text Available Review of Daniele Goldoni’s book Gratitudine. Voci di Hölderlin (2013, by Barbara Santini. Review of Laura Anna Macor’s book La fragilità delle virtù. Dall’antropologia alla morale e ritorno nell’epoca di Kant (2011, by Andrea Mecacci. Review of the collection of essays Friedrich Hölderlin. Pensiero e poesia, ed. by Elena Polledri (special volume of the journal «Humanitas», 2012, by Mariagrazia Portera. Review of Barbara Santini’s book Soggetto e fondamento in Hölderlin tra filosofia trascendentale e pensiero speculativo (2013, by Francesca Zugno. Review of Francesca Zugno’s book Hölderlin oltre Kant. Verso Hyperion. 1794-1797 (2011, by Alberto Ricci.

  10. ANDREA 2.2 and 2.3. Advances in modelling of VVER cores

    Energy Technology Data Exchange (ETDEWEB)

    Havluj, Frantisek; Hejzlar, Jonatan; Vocka, Radim; Vysoudil, Jiri [UJV Rez, Husinec-Rez (Czech Republic)

    2017-09-15

    In 2016 a new version of code ANDREA for core design and reload safety analysis of VVER reactors has been released. The new code version includes several major improvements. The first of them is a seamless incorporation of short time kinetics calculations (without temperature feedback) into the code. This new feature accompanied by the possibility of excore detector signal predictions enables precise interpretation of dynamic measurements of control assembly weight during the reactor startup. Second important enhancement resides in new flexible format of cross section libraries and in new fuel temperature model based on results of TRANSURANUS fuel performance code. The new code version has been thoroughly tested and validated for both VVER440 and VVER-1000 reactors. Furthermore for the new version 2.3 which is to be released shortly we have implemented the possibility of fluent control assemblies' motion and of non-equidistant axial nodalization schemes in VVER-440 calculations.

  11. Prejudice and science: the attack of Pietro Andrea against Amatus Lusitanus

    Directory of Open Access Journals (Sweden)

    Antônio Guimarães Pinto

    2016-08-01

    Full Text Available Our aim in this article was to show how religious and racial prejudice, in partnership with an oversized academic arrogance, were able to undermine any sense of fairness even in fields pertaining to those sciences more apparently free from ideological or nationalistic motivations. Having just finished a translation of a Latin Apologia, written by the Italian botanist and physician Pietro Andrea Mattioli against his Portuguese contemporary and colleague Amatus Lusitanus, we approached this matter from a literary and cultural point of view, trying to demonstrate the absence of scientific integrity and moral ground of Mattioli’s attack, through which this man of science almost destroyed the professional career and possibly tried to put an end to the physical existence of his Hebrew‑Portuguese peer.

  12. Ruptures of the San Andreas fault system in San Gorgonio Pass

    Science.gov (United States)

    Yule, D.; Sieh, K. E.

    2010-12-01

    Fault behavior models for the San Andreas fault system in San Gorgonio Pass hinge upon contrasting interpretations of the structural complexity and diffuse seismicity in the Pass region. One model maintains that the fault system can rupture through the Pass in ~ M 7.8 earthquakes that extend from the Salton Sea to the Mojave Desert. Another model argues that the structural complexity here arrests San Andreas ruptures as they approach from either side of the Pass and limits their size to ~ M 7.5. One way to test these models is to examine the paleoseismic record of active faults in the Pass. Work at the Burro Flats site, located where the San Bernardino strand feeds into San Gorgonio Pass from the north, reveals evidence for at least nine earthquakes in the last 2000 yrs. The average earthquake recurrence is about 200 yrs with the maximum and minimum intervals between earthquakes equal to about 550 and 80 yrs, respectively. The average recurrence is considered to be a maximum value because a hiatus in sedimentation during the Early Middle Ages may ‘hide’ one or more event during this time period. The maximum recurrence interval of 550 yrs is likely an overestimate owing to the large errors in the timing of one event ~1300 yrs ago. In general, the Burro Flats event record and average recurrence is very similar to those at sites in the San Bernardino and Coachella Valley regions. The most recent rupture at Burro Flats cuts strata that contain European-introduced pollen and is interpreted to record the southeastern extent of the 1812 Wrightwood earthquake, a possible example of a ‘Pass-as-a-barrier’, moderate-sized event. The timing of pre-1812 events at Burro Flats correlate with the timing of San Andreas events in the San Bernardino and Coachella Valley regions, possible examples of through going, larger-sized earthquakes. Work at the Cabezon site, located on a thrust segment of the San Gorgonio Pass fault zone, shows evidence for two ruptures since ~ AD 1300

  13. Review Essay: Faltering Forms Go to School. Analysis of the Subject in Connection With Andreas Reckwitz

    Directory of Open Access Journals (Sweden)

    Johannes Twardella

    2009-03-01

    Full Text Available In his book "Subjectivity," Andreas RECKWITZ interprets the work of a series of structuralist and poststructuralist authors in relation to the analysis of subjectivity. In the following article I reconstruct this interpretation and attempt to critically analyze the empirical explanatory power of these authors. An excerpt from the school routine of a German class is used to show how these various "subject-theoretical analysis strategies" may lead to different, interesting, and insightful interpretations. It also becomes clear that the idea of subjectivity, and therefore of education and maturity, cannot be abandoned. Without this idea, the application of pedagogy would be cynical, and the ability to understand it impossible. URN: urn:nbn:de:0114-fqs090222

  14. Andreas Papandreou’s Exile Politics: The First Phase (1968-1970

    Directory of Open Access Journals (Sweden)

    Stan Draenos

    2014-12-01

    Full Text Available Andreas Papandreou’s exile politics, following his December 1967 release from Averoff Prison, have stereotypically been seen as simply adopting the neo-Marxist ideologies associated with the Third World national liberation movements of the era. In narrating the initial evolution of his views on the “Greek Question” in exile, this study attempts to surface the underlying dynamics responsible for radicalizing his politics in that direction. Those dynamics reflect, on the one hand, the relentless will-to-action informing Papandreou’s political persona and, on the other, the political upheavals, headlined by the protest movement against the US war in Vietnam, in which his politics were enmeshed.

  15. Tidal triggering of earthquakes suggests poroelastic behavior on the San Andreas Fault

    Science.gov (United States)

    Delorey, Andrew; Van Der Elst, Nicholas; Johnson, Paul

    2017-01-01

    Tidal triggering of earthquakes is hypothesized to provide quantitative information regarding the fault's stress state, poroelastic properties, and may be significant for our understanding of seismic hazard. To date, studies of regional or global earthquake catalogs have had only modest successes in identifying tidal triggering. We posit that the smallest events that may provide additional evidence of triggering go unidentified and thus we developed a technique to improve the identification of very small magnitude events. We identify events applying a method known as inter-station seismic coherence where we prioritize detection and discrimination over characterization. Here we show tidal triggering of earthquakes on the San Andreas Fault. We find the complex interaction of semi-diurnal and fortnightly tidal periods exposes both stress threshold and critical state behavior. Our findings reveal earthquake nucleation processes and pore pressure conditions – properties of faults that are difficult to measure, yet extremely important for characterizing earthquake physics and seismic hazards.

  16. Evidence for chaotic fault interactions in the seismicity of the San Andreas fault and Nankai trough

    Science.gov (United States)

    Huang, Jie; Turcotte, D. L.

    1990-01-01

    The dynamical behavior introduced by fault interactions is examined here using a simple spring-loaded, slider-block model with velocity-weakening friction. The model consists of two slider blocks coupled to each other and to a constant-velocity driver by elastic springs. For an asymmetric system in which the frictional forces on the two blocks are not equal, the solutions exhibit chaotic behavior. The system's behavior over a range of parameter values seems to be generally analogous to that of weakly coupled segments of an active fault. Similarities between the model simulations and observed patterns of seismicity on the south central San Andreas fault in California and in the Nankai trough along the coast of southwestern Japan.

  17. Steep-dip seismic imaging of the shallow San Andreas fault near Parkfield.

    Science.gov (United States)

    Hole, J A; Catchings, R D; St Clair, K C; Rymer, M J; Okaya, D A; Carney, B J

    2001-11-16

    Seismic reflection and refraction images illuminate the San Andreas Fault to a depth of 1 kilometer. The prestack depth-migrated reflection image contains near-vertical reflections aligned with the active fault trace. The fault is vertical in the upper 0.5 kilometer, then dips about 70 degrees to the southwest to at least 1 kilometer subsurface. This dip reconciles the difference between the computed locations of earthquakes and the surface fault trace. The seismic velocity cross section shows strong lateral variations. Relatively low velocity (10 to 30%), high electrical conductivity, and low density indicate a 1-kilometer-wide vertical wedge of porous sediment or fractured rock immediately southwest of the active fault trace.

  18. A 100-year average recurrence interval for the san andreas fault at wrightwood, california.

    Science.gov (United States)

    Fumal, T E; Schwartz, D P; Pezzopane, S K; Weldon, R J

    1993-01-08

    Evidence for five large earthquakes during the past five centuries along the San Andreas fault zone 70 kilometers northeast of Los Angeles, California, indicates that the average recurrence interval and the temporal variability are significantly smaller than previously thought. Rapid sedimentation during the past 5000 years in a 150-meter-wide structural depression has produced a greater than 21-meter-thick sequence of debris flow and stream deposits interbedded with more than 50 datable peat layers. Fault scarps, colluvial wedges, fissure infills, upward termination of ruptures, and tilted and folded deposits above listric faults provide evidence for large earthquakes that occurred in A.D. 1857, 1812, and about 1700, 1610, and 1470.

  19. Periodic, chaotic, and doubled earthquake recurrence intervals on the deep San Andreas fault.

    Science.gov (United States)

    Shelly, David R

    2010-06-11

    Earthquake recurrence histories may provide clues to the timing of future events, but long intervals between large events obscure full recurrence variability. In contrast, small earthquakes occur frequently, and recurrence intervals are quantifiable on a much shorter time scale. In this work, I examine an 8.5-year sequence of more than 900 recurring low-frequency earthquake bursts composing tremor beneath the San Andreas fault near Parkfield, California. These events exhibit tightly clustered recurrence intervals that, at times, oscillate between approximately 3 and approximately 6 days, but the patterns sometimes change abruptly. Although the environments of large and low-frequency earthquakes are different, these observations suggest that similar complexity might underlie sequences of large earthquakes.

  20. Tidal triggering of earthquakes suggests poroelastic behavior on the San Andreas Fault

    International Nuclear Information System (INIS)

    Delorey, Andrew A.; Elst, Nicholas J. van der; Johnson, Paul Allan

    2016-01-01

    Tidal triggering of earthquakes is hypothesized to provide quantitative information regarding the fault's stress state, poroelastic properties, and may be significant for our understanding of seismic hazard. To date, studies of regional or global earthquake catalogs have had only modest successes in identifying tidal triggering. We posit that the smallest events that may provide additional evidence of triggering go unidentified and thus we developed a technique to improve the identification of very small magnitude events. We identify events applying a method known as inter-station seismic coherence where we prioritize detection and discrimination over characterization. Here we show tidal triggering of earthquakes on the San Andreas Fault. We find the complex interaction of semi-diurnal and fortnightly tidal periods exposes both stress threshold and critical state behavior. Lastly, our findings reveal earthquake nucleation processes and pore pressure conditions – properties of faults that are difficult to measure, yet extremely important for characterizing earthquake physics and seismic hazards.

  1. Clustering and periodic recurrence of microearthquakes on the san andreas fault at parkfield, california.

    Science.gov (United States)

    Nadeau, R M; Foxall, W; McEvilly, T V

    1995-01-27

    The San Andreas fault at Parkfield, California, apparently late in an interval between repeating magnitude 6 earthquakes, is yielding to tectonic loading partly by seismic slip concentrated in a relatively sparse distribution of small clusters (<20-meter radius) of microearthquakes. Within these clusters, which account for 63% of the earthquakes in a 1987-92 study interval, virtually identical small earthquakes occurred with a regularity that can be described by the statistical model used previously in forecasting large characteristic earthquakes. Sympathetic occurrence of microearthquakes in nearby clusters was observed within a range of about 200 meters at communication speeds of 10 to 100 centimeters per second. The rate of earthquake occurrence, particularly at depth, increased significantly during the study period, but the fraction of earthquakes that were cluster members decreased.

  2. Variations in strength and slip rate along the san andreas fault system.

    Science.gov (United States)

    Jones, C H; Wesnousky, S G

    1992-04-03

    Convergence across the San Andreas fault (SAF) system is partitioned between strike-slip motion on the vertical SAF and oblique-slip motion on parallel dip-slip faults, as illustrated by the recent magnitude M(s) = 6.0 Palm Springs, M(s) = 6.7 Coalinga, and M(s) = 7.1 Loma Prieta earthquakes. If the partitioning of slip minimizes the work done against friction, the direction of slip during these recent earthquakes depends primarily on fault dip and indicates that the normal stress coefficient and frictional coefficient (micro) vary among the faults. Additionally, accounting for the active dip-slip faults reduces estimates of fault slip rates along the vertical trace of the SAF by about 50 percent in the Loma Prieta and 100 percent in the North Palm Springs segments.

  3. Break of slope in earthquake size distribution and creep rate along the San Andreas Fault system

    Science.gov (United States)

    Shebalin, P.; Narteau, C.; Vorobieva, I.

    2017-12-01

    Crustal faults accommodate slip either by a succession of earthquakes or continuous slip, andin most instances, both these seismic and aseismic processes coexist. Recorded seismicity and geodeticmeasurements are therefore two complementary data sets that together document ongoing deformationalong active tectonic structures. Here we study the influence of stable sliding on earthquake statistics.We show that creep along the San Andreas Fault is responsible for a break of slope in the earthquake sizedistribution. This slope increases with an increasing creep rate for larger magnitude ranges, whereas itshows no systematic dependence on creep rate for smaller magnitude ranges. This is interpreted as a deficitof large events under conditions of faster creep where seismic ruptures are less likely to propagate. Theseresults suggest that the earthquake size distribution does not only depend on the level of stress but also onthe type of deformation.

  4. Geodetic measurement of deformation east of the San Andreas Fault in Central California

    Science.gov (United States)

    Sauber, Jeanne; Solomon, Sean C.; Lisowski, Michael

    1988-01-01

    The shear strain rates in the Diablo Range of California have been calculated, and the slip rate along the Calaveras and Paicines faults in Central California have been estimated, on the basis of triangulation and trilateration data from two geodetic networks located between the western edge of the Great Valley and the San Andreas Fault. The orientation of the principal compressive strain predicted from the azimuth of the major structures in the region is N 25 deg E, leading to an average shear strain value that corresponds to a relative shortening rate of 4.5 + or - 2.4 mm/yr. It is inferred that the measured strain is due to compression across the fold of this area. The hypothesized uniform, fault-normal compression within the Coast Ranges is not supported by these results.

  5. Animals, Pictures, and Skeletons: Andreas Vesalius's Reinvention of the Public Anatomy Lesson.

    Science.gov (United States)

    Shotwell, R Allen

    2016-01-01

    In this paper, I examine the procedures used by Andreas Vesalius for conducting public dissections in the early sixteenth century. I point out that in order to overcome the limitations of public anatomical demonstration noted by his predecessors, Vesalius employed several innovative strategies, including the use of animals as dissection subjects, the preparation and display of articulated skeletons, and the use of printed and hand-drawn illustrations. I suggest that the examination of these three strategies for resolving the challenges of public anatomical demonstration helps us to reinterpret Vesalius's contributions to sixteenth-century anatomy. © The Author 2015. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  6. Low resistivity and permeability in actively deforming shear zones on the San Andreas Fault at SAFOD

    Science.gov (United States)

    Morrow, Carolyn A.; Lockner, David A.; Hickman, Stephen H.

    2015-01-01

    The San Andreas Fault Observatory at Depth (SAFOD) scientific drillhole near Parkfield, California crosses the San Andreas Fault at a depth of 2.7 km. Downhole measurements and analysis of core retrieved from Phase 3 drilling reveal two narrow, actively deforming zones of smectite-clay gouge within a roughly 200 m-wide fault damage zone of sandstones, siltstones and mudstones. Here we report electrical resistivity and permeability measurements on core samples from all of these structural units at effective confining pressures up to 120 MPa. Electrical resistivity (~10 ohm-m) and permeability (10-21 to 10-22 m2) in the actively deforming zones were one to two orders of magnitude lower than the surrounding damage zone material, consistent with broader-scale observations from the downhole resistivity and seismic velocity logs. The higher porosity of the clay gouge, 2 to 8 times greater than that in the damage zone rocks, along with surface conduction were the principal factors contributing to the observed low resistivities. The high percentage of fine-grained clay in the deforming zones also greatly reduced permeability to values low enough to create a barrier to fluid flow across the fault. Together, resistivity and permeability data can be used to assess the hydrogeologic characteristics of the fault, key to understanding fault structure and strength. The low resistivities and strength measurements of the SAFOD core are consistent with observations of low resistivity clays that are often found in the principal slip zones of other active faults making resistivity logs a valuable tool for identifying these zones.

  7. Holocene geologic slip rate for the Banning strand of the southern San Andreas Fault, southern California

    Science.gov (United States)

    Gold, Peter O.; Behr, Whitney M.; Rood, Dylan; Sharp, Warren D.; Rockwell, Thomas K.; Kendrick, Katherine; Salin, Aaron

    2015-08-01

    Northwest directed slip from the southern San Andreas Fault is transferred to the Mission Creek, Banning, and Garnet Hill fault strands in the northwestern Coachella Valley. How slip is partitioned between these three faults is critical to southern California seismic hazard estimates but is poorly understood. In this paper, we report the first slip rate measured for the Banning fault strand. We constrain the depositional age of an alluvial fan offset 25 ± 5 m from its source by the Banning strand to between 5.1 ± 0.4 ka (95% confidence interval (CI)) and 6.4 + 3.7/-2.1 ka (95% CI) using U-series dating of pedogenic carbonate clast coatings and 10Be cosmogenic nuclide exposure dating of surface clasts. We calculate a Holocene geologic slip rate for the Banning strand of 3.9 + 2.3/-1.6 mm/yr (median, 95% CI) to 4.9 + 1.0/-0.9 mm/yr (median, 95% CI). This rate represents only 25-35% of the total slip accommodated by this section of the southern San Andreas Fault, suggesting a model in which slip is less concentrated on the Banning strand than previously thought. In rejecting the possibility that the Banning strand is the dominant structure, our results highlight an even greater need for slip rate and paleoseismic measurements along faults in the northwestern Coachella Valley in order to test the validity of current earthquake hazard models. In addition, our comparison of ages measured with U-series and 10Be exposure dating demonstrates the importance of using multiple geochronometers when estimating the depositional age of alluvial landforms.

  8. Crustal Deformation along San Andreas Fault System revealed by GPS and Sentinel-1 InSAR

    Science.gov (United States)

    Xu, X.; Sandwell, D. T.

    2017-12-01

    We present a crustal deformation velocity map along the San Andreas Fault System by combining measurements from Sentinel-1 Interferometric Synthetic Aperture Radar (InSAR) and Global Positioning System (GPS) velocity models (CGM V1). We assembled 5 tracks of descending Sentinel-1 InSAR data spanning 2014.11-2017.02, and produced 545 interferograms, each of which covers roughly 250km x 420km area ( 60 bursts). These interferograms are unwrapped using SNAPHU [Chen & Zebker, 2002], with the 2Npi unwrapping ambiguity corrected with a sparse recovery method. We used coherence-based small baseline subset (SBAS) method [Tong & Schmidt, 2016] together with atmospheric correction by common-point stacking [Tymofyeyeva and Fialko, 2015] to construct deformation time series [Xu et. al., 2017]. Then we project the horizontal GPS model and vertical GPS data into satellite line-of-sight directions separately. We first remove the horizontal GPS model from InSAR measurements and perform elevation-dependent atmospheric phase correction. Then we compute the discrepancy between the remaining InSAR measurements and vertical GPS data. We interpolate this discrepancy and remove it from the residual InSAR measurements. Finally, we restore the horizontal GPS model. Preliminary results show that fault creep over the San Jacinto fault, the Elsinore fault, and the San Andreas creeping section is clearly resolved. During the period of drought, the Central Valley of California was subsiding at a high rate (up to 40 cm/yr), while the city of San Jose is uplifting due to recharge, with a quaternary fault acting as a ground water barrier. These findings will be reported during the meeting.

  9. Fault Creep along the Southern San Andreas from Interferometric Synthetic Aperture Radar, Permanent Scatterers, and Stacking

    Science.gov (United States)

    Lyons, Suzanne; Sandwell, David

    2003-01-01

    Interferometric synthetic aperture radar (InSAR) provides a practical means of mapping creep along major strike-slip faults. The small amplitude of the creep signal (less than 10 mm/yr), combined with its short wavelength, makes it difficult to extract from long time span interferograms, especially in agricultural or heavily vegetated areas. We utilize two approaches to extract the fault creep signal from 37 ERS SAR images along the southem San Andreas Fault. First, amplitude stacking is utilized to identify permanent scatterers, which are then used to weight the interferogram prior to spatial filtering. This weighting improves correlation and also provides a mask for poorly correlated areas. Second, the unwrapped phase is stacked to reduce tropospheric and other short-wavelength noise. This combined processing enables us to recover the near-field (approximately 200 m) slip signal across the fault due to shallow creep. Displacement maps fiom 60 interferograms reveal a diffuse secular strain buildup, punctuated by localized interseismic creep of 4-6 mm/yr line of sight (LOS, 12-18 mm/yr horizontal). With the exception of Durmid Hill, this entire segment of the southern San Andreas experienced right-lateral triggered slip of up to 10 cm during the 3.5-year period spanning the 1992 Landers earthquake. The deformation change following the 1999 Hector Mine earthquake was much smaller (4 cm) and broader than for the Landers event. Profiles across the fault during the interseismic phase show peak-to-trough amplitude ranging from 15 to 25 mm/yr (horizontal component) and the minimum misfit models show a range of creeping/locking depth values that fit the data.

  10. Holocene geologic slip rate for the Banning strand of the southern San Andreas Fault, southern California

    Science.gov (United States)

    Gold, Peter O.; Behr, Whitney M.; Rood, Dylan; Sharp, Warren D.; Rockwell, Thomas; Kendrick, Katherine J.; Salin, Aaron

    2015-01-01

    Northwest directed slip from the southern San Andreas Fault is transferred to the Mission Creek, Banning, and Garnet Hill fault strands in the northwestern Coachella Valley. How slip is partitioned between these three faults is critical to southern California seismic hazard estimates but is poorly understood. In this paper, we report the first slip rate measured for the Banning fault strand. We constrain the depositional age of an alluvial fan offset 25 ± 5 m from its source by the Banning strand to between 5.1 ± 0.4 ka (95% confidence interval (CI)) and 6.4 + 3.7/−2.1 ka (95% CI) using U-series dating of pedogenic carbonate clast coatings and 10Be cosmogenic nuclide exposure dating of surface clasts. We calculate a Holocene geologic slip rate for the Banning strand of 3.9 + 2.3/−1.6 mm/yr (median, 95% CI) to 4.9 + 1.0/−0.9 mm/yr (median, 95% CI). This rate represents only 25–35% of the total slip accommodated by this section of the southern San Andreas Fault, suggesting a model in which slip is less concentrated on the Banning strand than previously thought. In rejecting the possibility that the Banning strand is the dominant structure, our results highlight an even greater need for slip rate and paleoseismic measurements along faults in the northwestern Coachella Valley in order to test the validity of current earthquake hazard models. In addition, our comparison of ages measured with U-series and 10Be exposure dating demonstrates the importance of using multiple geochronometers when estimating the depositional age of alluvial landforms.

  11. Cradle of the Earthquake: Exploring the Underwater San Andreas Fault on the R/V Pacific Storm and the SRV Derek M. Baylis between 20100910 and 20101003

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Over one hundred years after the devastating Great 1906 Earthquake that nearly destroyed San Francisco, this expedition explored the Northern San Andreas Fault, the...

  12. A nonlinear least-squares inverse analysis of strike-slip faulting with application to the San Andreas fault

    Science.gov (United States)

    Williams, Charles A.; Richardson, Randall M.

    1988-01-01

    A nonlinear weighted least-squares analysis was performed for a synthetic elastic layer over a viscoelastic half-space model of strike-slip faulting. Also, an inversion of strain rate data was attempted for the locked portions of the San Andreas fault in California. Based on an eigenvector analysis of synthetic data, it is found that the only parameter which can be resolved is the average shear modulus of the elastic layer and viscoelastic half-space. The other parameters were obtained by performing a suite of inversions for the fault. The inversions on data from the northern San Andreas resulted in predicted parameter ranges similar to those produced by inversions on data from the whole fault.

  13. Climate-modulated channel incision and rupture history of the San Andreas Fault in the Carrizo Plain.

    Science.gov (United States)

    Grant Ludwig, Lisa; Akçiz, Sinan O; Noriega, Gabriela R; Zielke, Olaf; Arrowsmith, J Ramón

    2010-02-26

    The spatial and temporal distribution of fault slip is a critical parameter in earthquake source models. Previous geomorphic and geologic studies of channel offset along the Carrizo section of the south central San Andreas Fault assumed that channels form more frequently than earthquakes occur and suggested that repeated large-slip earthquakes similar to the 1857 Fort Tejon earthquake illustrate typical fault behavior. We found that offset channels in the Carrizo Plain incised less frequently than they were offset by earthquakes. Channels have been offset by successive earthquakes with variable slip since ~1400. This nonuniform slip history reveals a more complex rupture history than previously assumed for the structurally simplest section of the San Andreas Fault.

  14. Shallow structure and geomorphology, northern San Andreas fault, Bodega Bay to Fort Ross, California

    Science.gov (United States)

    Johnson, S. Y.; Hartwell, S. R.; Manson, M. W.

    2013-12-01

    We mapped a 35-km-long section of the northwest-trending San Andreas fault zone (SAFZ), extending through Bodega Bay, crossing the onshore Bodega Head isthmus, and continuing in the offshore to Fort Ross, California. Mapping is based on integrated analysis of high-resolution seismic-reflection profiles (38 fault crossings), multibeam bathymetry and backscatter data, onshore geology, seafloor-sediment samples, and digital camera and video imagery. In Bodega Bay, the SAFZ comprises multiple parallel to subparallel strands that extend through a 2-km-wide basin flanked by massive basement terranes, Cretaceous granitic rock on the southwest and Jurassic and Cretaceous Franciscan Complex on the northeast. Seismic profiles reveal the smooth basin seafloor is underlain by a thin (1 to 12 m) layer of latest Pleistocene and Holocene sediments and an underlying inferred Pleistocene unit characterized by faulted and folded reflections revealing numerous angular unconformities and channels. This geology suggests that Bodega Bay originated as a pull-apart basin formed by an eastern transfer of slip within the SAFZ. If so, the pervasive internal folding and faulting of the young basin fill suggests basin subsidence has largely ended and the basin fill is now being deformed. North of the Bodega Head isthmus, the SAFZ is relatively narrow (200 to 500 m wide) and cuts across relatively flat seafloor covered by sediments derived from the Russian River and Salmon Creek. Gentle fault bends and transfers of slip between subparallel strands have resulted in small fault-zone uplifts and four distinct, elongate (~ 500- to 2300-m long), narrow (~ 200- to 300-m wide) sag basins containing as much as 56 m of inferred latest Pleistocene to Holocene sediment. The offshore mapping suggests the presence of an important, previously unrecognized onshore SAFZ strand cutting across the Bodega Head isthmus about 800 m southwest of the only reported 1906 surface rupture in the map area. Onshore, this

  15. Frictional strength heterogeneity and surface heat flow: Implications for the strength of the creeping San Andreas fault

    Science.gov (United States)

    d'Alessio, M. A.; Williams, C.F.; Burgmann, R.

    2006-01-01

    Heat flow measurements along much of the San Andreas fault (SAF) constrain the apparent coefficient of friction (??app) of the fault to 0.2 should be detectable even with the sparse existing observations, implying that ??app for the creeping section is as low as the surrounding SAF. Because the creeping section does not slip in large earthquakes, the mechanism controlling its weakness is not related to dynamic processes resulting from high slip rate earthquake ruptures. Copyright 2006 by the American Geophysical Union.

  16. Detection of aseismic creep along the San Andreas fault near Parkfield, California with ERS-1 radar interferometry

    Science.gov (United States)

    Werner, Charles L.; Rosen, Paul; Hensley, Scott; Fielding, Eric; Buckley, Sean

    1997-01-01

    The differential interferometric analysis of ERS data from Parkfield (CA) observations revealed the wide area distribution of creep along the moving fault segment of the San Andreas fault over a 15 month interval. The removal of the interferometric phase related to the surface topography was carried out. The fault was clearly visible in the differential interferogram. The magnitude of the tropospheric water vapor phase distortions is greater than the signal and hinders quantitative analysis beyond order of magnitude calculations.

  17. Scientific Drilling Into the San Andreas Fault Zone —An Overview of SAFOD’s First Five Years

    Directory of Open Access Journals (Sweden)

    Stephen Hickman

    2011-03-01

    Full Text Available The San Andreas Fault Observatory at Depth (SAFODwas drilled to study the physical and chemical processes controlling faulting and earthquake generation along an active, plate-bounding fault at depth. SAFOD is located near Parkfield, California and penetrates a section of the fault that is moving due to a combination of repeating microearthquakes and fault creep. Geophysical logs define the SanAndreas Fault Zone to be relatively broad (~200 m, containing several discrete zones only 2–3 m wide that exhibit very low P- and S-wave velocities and low resistivity. Two of these zones have progressively deformed the cemented casing at measured depths of 3192 m and 3302 m. Cores from both deforming zones contain a pervasively sheared, cohesionless, foliated fault gouge that coincides with casing deformation and explains the observed extremely low seismic velocities and resistivity. These cores are being now extensivelytested in laboratories around the world, and their composition, deformation mechanisms, physical properties, and rheological behavior are studied. Downhole measurements show that within 200 m (maximum of the active fault trace, the direction of maximum horizontal stress remains at a high angle to the San Andreas Fault, consistent with other measurements. The results from the SAFOD Main Hole, together with the stress state determined in the Pilot Hole, are consistent with a strong crust/weak fault model of the San Andreas. Seismic instrumentation has been deployed to study physics of faulting—earthquake nucleation, propagation, and arrest—in order to test how laboratory-derived concepts scale up to earthquakes occurring in nature.

  18. Magnitude of shear stress on the san andreas fault: implications of a stress measurement profile at shallow depth.

    Science.gov (United States)

    Zoback, M D; Roller, J C

    1979-10-26

    A profile of measurements of shear stress perpendicular to the San Andreas fault near Palmdale, California, shows a marked increase in stress with distance from the fault. The pattern suggests that shear stress on the fault increases slowly with depth and reaches a value on the order of the average stress released during earthquakes. This result has important implications for both long- and shortterm prediction of large earthquakes.

  19. Complexities of the San Andreas fault near San Gorgonio Pass: Implications for large earthquakes

    Science.gov (United States)

    Yule, Doug; Sieh, Kerry

    2003-11-01

    Geologic relationships and patterns of crustal seismicity constrain the three-dimensional geometry of the active portions of San Andreas fault zone near San Gorgonio Pass, southern California. Within a 20-km-wide contractional stepover between two segments of the fault zone, the San Bernardino and Coachella Valley segments, folds, and dextral-reverse and dextral-normal faults form an east-west belt of active structures. The dominant active structure within the stepover is the San Gorgonio Pass-Garnet Hill faults, a dextral-reverse fault system that dips moderately northward. Within the hanging wall block of the San Gorgonio Pass-Garnet Hill fault system are subsidiary active dextral and dextral-normal faults. These faults relate in complex but understandable ways to the strike-slip faults that bound the stepover. The pattern of crustal seismicity beneath these structures includes a 5-8 km high east-west striking step in the base of crustal seismicity, which corresponds to the downdip limit of rupture of the 1986 North Palm Springs earthquake. We infer that this step has been produced by slip on the linked San Gorgonio Pass-Garnet Hill-Coachella Valley Banning (SGP-GH-CVB) fault. This association enables us to construct a structure contour map of the fault plane. The large step in the base of seismicity downdip from the SGP-GH-CVB fault system probably reflects a several kilometers offset of the midcrustal brittle-plastic transition. (U/Th)/He thermochronometry supports our interpretation that this south-under-north thickening of the crust has created the region's 3 km of topographic relief. We conclude that future large earthquakes generated along the San Andreas fault in this region will have a multiplicity of mostly specifiable sources having dimensions of 1-20 km. Two tasks in seismic hazard evaluation may now be attempted with greater confidence: first, the construction of synthetic seismograms that make useful predictions of ground shaking, and second

  20. Low-altitude aerial color digital photographic survey of the San Andreas Fault

    Science.gov (United States)

    Lynch, David K.; Hudnut, Kenneth W.; Dearborn, David S.P.

    2010-01-01

    Ever since 1858, when Gaspard-Félix Tournachon (pen name Félix Nadar) took the first aerial photograph (Professional Aerial Photographers Association 2009), the scientific value and popular appeal of such pictures have been widely recognized. Indeed, Nadar patented the idea of using aerial photographs in mapmaking and surveying. Since then, aerial imagery has flourished, eventually making the leap to space and to wavelengths outside the visible range. Yet until recently, the availability of such surveys has been limited to technical organizations with significant resources. Geolocation required extensive time and equipment, and distribution was costly and slow. While these situations still plague older surveys, modern digital photography and lidar systems acquire well-calibrated and easily shared imagery, although expensive, platform-specific software is sometimes still needed to manage and analyze the data. With current consumer-level electronics (cameras and computers) and broadband internet access, acquisition and distribution of large imaging data sets are now possible for virtually anyone. In this paper we demonstrate a simple, low-cost means of obtaining useful aerial imagery by reporting two new, high-resolution, low-cost, color digital photographic surveys of selected portions of the San Andreas fault in California. All pictures are in standard jpeg format. The first set of imagery covers a 92-km-long section of the fault in Kern and San Luis Obispo counties and includes the entire Carrizo Plain. The second covers the region from Lake of the Woods to Cajon Pass in Kern, Los Angeles, and San Bernardino counties (151 km) and includes Lone Pine Canyon soon after the ground was largely denuded by the Sheep Fire of October 2009. The first survey produced a total of 1,454 oblique digital photographs (4,288 x 2,848 pixels, average 6 Mb each) and the second produced 3,762 nadir images from an elevation of approximately 150 m above ground level (AGL) on the

  1. Seismic Evidence for Conjugate Slip and Block Rotation Within the San Andreas Fault System, Southern California

    Science.gov (United States)

    Nicholson, Craig; Seeber, Leonardo; Williams, Patrick; Sykes, Lynn R.

    1986-08-01

    The pattern of seismicity in southern California indicates that much of the activity is presently occurring on secondary structures, several of which are oriented nearly orthogonal to the strikes of the major through-going faults. Slip along these secondary transverse features is predominantly left-lateral and is consistent with the reactivation of conjugate faults by the current regional stress field. Near the intersection of the San Jacinto and San Andreas faults, however, these active left-lateral faults appear to define a set of small crustal blocks, which in conjunction with both normal and reverse faulting earthquakes, suggests contemporary clockwise rotation as a result of regional right-lateral shear. Other left-lateral faults representing additional rotating block systems are identified in adjacent areas from geologic and seismologic data. Many of these structures predate the modern San Andreas system and may control the pattern of strain accumulation in southern California. Geodetic and paleomagnetic evidence confirm that block rotation by strike-slip faulting is nearly ubiquitous, particularly in areas where shear is distributed, and that it accommodates both short-term elastic and long-term nonelastic strain. A rotating block model accounts for a number of structural styles characteristic of strike-slip deformation in California, including: variable slip rates and alternating transtensional and transpressional features observed along strike of major wrench faults; domains of evenly-spaced antithetic faults that terminate against major fault boundaries; continued development of bends in faults with large lateral displacements; anomalous focal mechanisms; and differential uplift in areas otherwise expected to experience extension and subsidence. Since block rotation requires a detachment surface at depth to permit rotational movement, low-angle structures like detachments, of either local or regional extent, may be involved in the contemporary strike

  2. Modeling of periodic great earthquakes on the San Andreas fault: Effects of nonlinear crustal rheology

    Science.gov (United States)

    Reches, Ze'ev; Schubert, Gerald; Anderson, Charles

    1994-01-01

    We analyze the cycle of great earthquakes along the San Andreas fault with a finite element numerical model of deformation in a crust with a nonlinear viscoelastic rheology. The viscous component of deformation has an effective viscosity that depends exponentially on the inverse absolute temperature and nonlinearity on the shear stress; the elastic deformation is linear. Crustal thickness and temperature are constrained by seismic and heat flow data for California. The models are for anti plane strain in a 25-km-thick crustal layer having a very long, vertical strike-slip fault; the crustal block extends 250 km to either side of the fault. During the earthquake cycle that lasts 160 years, a constant plate velocity v(sub p)/2 = 17.5 mm yr is applied to the base of the crust and to the vertical end of the crustal block 250 km away from the fault. The upper half of the fault is locked during the interseismic period, while its lower half slips at the constant plate velocity. The locked part of the fault is moved abruptly 2.8 m every 160 years to simulate great earthquakes. The results are sensitive to crustal rheology. Models with quartzite-like rheology display profound transient stages in the velocity, displacement, and stress fields. The predicted transient zone extends about 3-4 times the crustal thickness on each side of the fault, significantly wider than the zone of deformation in elastic models. Models with diabase-like rheology behave similarly to elastic models and exhibit no transient stages. The model predictions are compared with geodetic observations of fault-parallel velocities in northern and central California and local rates of shear strain along the San Andreas fault. The observations are best fit by models which are 10-100 times less viscous than a quartzite-like rheology. Since the lower crust in California is composed of intermediate to mafic rocks, the present result suggests that the in situ viscosity of the crustal rock is orders of magnitude

  3. San Andreas Fault, Southern California , Radar Image, Wrapped Color as Height

    Science.gov (United States)

    2000-01-01

    This topographic radar image vividly displays California's famous San Andreas Fault along the southwestern edge of the Mojave Desert, 75 kilometers (46 miles) north of downtown Los Angeles. The entire segment of the fault shown in this image last ruptured during the Fort Tejon earthquake of 1857. This was one of the greatest earthquakes ever recorded in the U.S., and it left an amazing surface rupture scar over 350 kilometers in length along the San Andreas. Were the Fort Tejon shock to happen today, the damage would run into billions of dollars, and the loss of life would likely be substantial, as the communities of Wrightwood, Palmdale, and Lancaster (among others) all lie upon or near the 1857 rupture area. The Lancaster/Palmdale area appears as bright patches just below the center of the image and the San Gabriel Mountains fill the lower left half of the image. At the extreme lower left is Pasadena. High resolution topographic data such as these are used by geologists to study the role of active tectonics in shaping the landscape, and to produce earthquake hazard maps.This image combines two types of data from the Shuttle Radar Topography Mission. The image brightness corresponds to the strength of the radar signal reflected from the ground, while colors show the elevation as measured by SRTM. Each cycle of colors (from pink through blue back to pink) represents an equal amount of elevation difference (400 meters, or 1300 feet) similar to contour lines on a standard topographic map. This image contains about 2400 meters (8000 feet) of total relief.The Shuttle Radar Topography Mission (SRTM), launched on February 11,2000, uses the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. The mission is designed to collect three-dimensional measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter-long (200-foot) mast, an

  4. Balloon Angioplasty - The Legacy of Andreas Grüntzig, M.D. (1939-1985).

    Science.gov (United States)

    Barton, Matthias; Grüntzig, Johannes; Husmann, Marc; Rösch, Josef

    2014-01-01

    In 1974, at the Medical Policlinic of the University of Zürich, German-born physician-scientist Andreas Grüntzig (1939-1985) for the first time applied a balloon-tipped catheter to re-open a severely stenosed femoral artery, a procedure, which he initially called "percutaneous transluminal dilatation". Balloon angioplasty as a therapy of atherosclerotic vascular disease, for which Grüntzig and Charles T. Dotter (1920-1985) received a nomination for the Nobel Prize in Physiology or Medicine in 1978, became one of the most successful examples of translational medicine in the twentieth century. Known today as percutaneous transluminal angioplasty (PTA) in peripheral arteries or percutaneous transluminal coronary angioplasty (PTCA) or percutaneous coronary intervention (PCI) in coronary arteries, balloon angioplasty has become the method of choice to treat patients with acute myocardial infarction or occluded leg arteries. On the occasion of the 40(th) anniversary of balloon angioplasty, we summarize Grüntzig's life and career in Germany, Switzerland, and the United States and also review the developments in vascular medicine from the 1890s to the 1980s, including Dotter's first accidental angioplasty in 1963. The work of pioneers of catheterization, including Pedro L. Fariñas in Cuba, André F. Cournand in France, Werner Forssmann, Werner Porstmann and Eberhard Zeitler in Germany, António Egas Moniz and Reynaldo dos Santos in Portugal, Sven-Ivar Seldinger in Sweden, and Barney Brooks, Thomas J. Fogarty, Melvin P. Judkins, Richard K. Myler, Dickinson W. Richards, and F. Mason Sones in the United States, is discussed. We also present quotes by Grüntzig and excerpts from his unfinished autobiography, statements of Grüntzig's former colleagues and contemporary witnesses, and have included hitherto unpublished historic photographs and links to archive recordings and historic materials. This year, on June 25, 2014, Andreas Grüntzig would have celebrated his 75(th

  5. Investigation of Quaternary slip rates along the Banning strand of the southern San Andreas Fault near San Gorgonio Pass

    Science.gov (United States)

    Gold, P. O.; Behr, W. M.; Rood, D.; Kendrick, K. J.; Rockwell, T. K.; Sharp, W. D.

    2013-12-01

    Present-day Pacific-North American relative plate motion in southern California is shared primarily between the San Jacinto and San Andreas faults. At the north end of the Coachella Valley, the San Andreas fault splits into the Banning and Mission Creek strands, which are sub-parallel to each other within the Indio Hills. Northwest of the Indio Hills, the Mission Creek fault diverges from the Banning and continues northwest toward the southeastern San Bernardino Mountains, but loses surface expression beneath Quaternary alluvial deposits in Morongo Wash. The Banning fault, upon exiting the Indio Hills, is deflected toward the west and transitions into a structurally complex fault zone at San Gorgonio Pass, where it is delineated by thrust scarps in Holocene alluvium. The slip rates of the Banning and Mission Creek fault strands northwest of the Indio Hills and southeast of San Gorgonio Pass are presently unconstrained, but understanding how slip is partitioned between these two strands is critical to southern California earthquake forecasting efforts. Here we present preliminary slip rate data for the Banning fault ~2 km southeast of San Gorgonio Pass at Devers Hill. Using the B4 LiDAR as a base, we have mapped the extents of three truncated and offset alluvial fan deposits, which we have differentiated based on both field and remote (LiDAR- and air photo-based) observations of texture: in particular, the distribution of different clast sizes, pavement and soil development, and color and appearance. To confirm across-fault correlation of the displaced deposits, we have measured 26 cosmogenic Be-10 ages from boulders and cobble samples taken from each of the three fan surfaces on both sides of the fault. One debris flow deposit (Q2a) has been dated to ~80 ka, and appears to be offset 1.6-2.2 km, though confirming this reconstruction will depend on future excavations and uranium-series dating of soil carbonate. A second debris flow deposit (Q2b), for which ages are

  6. Andreas Vesalius' 500th anniversary: the initiation of hand and forearm myology.

    Science.gov (United States)

    Brinkman, R J; Hage, J J

    2015-11-01

    Andreas Vesalius (1515-1564) was the first to market an illustrated text on the freshly dissected muscular anatomy of the human hand and forearm when he published his De Fabrica Corporis Humani Libri Septem, in 1543. To commemorate his 500th birthday, we searched the second of seven books composing De Fabrica, the annotated woodcut illustrations of De Fabrica, the Tabulae Sex, and Epitome, and an eyewitness report of a public dissection by Vesalius for references to the morphology and functions of these muscles. We found Vesalius to have recognized all currently distinguished muscles except the palmaris brevis and he noted occasional absence of some muscles. Generally, he limited the origin and insertion to bones, largely disregarding attachments to membranes and fascia. Functionally, he recorded the muscles as having a single vector and operating on only one joint. We conclude that Vesalius was nearly completely correct about the anatomy of the muscles of the forearm, but much less accurate about their function. 5. © The Author(s) 2015.

  7. Leonardo da Vinci and Andreas Vesalius; the shoulder girdle and the spine, a comparison.

    Science.gov (United States)

    Ganseman, Y; Broos, P

    2008-01-01

    Leonardo Da Vinci and Andreas Vesalius were two important renaissance persons; Vesalius was a surgeon-anatomist who delivered innovative work on the study of the human body, Leonardo da Vinci was an artist who delivered strikingly accurate and beautiful drawings on the human body. Below we compare both masters with regard to their knowledge of the working of the muscles, their method and system of dissection and their system and presentation of the drawings. The investigation consisted of a comparison between both anatomists, in particular concerning their study on the shoulder girdle and spine, by reviewing their original work as well as already existing literature on this subject. The investigation led to the conclusion that the drawings mentioned meant a change in history, and were of high quality, centuries ahead of their time. Both were anatomists, both were revolutionary, only one changed history at the moment itself, while the other changed history centuries later. Leonardo has made beautiful drawings that are at a match with the drawings of today or are even better. Vesalius set the start for medicine as a science as it is until this day. Their lives differed as strongly as their impact. In the light of their time, the achievement they made was extraordinary.

  8. Juan Valverde de Hamusco's unauthorized reproduction of a brain dissection by Andreas Vesalius.

    Science.gov (United States)

    Lanska, Douglas J; Lanska, John R

    2013-02-26

    The objective of the present work is to examine images of the brain dissection by Flemish-born anatomist Andreas Vesalius (1514-1564) as originally represented in the Fabrica (1543), and later copied without Vesalius' permission by Spanish anatomist Juan Valverde de Hamusco (c1525-c1587) in Historia de la composicion del cuerpo humano (1556). Illustrations of the brain dissection in the Fabrica were obtained in digital form, resized, and arranged in a comparable montage to that presented by Valverde. Computer manipulations were used to assess image correspondence. The Valverde illustrations are approximately half the size and are mirror images of those in the Fabrica, but otherwise show the same dissection stages, and identical transverse brain levels and structures. The Valverde illustrations lack shadowing and show minor variations in perspective and fine details (e.g., branching pattern of the middle meningeal artery) from those in the Fabrica. Craftsmen under the direction of Valverde copied the woodcut prints in the Fabrica in close but approximate form by freehand engraving onto copper plates. Differences in the sizes of the images, and in perspective and fine detail, preclude direct tracing of images as the means of copying. Because engravings are in effect "flipped over" to make further prints, subsequent prints made from Valverde's copperplate engravings are mirror images of the prints in Vesalius' Fabrica.

  9. Hydrogeologic Architecture of the San Andreas Fault near the Logan Quarry

    Science.gov (United States)

    Xue, L.; Brodsky, E. E.; Erskine, J.; Fulton, P. M.; Carter, R.

    2015-12-01

    Hydrogeologic properties of fault zones are critical to the faulting processes; however, they are not well understood and difficult to measure in situ. Recording the tidal response of water level is a useful method to measure the in-situ properties. We utilize an array of wells near the San Andreas Fault zone in the Logan Quarry to study the fault zone hydrogeologic architecture by measuring the water tidal response. The measured specific storage and permeability show that there is a localized zone near the fault with higher specific storage and larger permeability than the surrounding region. This change of properties might be related to the fault zone fracture distribution. Surprisingly, the change of the specific storage is the clearest signal. The inferred compliance contrast is consistent with prior estimates of elastic moduli change in the near-fault environment, but the hydrogeologic effects of the compliance change have never before been measured on a major active fault. The observed specific storage structure implies that the fault zone plays an important role in permeability enhancement by seismic shaking. In addition, the measured diffusivity is about 10-2 m2/s, which is comparable to the post-earthquake hydraulic diffusivity measured on the Wenchuan Earthquake Fault. This observed high diffusivity with little variability inside the fault zone might suggest the accumulated pore pressure during interseismic period distributes over a broad region.

  10. The San Andreas Fault and a Strike-slip Fault on Europa

    Science.gov (United States)

    1998-01-01

    The mosaic on the right of the south polar region of Jupiter's moon Europa shows the northern 290 kilometers (180 miles) of a strike-slip fault named Astypalaea Linea. The entire fault is about 810 kilometers (500 miles) long, the size of the California portion of the San Andreas fault on Earth which runs from the California-Mexico border north to the San Francisco Bay. The left mosaic shows the portion of the San Andreas fault near California's san Francisco Bay that has been scaled to the same size and resolution as the Europa image. Each covers an area approximately 170 by 193 kilometers(105 by 120 miles). The red line marks the once active central crack of the Europan fault (right) and the line of the San Andreas fault (left). A strike-slip fault is one in which two crustal blocks move horizontally past one another, similar to two opposing lanes of traffic. The overall motion along the Europan fault seems to have followed a continuous narrow crack along the entire length of the feature, with a path resembling stepson a staircase crossing zones which have been pulled apart. The images show that about 50 kilometers (30 miles) of displacement have taken place along the fault. Opposite sides of the fault can be reconstructed like a puzzle, matching the shape of the sides as well as older individual cracks and ridges that had been broken by its movements. Bends in the Europan fault have allowed the surface to be pulled apart. This pulling-apart along the fault's bends created openings through which warmer, softer ice from below Europa's brittle ice shell surface, or frozen water from a possible subsurface ocean, could reach the surface. This upwelling of material formed large areas of new ice within the boundaries of the original fault. A similar pulling apart phenomenon can be observed in the geological trough surrounding California's Salton Sea, and in Death Valley and the Dead Sea. In those cases, the pulled apart regions can include upwelled materials, but may

  11. Investigating the creeping section of the San Andreas Fault using ALOS PALSAR interferometry

    Science.gov (United States)

    Agram, P. S.; Wortham, C.; Zebker, H. A.

    2010-12-01

    In recent years, time-series InSAR techniques have been used to study the temporal characteristics of various geophysical phenomena that produce surface deformation including earthquakes and magma migration in volcanoes. Conventional InSAR and time-series InSAR techniques have also been successfully used to study aseismic creep across faults in urban areas like the Northern Hayward Fault in California [1-3]. However, application of these methods to studying the time-dependent creep across the Central San Andreas Fault using C-band ERS and Envisat radar satellites has resulted in limited success. While these techniques estimate the average long-term far-field deformation rates reliably, creep measurement close to the fault (J. Sukhatme, Slip along the Hayward fault, California, estimated from space-based synthetic aperture radar interferometry, Geology,26, 559-562, 1998. [2] Ferretti, A., C. Prati and F. Rocca, Permanent Scatterers in SAR Interferometry, IEEE Trans. Geosci. Remote Sens., 39, 8-20, 2001. [3] Lanari, R.,F. Casu, M. Manzo, and P. Lundgren, Application of SBAS D- InSAR technique to fault creep: A case study of the Hayward Fault, California. Remote Sensing of Environment, 109(1), 20-28, 2007. [4] Shanker, A. P., and H. Zebker, Edgelist phase unwrapping algorithm for time-series InSAR. J. Opt. Soc. Am. A, 37(4), 2010.

  12. Does paleoseismology forecast the historic rates of large earthquakes on the San Andreas fault system?

    Science.gov (United States)

    Biasi, Glenn; Scharer, Katherine M.; Weldon, Ray; Dawson, Timothy E.

    2016-01-01

    The 98-year open interval since the most recent ground-rupturing earthquake in the greater San Andreas boundary fault system would not be predicted by the quasi-periodic recurrence statistics from paleoseismic data. We examine whether the current hiatus could be explained by uncertainties in earthquake dating. Using seven independent paleoseismic records, 100 year intervals may have occurred circa 1150, 1400, and 1700 AD, but they occur in a third or less of sample records drawn at random. A second method sampling from dates conditioned on the existence of a gap of varying length suggests century-long gaps occur 3-10% of the time. A combined record with more sites would lead to lower probabilities. Systematic data over-interpretation is considered an unlikely explanation. Instead some form of non-stationary behaviour seems required, perhaps through long-range fault interaction. Earthquake occurrence since 1000 AD is not inconsistent with long-term cyclicity suggested from long runs of earthquake simulators.

  13. Analysis of regional deformation and strain accumulation data adjacent to the San Andreas fault

    Science.gov (United States)

    Turcotte, Donald L.

    1991-01-01

    A new approach to the understanding of crustal deformation was developed under this grant. This approach combined aspects of fractals, chaos, and self-organized criticality to provide a comprehensive theory for deformation on distributed faults. It is hypothesized that crustal deformation is an example of comminution: Deformation takes place on a fractal distribution of faults resulting in a fractal distribution of seismicity. Our primary effort under this grant was devoted to developing an understanding of distributed deformation in the continental crust. An initial effort was carried out on the fractal clustering of earthquakes in time. It was shown that earthquakes do not obey random Poisson statistics, but can be approximated in many cases by coupled, scale-invariant fractal statistics. We applied our approach to the statistics of earthquakes in the New Hebrides region of the southwest Pacific because of the very high level of seismicity there. This work was written up and published in the Bulletin of the Seismological Society of America. This approach was also applied to the statistics of the seismicity on the San Andreas fault system.

  14. The San Andreas Fault and a Strike-slip Fault on Europa

    Science.gov (United States)

    1998-01-01

    The mosaic on the right of the south polar region of Jupiter's moon Europa shows the northern 290 kilometers (180 miles) of a strike-slip fault named Astypalaea Linea. The entire fault is about 810 kilometers (500 miles) long, the size of the California portion of the San Andreas fault on Earth which runs from the California-Mexico border north to the San Francisco Bay. The left mosaic shows the portion of the San Andreas fault near California's san Francisco Bay that has been scaled to the same size and resolution as the Europa image. Each covers an area approximately 170 by 193 kilometers(105 by 120 miles). The red line marks the once active central crack of the Europan fault (right) and the line of the San Andreas fault (left). A strike-slip fault is one in which two crustal blocks move horizontally past one another, similar to two opposing lanes of traffic. The overall motion along the Europan fault seems to have followed a continuous narrow crack along the entire length of the feature, with a path resembling stepson a staircase crossing zones which have been pulled apart. The images show that about 50 kilometers (30 miles) of displacement have taken place along the fault. Opposite sides of the fault can be reconstructed like a puzzle, matching the shape of the sides as well as older individual cracks and ridges that had been broken by its movements. Bends in the Europan fault have allowed the surface to be pulled apart. This pulling-apart along the fault's bends created openings through which warmer, softer ice from below Europa's brittle ice shell surface, or frozen water from a possible subsurface ocean, could reach the surface. This upwelling of material formed large areas of new ice within the boundaries of the original fault. A similar pulling apart phenomenon can be observed in the geological trough surrounding California's Salton Sea, and in Death Valley and the Dead Sea. In those cases, the pulled apart regions can include upwelled materials, but may

  15. Southern San Andreas Fault seismicity is consistent with the Gutenberg-Richter magnitude-frequency distribution

    Science.gov (United States)

    Page, Morgan T.; Felzer, Karen

    2015-01-01

    The magnitudes of any collection of earthquakes nucleating in a region are generally observed to follow the Gutenberg-Richter (G-R) distribution. On some major faults, however, paleoseismic rates are higher than a G-R extrapolation from the modern rate of small earthquakes would predict. This, along with other observations, led to formulation of the characteristic earthquake hypothesis, which holds that the rate of small to moderate earthquakes is permanently low on large faults relative to the large-earthquake rate (Wesnousky et al., 1983; Schwartz and Coppersmith, 1984). We examine the rate difference between recent small to moderate earthquakes on the southern San Andreas fault (SSAF) and the paleoseismic record, hypothesizing that the discrepancy can be explained as a rate change in time rather than a deviation from G-R statistics. We find that with reasonable assumptions, the rate changes necessary to bring the small and large earthquake rates into alignment agree with the size of rate changes seen in epidemic-type aftershock sequence (ETAS) modeling, where aftershock triggering of large earthquakes drives strong fluctuations in the seismicity rates for earthquakes of all magnitudes. The necessary rate changes are also comparable to rate changes observed for other faults worldwide. These results are consistent with paleoseismic observations of temporally clustered bursts of large earthquakes on the SSAF and the absence of M greater than or equal to 7 earthquakes on the SSAF since 1857.

  16. Relating seismicity to the velocity structure of the San Andreas Fault near Parkfield, CA

    Science.gov (United States)

    Lippoldt, Rachel; Porritt, Robert W.; Sammis, Charles G.

    2017-06-01

    The central section of the San Andreas Fault (SAF) displays a range of seismic phenomena including normal earthquakes, low-frequency earthquakes (LFE), repeating microearthquakes (REQ) and aseismic creep. Although many lines of evidence suggest that LFEs are tied to the presence of fluids, their geological setting is still poorly understood. Here, we map the seismic velocity structures associated with LFEs beneath the central SAF using surface wave tomography from ambient seismic noise to provide constraints on the physical conditions that control LFE occurrence. Fault perpendicular sections show that the SAF, as revealed by lateral contrasts in relative velocities, is contiguous to depths of 50 km and appears to be relatively localized at depths between about 15 and 30 km. This is consistent with the hypothesis that LFEs are shear-slip events on a deep extension of the SAF. We find that along strike variations in seismic behaviour correspond to changes in the seismic structure, which support proposed connections between fluids and seismicity. LFEs and REQs occur within low-velocity structures, suggesting that the presence of fluids, weaker minerals, or hydrous phase minerals may play an important role in the generation of slow-slip phenomena.

  17. Seismic trapped modes in the oroville and san andreas fault zones.

    Science.gov (United States)

    Li, Y G; Leary, P; Aki, K; Malin, P

    1990-08-17

    Three-component borehole seismic profiling of the recently active Oroville, California, normal fault and microearthquake event recording with a near-fault three-component borehole seismometer on the San Andreas fault at Parkfield, California, have shown numerous instances of pronounced dispersive wave trains following the shear wave arrivals. These wave trains are interpreted as fault zone-trapped seismic modes. Parkfield earthquakes exciting trapped modes have been located as deep as 10 kilometers, as shallow as 4 kilometers, and extend 12 kilometers along the fault on either side of the recording station. Selected Oroville and Parkfield wave forms are modeled as the fundamental and first higher trapped SH modes of a narrow low-velocity layer at the fault. Modeling results suggest that the Oroville fault zone is 18 meters wide at depth and has a shear wave velocity of 1 kilometer per second, whereas at Parkfield, the fault gouge is 100 to 150 meters wide and has a shear wave velocity of 1.1 to 1.8 kilometers per second. These low-velocity layers are probably the rupture planes on which earthquakes occur.

  18. Searching for geodetic transient slip signals along the Parkfield segment of the San Andreas Fault

    Science.gov (United States)

    Rousset, B.; Burgmann, R.

    2017-12-01

    The Parkfield section of the San Andreas fault is at the transition between a segment locked since the 1857 Mw 7.9 Fort Tejon earthquake to its south and a creeping segment to the north. It is particularly well instrumented since it is the many previous studies have focused on studying the coseismic and postseismic phases of the two most recent earthquake cycles, the interseismic phase is exhibiting interesting dynamics at the down-dip edge of the seismogenic zone, characterized by a very large number of low frequency earthquakes (LFE) with different behaviors depending on location. Interseismic fault creep rates appear to vary over a wide range of spatial and temporal scales, from the Earth's surface to the base of crust. In this study, we take advantage of the dense Global Positioning System (GPS) network, with 77 continuous stations located within a circle of radius 80 km centered on Parkfield. We correct these time series for the co- and postseismic signals of the 2003 Mw 6.3 San Simeon and 2004 Mw 6.0 Parkfield earthquakes. We then cross-correlate the residual time series with synthetic slow-slip templates following the approach of Rousset et al. (2017). Synthetic tests with transient events contained in GPS time series with realistic noise show the limit of detection of the method. In the application with real GPS time series, the highest correlation amplitudes are compared with micro-seismicity rates, as well as tremor and LFE observations.

  19. La chapelle de la résidence universitaire Jean-Zay à Antony (Hauts-de-Seine) par Eugène Beaudouin : matériau traditionnel de l’architecture religieuse et création contemporaine

    OpenAIRE

    Florence Margo-Schwoebel

    2009-01-01

    Après avoir mené à Antony la construction de la résidence universitaire Jean Zay en dix-huit mois (1954-1955), grâce à des procédés de construction industrialisés, Eugène Beaudouin compléta son projet d’une chapelle indépendante, réalisée selon des procédés traditionnels et consacrée en 1961. Dans cette chapelle Sainte-Croix, l’architecte renouait avec une certaine approche historiciste, sans pour autant rompre avec la création contemporaine. Son goût affirmé pour la prédominance du dessin s’...

  20. Deformation mechanisms in the San Andreas Fault zone - a comparison between natural and experimentally deformed microstructures

    Science.gov (United States)

    van Diggelen, Esther; Holdsworth, Robert; de Bresser, Hans; Spiers, Chris

    2010-05-01

    The San Andreas Fault (SAF) in California marks the boundary between the Pacific plate and the North American plate. The San Andreas Fault Observatory at Depth (SAFOD) is located 9 km northwest of the town of Parkfield, CA and provide an extensive set of samples through the SAF. The SAFOD drill hole encountered different lithologies, including arkosic sediments from the Salinian block (Pacific plate) and claystones and siltstones from the Great Valley block (North American plate). Fault deformation in the area is mainly by a combination of micro-earthquakes and fault creep. Deformation of the borehole casing indicated that the SAFOD drill hole cross cuts two actively deforming strands of the SAF. In order to determine the deformation mechanisms in the actively creeping fault segments, we have studied thin sections obtained from SAFOD phase 3 core material using optical and electron microscopy, and we have compared these natural SAFOD microstructures with microstructures developed in simulated fault gouges deformed in laboratory shear experiments. The phase 3 core material is divided in three different core intervals consisting of different lithologies. Core interval 1 consists of mildly deformed Salinian rocks that show evidence of cataclasis, pressure solution and reaction of feldspar to form phyllosilicates, all common processes in upper crustal rocks. Most of Core interval 3 (Great Valley) is also only mildly deformed and very similar to Core interval 1. Bedding and some sedimentary features are still visible, together with limited evidence for cataclasis and pressure solution, and reaction of feldspar to form phyllosilicates. However, in between the relatively undeformed rocks, Core interval 3 encountered a zone of foliated fault gouge, consisting mostly of phyllosilicates. This zone is correlated with one of the zones of localized deformation of the borehole casing, i.e. with an actively deforming strand of the SAF. The fault gouge zone shows a strong, chaotic

  1. San Andreas Fault, Southern California, Shaded relief, wrapped color as height

    Science.gov (United States)

    2000-01-01

    This topographic image vividly displays California's famous San Andreas Fault along the southwestern edge of the Mojave Desert, 75 kilometers (46 miles) north of downtown Los Angeles. The entire segment of the fault shown in this image last ruptured during the Fort Tejon earthquake of 1857. This was one of the greatest earthquakes ever recorded in the U.S., and it left an amazing surface rupture scar over 350 kilometers in length along the San Andreas. Were the Fort Tejon shock to happen today, the damage would run into billions of dollars, and the loss of life would likely be substantial, as the communities of Wrightwood, Palmdale, and Lancaster (among others) all lie upon or near the 1857 rupture area. The San Gabriel Mountains fill the lower left half of the image. At the extreme lower left is Pasadena. High resolution topographic data such as these are used by geologists to study the role of active tectonics in shaping the landscape, and to produce earthquake hazard maps.This image was generated using topographic data from the Shuttle Radar Topography Mission. Colors show the elevation as measured by SRTM. Each cycle of colors (from pink through blue back to pink) represents an equal amount of elevation difference (400 meters, or 1300 feet) similar to contour lines on a standard topographic map. This image contains about 2400 meters (8000 feet) of total relief. For the shading, a computer-generated artificial light source illuminates the elevation data to produce a pattern of light and shadows. Slopes facing the light appear bright, while those facing away are shaded. Shaded relief maps are commonly used in applications such as geologic mapping and land use planning.The Shuttle Radar Topography Mission (SRTM), launched on February 11,2000, uses the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. The mission is designed to collect three

  2. Magnetic profiling of the San Andreas Fault using a dual magnetometer UAV aerial survey system.

    Science.gov (United States)

    Abbate, J. A.; Angelopoulos, V.; Masongsong, E. V.; Yang, J.; Medina, H. R.; Moon, S.; Davis, P. M.

    2017-12-01

    Aeromagnetic survey methods using planes are more time-effective than hand-held methods, but can be far more expensive per unit area unless large areas are covered. The availability of low cost UAVs and low cost, lightweight fluxgate magnetometers (FGMs) allows, with proper offset determination and stray fields correction, for low-cost magnetic surveys. Towards that end, we have developed a custom multicopter UAV for magnetic mapping using a dual 3-axis fluxgate magnetometer system: the GEOphysical Drone Enhanced Survey Instrument (GEODESI). A high precision sensor measures the UAV's position and attitude (roll, pitch, and yaw) and is recorded using a custom Arduino data processing system. The two FGMs (in-board and out-board) are placed on two ends of a vertical 1m boom attached to the base of the UAV. The in-board FGM is most sensitive to stray fields from the UAV and its signal is used, after scaling, to clean the signal of the out-board FGM from the vehicle noise. The FGMs record three orthogonal components of the magnetic field in the UAV body coordinates which are then transformed into a north-east-down coordinate system using a rotation matrix determined from the roll-pitch-yaw attitude data. This ensures knowledge of the direction of all three field components enabling us to perform inverse modeling of magnetic anomalies with greater accuracy than total or vertical field measurements used in the past. Field tests were performed at Dragon's Back Pressure Ridge in the Carrizo Plain of California, where there is a known crossing of the San Andreas Fault. Our data and models were compared to previously acquired LiDAR and hand-held magnetometer measurements. Further tests will be carried out to solidify our results and streamline our processing for educational use in the classroom and student field training.

  3. Remote triggering of fault-strength changes on the San Andreas fault at Parkfield.

    Science.gov (United States)

    Taira, Taka'aki; Silver, Paul G; Niu, Fenglin; Nadeau, Robert M

    2009-10-01

    Fault strength is a fundamental property of seismogenic zones, and its temporal changes can increase or decrease the likelihood of failure and the ultimate triggering of seismic events. Although changes in fault strength have been suggested to explain various phenomena, such as the remote triggering of seismicity, there has been no means of actually monitoring this important property in situ. Here we argue that approximately 20 years of observation (1987-2008) of the Parkfield area at the San Andreas fault have revealed a means of monitoring fault strength. We have identified two occasions where long-term changes in fault strength have been most probably induced remotely by large seismic events, namely the 2004 magnitude (M) 9.1 Sumatra-Andaman earthquake and the earlier 1992 M = 7.3 Landers earthquake. In both cases, the change possessed two manifestations: temporal variations in the properties of seismic scatterers-probably reflecting the stress-induced migration of fluids-and systematic temporal variations in the characteristics of repeating-earthquake sequences that are most consistent with changes in fault strength. In the case of the 1992 Landers earthquake, a period of reduced strength probably triggered the 1993 Parkfield aseismic transient as well as the accompanying cluster of four M > 4 earthquakes at Parkfield. The fault-strength changes produced by the distant 2004 Sumatra-Andaman earthquake are especially important, as they suggest that the very largest earthquakes may have a global influence on the strength of the Earth's fault systems. As such a perturbation would bring many fault zones closer to failure, it should lead to temporal clustering of global seismicity. This hypothesis seems to be supported by the unusually high number of M >or= 8 earthquakes occurring in the few years following the 2004 Sumatra-Andaman earthquake.

  4. Constraints on the source parameters of low-frequency earthquakes on the San Andreas Fault

    Science.gov (United States)

    Thomas, Amanda M.; Beroza, Gregory C.; Shelly, David R.

    2016-01-01

    Low-frequency earthquakes (LFEs) are small repeating earthquakes that occur in conjunction with deep slow slip. Like typical earthquakes, LFEs are thought to represent shear slip on crustal faults, but when compared to earthquakes of the same magnitude, LFEs are depleted in high-frequency content and have lower corner frequencies, implying longer duration. Here we exploit this difference to estimate the duration of LFEs on the deep San Andreas Fault (SAF). We find that the M ~ 1 LFEs have typical durations of ~0.2 s. Using the annual slip rate of the deep SAF and the average number of LFEs per year, we estimate average LFE slip rates of ~0.24 mm/s. When combined with the LFE magnitude, this number implies a stress drop of ~104 Pa, 2 to 3 orders of magnitude lower than ordinary earthquakes, and a rupture velocity of 0.7 km/s, 20% of the shear wave speed. Typical earthquakes are thought to have rupture velocities of ~80–90% of the shear wave speed. Together, the slow rupture velocity, low stress drops, and slow slip velocity explain why LFEs are depleted in high-frequency content relative to ordinary earthquakes and suggest that LFE sources represent areas capable of relatively higher slip speed in deep fault zones. Additionally, changes in rheology may not be required to explain both LFEs and slow slip; the same process that governs the slip speed during slow earthquakes may also limit the rupture velocity of LFEs.

  5. Locating Very-Low-Frequency Earthquakes in the San Andreas Fault.

    Science.gov (United States)

    Peña-Castro, A. F.; Harrington, R. M.; Cochran, E. S.

    2016-12-01

    The portion of tectonic fault where rheological properties transtition from brittle to ductile hosts a variety of seismic signals suggesting a range of slip velocities. In subduction zones, the two dominantly observed seismic signals include very-low frequency earthquakes ( VLFEs), and low-frequency earthquakes (LFEs) or tectonic tremor. Tremor and LFE are also commonly observed in transform faults, however, VLFEs have been reported dominantly in subduction zone environments. Here we show some of the first known observations of VLFEs occurring on a plate boundary transform fault, the San Andreas Fault (SAF) between the Cholame-Parkfield segment in California. We detect VLFEs using both permanent and temporary stations in 2010-2011 within approximately 70 km of Cholame, California. We search continous waveforms filtered from 0.02-0.05 Hz, and remove time windows containing teleseismic events and local earthquakes, as identified in the global Centroid Moment Tensor (CMT) and the Northern California Seismic Network (NCSN) catalog. We estimate the VLFE locations by converting the signal into envelopes, and cross-correlating them for phase-picking, similar to procedures used for locating tectonic tremor. We first perform epicentral location using a grid search method and estimate a hypocenter location using Hypoinverse and a shear-wave velocity model when the epicenter is located close to the SAF trace. We account for the velocity contrast across the fault using separate 1D velocity models for stations on each side. Estimated hypocentral VLFE depths are similar to tremor catalog depths ( 15-30 km). Only a few VLFEs produced robust hypocentral locations, presumably due to the difficulty in picking accurate phase arrivals with such a low-frequency signal. However, for events for which no location could be obtained, the moveout of phase arrivals across the stations were similar in character, suggesting that other observed VLFEs occurred in close proximity.

  6. O diálogo Freud - Lou Andreas-Salomé sobre a feminilidade e o erotismo

    OpenAIRE

    Lara Medeiros Borges Pereira

    2016-01-01

    Resumo: Este trabalho visa a estudar o diálogo Freud ¿ Lou Andreas-Salomé sobre a feminilidade e o erotismo. A problematização do feminino surge na obra de Freud a partir de 1905, em Três ensaios sobre a teoria da sexualidade, texto no qual ele introduz a ideia de que existe uma sexualidade infantil, trazendo à tona questões bastante polêmicas sobre a sexualidade de meninos e meninas. Com uma teoria baseada, a princípio, nas implicações da presença ou ausência de um elemento fálico real para ...

  7. Euroopas ei ole paremäärmuslus enam luuserite ideoloogia / Andrea Pető ; intervjueerinud Barbi Pilvre

    Index Scriptorium Estoniae

    Pető, Andrea

    2016-01-01

    Intervjuu Tallinnas Friedrich Eberti fondi kutsel viibinud Budapesti Kesk-Euroopa ülikooli professori Andrea Pető'ga, kes kaasautorina tähistas raamatu "Gender as Symbolic Glue. The Position and Role of Conservative and Far Right Parties In the Anti-Gender Mobilizations In Europe" eestikeelse tõlke "Sugu kui sümboolne liim" valmimist. Intervjuus avab ta soolise võrdõiguslikkuse, reproduktiivõiguste ja LGBTQ-vastaste liikumiste konservatiivset ja paremäärmuslikku tausta

  8. Observations of strain accumulation across the san andreas fault near palmdale, california, with a two-color geodimeter.

    Science.gov (United States)

    Langbein, J O; Linker, M F; McGarr, A; Slater, L E

    1982-12-17

    Two-color laser ranging measurements during a 15-month period over a geodetic network spanning the San Andreas fault near Palmdale, California, indicate that the crust expands and contracts aseismically in episodes as short as 2 weeks. Shear strain parallel to the fault has accumulated monotonically since November 1980, but at a variable rate. Improvements in measurement precision and temporal resolution over those of previous geodetic studies near Palmdale have resulted in the definition of a time history of crustal deformation that is much more complex than formerly realized.

  9. A rheologically layered three-dimensional model of the San Andreas fault in central and southern California

    Science.gov (United States)

    Williams, Charles A.; Richardson, Randall M.

    1991-01-01

    The effects of rheological parameters and the fault slip distribution on the horizontal and vertical deformation in the vicinity of the fault are investigated using 3D kinematic finite element models of the San Andreas fault in central and southern California. It is shown that fault models with different rheological stratification schemes and slip distributions predict characteristic deformation patterns. Models that do not include aseismic slip below the fault locking depth predict deformation patterns that are strongly dependent on time since the last earthquake, while models that incorporate the aseismic slip below the locking depth depend on time to a significantly lesser degree.

  10. Evaluation of hypotheses for right-lateral displacement of Neogene strata along the San Andreas Fault between Parkfield and Maricopa, California

    Science.gov (United States)

    Stanley, Richard G.; Barron, John A.; Powell, Charles L.

    2017-12-22

    We used geological field studies and diatom biostratigraphy to test a published hypothesis that Neogene marine siliceous strata in the Maricopa and Parkfield areas, located on opposite sides of the San Andreas Fault, were formerly contiguous and then were displaced by about 80–130 kilometers (km) of right-lateral slip along the fault. In the Maricopa area on the northeast side of the San Andreas Fault, the upper Miocene Bitterwater Creek Shale consists of hard, siliceous shale with dolomitic concretions and turbidite sandstone interbeds. Diatom assemblages indicate that the Bitterwater Creek Shale was deposited about 8.0–6.7 million years before present (Ma) at the same time as the uppermost part of the Monterey Formation in parts of coastal California. In the Parkfield area on the southwest side of the San Andreas Fault, the upper Miocene Pancho Rico Formation consists of soft to indurated mudstone and siltstone and fossiliferous, bioturbated sandstone. Diatom assemblages from the Pancho Rico indicate deposition about 6.7–5.7 Ma (latest Miocene), younger than the Bitterwater Creek Shale and at about the same time as parts of the Sisquoc Formation and Purisima Formation in coastal California. Our results show that the Bitterwater Creek Shale and Pancho Rico Formation are lithologically unlike and of different ages and therefore do not constitute a cross-fault tie that can be used to estimate rightlateral displacement along the San Andreas Fault.In the Maricopa area northeast of the San Andreas Fault, the Bitterwater Creek Shale overlies conglomeratic fan-delta deposits of the upper Miocene Santa Margarita Formation, which in turn overlie siliceous shale of the Miocene Monterey Formation from which we obtained a diatom assemblage dated at about 10.0–9.3 Ma. Previous investigations noted that the Santa Margarita Formation in the Maricopa area contains granitic and metamorphic clasts derived from sources in the northern Gabilan Range, on the opposite side of

  11. ["... I shall never forget the gift by which you established yourself as friend in my life!" The letters of Lou Andreas-Salomé to Max Eitingon (1911-1933)].

    Science.gov (United States)

    Weber, Inge

    2015-01-01

    The correspondence between Andreas-Salomé and the Eitingons draws attention to their long-standing relation. The letters contained among the Eitingon papers in Jerusalem (81 items) were complemented by the much smaller set (5 items) held by the Lou Andreas-Salomé Archives in Göttingen. The material highlights for the first time Eitingon's role in securing Andreas-Salomé's access to the Berlin psychoanalytic association and for her entering psychoanalytic practice. In the 20s the relation between Andreas-Salomé and Mirra Eitingon intensified, based on their common Russian background. Several aspects featured in the letters are discussed in appendixes: the role of Russian language and habits; Max Nachmansohn, an analysand of Andreas-Salomé; her literary gift to Freud's 70th birthday; the dealing with fees in psychoanalysis.

  12. Structural features of the San Andreas fault at Tejon Pass, California

    Science.gov (United States)

    Dewers, T. A.; Reches, Z.; Brune, J. N.

    2002-12-01

    We mapped a 2 km belt along the San Andreas fault (SAF) in the Tejon Pass area where road cuts provide fresh exposures of the fault zone and surrounding rocks. Our 1:2,000 structural mapping is focused on analysis of faulting processes and is complementary to regional mapping at 1:12,000 scale by Ramirez (M.Sc., UC Santa Barbara, 1984). The dominant rock units are the Hungry Valley Formation of Pliocene age (clastic sediments) exposed south of the SAF, and the Tejon Lookout granite (Cretaceous) and Neenach Volcanic Formation exposed north of it. Ramirez (1983) deduced ~220 km of post-Miocene lateral slip. The local trend of the SAF is about N60W and it includes at least three main, subparallel segments that form a 200 m wide zone. The traces of the segments are quasi-linear, discontinuous, and they are stepped with respect to each other, forming at least five small pull-aparts and sag ponds in the mapping area. The three segments were not active semi-contemporaneously and the southern segment is apparently the oldest. The largest pull-apart, 60-70 m wide, displays young (Quaternary?) silt and shale layers. We found two rock bodies that are suspected as fault-rocks. One is a 1-2 m thick sheet-like body that separates the Tejon Lookout granite from young (Recent?) clastic rocks. In the field, it appears as a gouge zone composed of poorly cemented, dark clay size grains; however, the microstructure of this rock does not reveal clear shear features. The second body is the 80-120 m wide zone of Tejon Lookout granite that extends for less than 1 km along the SAF in the mapped area. It is characterized by three structural features: (1) pulverization into friable, granular material by multitude of grain-crossing fractures; (2) abundance of dip-slip small faults that are gently dipping toward and away from the SAF; and (3) striking lack of evidence for shear parallel to the SAF. The relationships between these features and the large right-lateral shear along the SAF are

  13. New slip rate estimates for the Mission Creek strand of the San Andreas fault zone

    Science.gov (United States)

    Blisniuk, K.; Scharer, K. M.; Sharp, W. D.; Burgmann, R.; Rymer, M. J.; Williams, P. L.

    2013-12-01

    The potential for a large-magnitude earthquake (Mw ≥ 6.7) on the southern San Andreas fault zone (SAFZ) is generally considered high (Working Group on California Earthquake Probabilities, 2007). However, the proportion of slip accommodated by each of its three major fault strands (Mission Creek, Banning, and Garnet Hill, from north to south) in the Indio Hills is poorly constrained. Each of these strands cut through San Gorgonio Pass west to the Los Angeles metropolitan region. To better assess the relative importance of these faults and their potential for a major earthquake, we dated offsets at two sites on the Mission Creek fault in the central Indio Hills, an offset channel at Pushawalla Canyon and an offset debris cone at a small unnamed canyon located ~1.5 km farther southeast. Previous work on this strand at Biskra Palms, in the southern Indio Hills, demonstrated a slip rate between 12 and 22 mm/yr, with a preferred rate of 14-17 mm/yr (Behr et al., GSAB, 2010). It is generally assumed that the slip rate on the Mission Creek fault decreases northwestwards from Biskra Palms (e.g. Fumal et al., BSSA, 2002) towards these two sites in the central Indio Hills. However, our initial results from uranium-series dating of pedogenic carbonate and 10Be cosmogenic exposure dating of surface clasts from deposits offset 1.3-1.6 km since ~70 ka and 44-50 m since ~2.5 ka indicate that during the late Pleistocene and Holocene slip on the Mission Creek fault in the central Indio Hills has occurred at a relatively constant and unexpectedly high rate of ~20 mm/yr. Combined with published paleoseismic studies for the Mission Creek fault, which show an average earthquake recurrence interval of 225 years for the past 5 events since 900 AD (Fumal et al., 2002), these data imply an average slip-per-event of ~4.5 m. The last earthquake to rupture this section of the Mission Creek fault occurred over 300 years ago (ca. 1690), which indicates that ca. 5.0 to 7.5 m of strain may have

  14. Structural Mapping Along the Central San Andreas Fault-zone Using Airborne Electromagnetics

    Science.gov (United States)

    Zamudio, K. D.; Bedrosian, P.; Ball, L. B.

    2017-12-01

    Investigations of active fault zones typically focus on either surface expressions or the associated seismogenic zones. However, the largely aseismic upper kilometer can hold significant insight into fault-zone architecture, strain partitioning, and fault-zone permeability. Geophysical imaging of the first kilometer provides a link between surface fault mapping and seismically-defined fault zones and is particularly important in geologically complex regions with limited surface exposure. Additionally, near surface imaging can provide insight into the impact of faulting on the hydrogeology of the critical zone. Airborne electromagnetic (AEM) methods offer a unique opportunity to collect a spatially-large, detailed dataset in a matter of days, and are used to constrain subsurface resistivity to depths of 500 meters or more. We present initial results from an AEM survey flown over a 60 kilometer long segment of the central San Andreas Fault (SAF). The survey is centered near Parkfield, California, the site of the SAFOD drillhole, which marks the transition between a creeping fault segment to the north and a locked zone to the south. Cross sections with a depth of investigation up to approximately 500 meters highlight the complex Tertiary and Mesozoic geology that is dismembered by the SAF system. Numerous fault-parallel structures are imaged across a more than 10 kilometer wide zone centered on the surface trace. Many of these features can be related to faults and folds within Plio-Miocene sedimentary rocks found on both sides of the fault. Northeast of the fault, rocks of the Mesozoic Franciscan and Great Valley complexes are extremely heterogeneous, with highly resistive volcanic rocks within a more conductive background. The upper 300 meters of a prominent fault-zone conductor, previously imaged to 1-3 kilometers depth by magnetotellurics, is restricted to a 20 kilometer long segment of the fault, but is up to 4 kilometers wide in places. Elevated fault

  15. Inferring fault rheology from low-frequency earthquakes on the San Andreas

    Science.gov (United States)

    Beeler, Nicholas M.; Thomas, Amanda; Bürgmann, Roland; Shelly, David R.

    2013-01-01

    Families of recurring low-frequency earthquakes (LFEs) within nonvolcanic tremor (NVT) on the San Andreas fault in central California show strong sensitivity to shear stress induced by the daily tidal cycle. LFEs occur at all levels of the tidal shear stress and are in phase with the very small, ~400 Pa, stress amplitude. To quantitatively explain the correlation, we use a model from the existing literature that assumes the LFE sources are small, persistent regions that repeatedly fail during shear of a much larger scale, otherwise aseismically creeping fault zone. The LFE source patches see tectonic loading, creep of the surrounding fault which may be modulated by the tidal stress, and direct tidal loading. If the patches are small relative to the surrounding creeping fault then the stressing is dominated by fault creep, and if patch failure occurs at a threshold stress, then the resulting seismicity rate is proportional to the fault creep rate or fault zone strain rate. Using the seismicity rate as a proxy for strain rate and the tidal shear stress, we fit the data with possible fault rheologies that produce creep in laboratory experiments at temperatures of 400 to 600°C appropriate for the LFE source depth. The rheological properties of rock-forming minerals for dislocation creep and dislocation glide are not consistent with the observed fault creep because strong correlation between small stress perturbations and strain rate requires perturbation on the order of the ambient stress. The observed tidal modulation restricts ambient stress to be at most a few kilopascal, much lower than rock strength. A purely rate dependent friction is consistent with the observations only if the product of the friction rate dependence and effective normal stress is ~ 0.5 kPa. Extrapolating the friction rate strengthening dependence of phyllosilicates (talc) to depth would require the effective normal stress to be ~50 kPa, implying pore pressure is lithostatic. If the LFE

  16. Using low-frequency earthquake families on the San Andreas fault as deep creepmeters

    Science.gov (United States)

    Thomas, A.; Beeler, N. M.; Bletery, Q.; Burgmann, R.; Shelly, D. R.

    2017-12-01

    The San Andreas fault hosts tectonic tremor and low-frequency earthquakes (LFEs) similar to those in subduction zone environments. These LFEs are grouped into families based on waveform similarity and locate between 16 and 29 km depth along a 150-km-long section of the fault centered on Parkfield, CA. ­Within individual LFE families event occurrence is not steady. In some families, bursts of a few events recur on timescales of days while in other families there are nearly quiescent periods that often last for months followed by episodes where hundreds of events occur over the course of a few days. These two different styles of LFE occurrence are called continuous and episodic respectively. LFEs are often assumed to reflect persistent regions that periodically fail during the aseismic shear of the surrounding fault allowing them to be used as creepmeters. We test this idea by formalizing the definition of a creepmeter (the LFE occurrence rate is proportional to the local fault slip rate), determining whether this definition is consistent with the observations, and over what timescale. We use the recurrence intervals of LFEs within individual families to create a catalog of LFE bursts. For the episodic families, we consider both longer duration (multiday) inferred creep episodes (dubbed long-timescale episodic) as well as the frequent short-term bursts of events that occur many times during inferred creep episodes (dubbed short-timescale episodic). We then use the recurrence intervals of LFE bursts to estimate the timing, duration, recurrence interval, slip, and slip rate associated with inferred slow slip events. We find that continuous families and the short-timescale episodic families appear to be inconsistent with our definition of a creepmeter (defined on the recurrence interval timescale) because their estimated durations are not physically meaningful. A straight-forward interpretation of the frequent short-term bursts of the continuous and short

  17. Un artista cortesano en la Barcelona de Carlos III de Austria: apuntes prosopográficos sobre Andrea Vaccaro II

    Directory of Open Access Journals (Sweden)

    Quirós Rosado, Roberto

    2016-09-01

    Full Text Available At the beginning of the 18th century Barcelona was a principal entry point for the introduction of Italian courtly culture in Spain during the brief reign of Carlos III of Habsburg. This study analyzes the presence of the little-known Neapolitan painter Andrea Vaccaro II in Cataluña, and his connections with the Royal Chamber and the Spanish Habsburg ministry, as well as the concession of offices in Reame as payment for palace services.La diversidad de focos de introducción de la cultura de corte italiana en los inicios del siglo XVIII español obliga a indagar en la circulación de artistas napolitanos en la Barcelona de Carlos III de Austria. Bajo esta premisa, en el estudio se analiza la estancia catalana del desconocido pintor napolitano Andrea Vaccaro II, sus lazos con la Real Cámara y el ministerio español del monarca Habsburgo, así como la concesión de oficios en los tribunales de Nápoles como pago por servicios en palacio.

  18. Tidal Sensitivity of Declustered Low Frequency Earthquake Families and Inferred Creep Episodes on the San Andreas Fault

    Science.gov (United States)

    Babb, A.; Thomas, A.; Bletery, Q.

    2017-12-01

    Low frequency earthquakes (LFEs) are detected at depths of 16-30 km on a 150 km section of the San Andreas Fault centered at Parkfield, CA. The LFEs are divided into 88 families based on waveform similarity. Each family is thought to represent a brittle asperity on the fault surface that repeatedly slips during aseismic slip of the surrounding fault. LFE occurrence is irregular which allows families to be divided into continuous and episodic. In continuous families a burst of a few LFE events recurs every few days while episodic families experience essentially quiescent periods often lasting months followed by bursts of hundreds of events over a few days. The occurrence of LFEs has also been shown to be sensitive to extremely small ( 1kPa) tidal stress perturbations. However, the clustered nature of LFE occurrence could potentially bias estimates of tidal sensitivity. Here we re-evaluate the tidal sensitivity of LFE families on the deep San Andreas using a declustered catalog. In this catalog LFE bursts are isolated based on the recurrence intervals between individual LFE events for each family. Preliminary analysis suggests that declustered LFE families are still highly sensitive to tidal stress perturbations, primarily right-lateral shear stress (RLSS) and to a lesser extent fault normal stress (FNS). We also find inferred creep episodes initiate preferentially during times of positive RLSS.

  19. The Ash of Ohlson Ranch: A well-dated Stratigraphic Marker for Constraining Deformation Across the Northern San Andreas Fault

    Science.gov (United States)

    McLaughlin, R. J.; Vazquez, J. A.; Fleck, R. J.; DeLong, S.; Sarna-Wojcicki, A.; Wan, E.; Powell, C., II; Prentice, C. S.

    2012-12-01

    The marine to non-marine transgressional - regressional Ohlson Ranch Formation of northern California was deposited mainly east of the San Andreas Fault and the Gualala structural block during Pliocene sea level high stands. The formation transitions eastward from marine to fluvial deposits and the marine strata are deposited on a mildly warped, pholad-bored erosional surface cut near Pliocene sea level (probably above storm wave-base), on rocks of the Coastal and Central belts of the Franciscan Complex. West of the San Andreas fault near Point Arena, a right-laterally displaced remnant of the wave-cut surface occurs at ca. 100m above modern sea level. East of the fault this surface varies in elevation from ca. 200-350m and a 12-15 cm thick light gray silicic tephra, the ash of Ohlson Ranch (AOR) locally occurs ~10m above the base of the marine section. The AOR consists of very fine-grained glass shards with conspicuous brown biotite in the upper 2 cm and rare co-magmatic clinopyroxene, hornblende and euhedral, weakly zoned zircons. The zircons are relatively uniform in size and little abraded, suggesting they are primary and not re-worked. The fine-grained nature of the AOR deposit suggests it is water lain and chemical analysis of the volcanic glass indicates that the eruptive source was in the southern Cascade Range. We analyzed both polished section mounts of zircon crystals and unpolished rims by ion microprobe (SHRIMP-RG) and LA-ICPMS in order to establish a precise U-Pb age for the AOR. Ages were adjusted for initial 230Th deficiency in the U-Pb chain using Th/U measured in zircon and host glass shards. Thirty-two zircon grains measured by LA-ICPMS at the University of Arizona LaserChron Center yield a mean U-Pb age of 4.58 ± 0.30 Ma (2σ , MSWD=0.53, n=23). SHRIMP analyses of zircon interiors exposed in polished epoxy-mounts yield a mean U-Pb age of 4.36 ± 0.11 Ma (2σ, MSWD 0.72, n=19). To further refine the likely eruption age of the AOR, the SHRIMP was

  20. La chapelle de la résidence universitaire Jean-Zay à Antony (Hauts-de-Seine par Eugène Beaudouin : matériau traditionnel de l’architecture religieuse et création contemporaine

    Directory of Open Access Journals (Sweden)

    Florence Margo-Schwoebel

    2009-11-01

    Full Text Available Après avoir mené à Antony la construction de la résidence universitaire Jean Zay en dix-huit mois (1954-1955, grâce à des procédés de construction industrialisés, Eugène Beaudouin compléta son projet d’une chapelle indépendante, réalisée selon des procédés traditionnels et consacrée en 1961. Dans cette chapelle Sainte-Croix, l’architecte renouait avec une certaine approche historiciste, sans pour autant rompre avec la création contemporaine. Son goût affirmé pour la prédominance du dessin s’y conjuguait à un jeu subtil sur la notion de « vérité du matériau », chère à l’architecture de la seconde moitié du XXe siècle. Mais le parti pris architectural semi-souterrain lui permettait surtout de développer un espace liturgique dramatisé, autour de la symbolique du baptême, en rapport direct avec les grands projets contemporains d’architecture religieuse.Using industrialised construction techniques, the architect Eugène Beaudouin was able to complete the building of the Jean Zay university residence, at Antony, in eighteen months, between 1954 and 1955. After completing this hall of residence, the architect then designed an independent chapel, built with traditional techniques and consecrated in 1961. In this Sainte-Croix chapel, Beaudouin renewed a certain historicist approach although he did not turn his back on contemporary creation. His pronounced taste for the predominance of design was associated with a subtle play on the notion of ‘the truth of the material’, one of the key architectural precepts of the second half of the 20th century. But the half-underground architecture also allowed him to create a dramatised liturgical space, around the symbolism of baptism and in relation to other contemporary projects in religious architecture.

  1. Generalized unitaries and the Picard group

    Indian Academy of Sciences (India)

    Home; Journals; Proceedings – Mathematical Sciences; Volume 116; Issue 4 ... After discussing some basic facts about generalized module maps, we use the representation theory of the algebra B B a ( E ) of adjointable operators on a Hilbert B -module to show that the quotient of the group of generalized unitaries on  ...

  2. Generalized unitaries and the Picard group

    Indian Academy of Sciences (India)

    Our motivation for these notes is to study one-parameter groups of generalized unitaries and to prepare the terrain for the ... have in mind the tensor product will be the key ingredient of the approach. We comment on these ideas at ... The two properties of iϕ mentioned before Observation 1.2 motivate the following definition.

  3. Generalized unitaries and the Picard group

    Indian Academy of Sciences (India)

    the representation theory of the algebra Ba(E) of adjointable operators on a Hilbert. B-module E to show that the ... we prove that a ϕ-linear map factors into the canonical map from E into its extension via. ϕ and a usual module map. ...... Let us indicate by x∗ ⊙i y an elementary tensor in E∗ ⊙ϑi E. One easily checks that x∗ ...

  4. Characterization of the San Andreas Fault near Parkfield, California by fault-zone trapped waves

    Science.gov (United States)

    Li, Y.; Vidale, J.; Cochran, E.

    2003-04-01

    In October, 2002, coordinated by the Pre-EarthScope/SAFOD, we conducted an extensive seismic experiment at the San Andreas fault (SAF), Parkfield to record fault-zone trapped waves generated by explosions and microearthquakes using dense linear seismic arrays of 52 PASSCAL 3-channel REFTEKs deployed across and along the fault zone. We detonated 3 explosions within and out of the fault zone during the experiment, and also recorded other 13 shots of PASO experiment of UWM/RPI (Thurber and Roecker) detonated around the SAFOD drilling site at the same time. We observed prominent fault-zone trapped waves with large amplitudes and long duration following S waves at stations close to the main fault trace for sources located within and close to the fault zone. Dominant frequencies of trapped waves are 2-3 Hz for near-surface explosions and 4-5 Hz for microearthquakes. Fault-zone trapped waves are relatively weak on the north strand of SAF for same sources. In contrast, seismograms registered for both the stations and shots far away from the fault zone show a brief S wave and lack of trapped waves. These observations are consistent with previous findings of fault-zone trapped waves at the SAF [Li et al., 1990; 1997], indicating the existence of a well-developed low-velocity waveguide along the main fault strand (principal slip plan) of the SAF. The data from denser arrays and 3-D finite-difference simulations of fault-zone trapped waves allowed us to delineate the internal structure, segmentation and physical properties of the SAF with higher resolution. The trapped-wave inferred waveguide on the SAF Parkfield segment is ~150 m wide at surface and tapers to ~100 m at seismogenic depth, in which Q is 20-50 and S velocities are reduced by 30-40% from wall-rock velocities, with the greater velocity reduction at the shallow depth and to southeast of the 1966 M6 epicenter. We interpret this low-velocity waveguide on the SAF main strand as being the remnant of damage zone caused

  5. Andrea Pasta (1706-1782), eclectic scholar of anatomy and clinical medicine, communication and the history of art.

    Science.gov (United States)

    Clerici, Carlo Alfredo; Veneroni, Laura; Patriarca, Carlo

    2014-11-01

    Andrea Pasta was an eclectic visionary light years ahead of his time. He made numerous contributions to the field of medicine, some recognized by his contemporaries and others so visionary that they are being applied only in modern times. His contributions spanned the disciplines of psychology, gynaecology, haematology, infectious diseases and the doctor-patient relationship. Well known among his contemporaries, he combined a passion for clinical medicine and a keen interest in history and art with a strict research methodology and an approach to caring for patients as human beings. By studying his life and works, we can better understand the magnitude and significance of his innovative method and its applicability in modern times and also the significance of his many contributions. © The Author(s) 2013 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.

  6. Bimaterial interfaces in the south San Andreas Fault with opposite velocity contrasts NW and SE from San Gorgonio Pass

    Science.gov (United States)

    Share, Pieter-Ewald; Ben-Zion, Yehuda

    2016-10-01

    Analysis of fault zone head waves indicates the existence of two deep large-scale bimaterial interfaces in the structure of the southern San Andreas Fault (SAF) with opposite sense of velocity contrast. One interface extends from the Cajon Pass area to the San Gorgonio Pass (SGP) region and is associated with a slower seismic velocity on the southwest side of the SAF. The second interface extends from the SGP region to the Coachella Valley and involves a slower seismic velocity on the northeast side. Tomographic imaging of alternating velocity structures supports the velocity contrast reversal across the SAF. The observations and expected properties of bimaterial ruptures suggest that earthquakes nucleating slightly to the NW and SE of SGP tend to propagate along the SAF in the opposite along-strike directions. This is consistent with geological and seismological evidence in the Mojave and southernmost sections of the SAF.

  7. Slip deficit on the san andreas fault at parkfield, california, as revealed by inversion of geodetic data.

    Science.gov (United States)

    Segall, P; Harris, R

    1986-09-26

    A network of geodetic lines spanning the San Andreas fault near the rupture zone of the 1966 Parkfield, California, earthquake (magnitude M = 6) has been repeatedly surveyed since 1959. In the study reported here the average rates of line-length change since 1966 were inverted to determine the distribution of interseismic slip rate on the fault. These results indicate that the Parkfield rupture surface has not slipped significantly since 1966. Comparison of the geodetically determined seismic moment of the 1966 earthquake with the interseismic slip-deficit rate suggests that the strain released by the latest shock will most likely be restored between 1984 and 1989, although this may not occur until 1995. These results lend independent support to the earlier forecast of an M = 6 earthquake near Parkfield within 5 years of 1988.

  8. Interaction of the san jacinto and san andreas fault zones, southern california: triggered earthquake migration and coupled recurrence intervals.

    Science.gov (United States)

    Sanders, C O

    1993-05-14

    Two lines of evidence suggest that large earthquakes that occur on either the San Jacinto fault zone (SJFZ) or the San Andreas fault zone (SAFZ) may be triggered by large earthquakes that occur on the other. First, the great 1857 Fort Tejon earthquake in the SAFZ seems to have triggered a progressive sequence of earthquakes in the SJFZ. These earthquakes occurred at times and locations that are consistent with triggering by a strain pulse that propagated southeastward at a rate of 1.7 kilometers per year along the SJFZ after the 1857 earthquake. Second, the similarity in average recurrence intervals in the SJFZ (about 150 years) and in the Mojave segment of the SAFZ (132 years) suggests that large earthquakes in the northern SJFZ may stimulate the relatively frequent major earthquakes on the Mojave segment. Analysis of historic earthquake occurrence in the SJFZ suggests little likelihood of extended quiescence between earthquake sequences.

  9. Deep-water turbidites as Holocene earthquake proxies: the Cascadia subduction zone and Northern San Andreas Fault systems

    Directory of Open Access Journals (Sweden)

    J. E. Johnson

    2003-06-01

    Full Text Available New stratigraphic evidence from the Cascadia margin demonstrates that 13 earthquakes ruptured the margin from Vancouver Island to at least the California border following the catastrophic eruption of Mount Mazama. These 13 events have occurred with an average repeat time of ?? 600 years since the first post-Mazama event ?? 7500 years ago. The youngest event ?? 300 years ago probably coincides with widespread evidence of coastal subsidence and tsunami inundation in buried marshes along the Cascadia coast. We can extend the Holocene record to at least 9850 years, during which 18 events correlate along the same region. The pattern of repeat times is consistent with the pattern observed at most (but not all localities onshore, strengthening the contention that both were produced by plate-wide earthquakes. We also observe that the sequence of Holocene events in Cascadia may contain a repeating pattern, a tantalizing look at what may be the long-term behavior of a major fault system. Over the last ?? 7500 years, the pattern appears to have repeated at least three times, with the most recent A.D. 1700 event being the third of three events following a long interval of 845 years between events T4 and T5. This long interval is one that is also recognized in many of the coastal records, and may serve as an anchor point between the offshore and onshore records. Similar stratigraphic records are found in two piston cores and one box core from Noyo Channel, adjacent to the Northern San Andreas Fault, which show a cyclic record of turbidite beds, with thirty- one turbidite beds above a Holocene/.Pleistocene faunal «datum». Thus far, we have determined ages for 20 events including the uppermost 5 events from these cores. The uppermost event returns a «modern» age, which we interpret is likely the 1906 San Andreas earthquake. The penultimate event returns an intercept age of A.D. 1664 (2 ?? range 1505- 1822. The third event and fourth event

  10. Application of Remote Sensing Data to Correlating Alluvial Fans along the southern San Andreas Fault at Devers Hill, CA

    Science.gov (United States)

    Salin, A.; Behr, W. M.; Gold, P. O.

    2013-12-01

    The overall rate of motion along the Pacific-North American plate boundary is well constrained from GPS data, but the distribution of this motion among the various faults of the San Andreas Fault System is not well understood, particularly in southern California. An especially complex and poorly understood part of the southern San Andreas Fault (sSAF) in southern California is along the Banning strand at the northwest end of the Coachella Valley near San Gorgonio Pass. Presently, slip rates for this part of the sSAF are entirely unconstrained, but are critical to earthquake forecasting efforts. Here we examine several displaced features along the Banning strand of the sSAF at a site known as Devers Hill, focusing primarily on Quaternary alluvial fans of varying ages. A first step in accurately deriving a slip rate for this location is to correlate these fan segments across the fault. To compare and correlate different offset features, we use several forms of remote sensing, including 0.5-m-resolution LiDAR data from the B4 dataset, 2- to 5-m-resolution MODIS/ASTER (MASTER) multispectral imagery, and high-resolution aerial photographs. These datasets allow us to quantitatively determine a) surface roughness, b) drainage density and morphology, and c) boulder distributions, sizes and concentrations. The remote sensing data we collect will be compared to independent correlations of offset features based on cosmogenic Be-10 dating of boulder tops and cobbles, as well as field-based measurements of surface characteristics too subtle for remote sensing imagery (see Gold et al. abstract submitted to Session T009, this meeting). We also use the remote-sensing data sets to investigate other types of offset features at other sites along the sSAF.

  11. Activity of the Mill Creek and Mission Creek fault strands of the San Andreas fault through the San Gorgonio Pass

    Science.gov (United States)

    Morelan, A. E., III; Oskin, M. E.; Valentine, M.

    2016-12-01

    We present new observations that constrain the recent slip history of the Mill Creek and Mission Creek strands of the San Andreas fault. These faults are the northern strands of a complex series of strike-slip and thrust faults through the San Gorgonio Pass stepover, an important structural barrier that affects seismic hazard in southern California. Understanding the activity on each of the faults in this complex region will reveal the potential for large, throughgoing San Andreas fault ruptures. The Mill Creek fault strand cuts the base of the upper Raywood Flat fill, a 50 m thick package of debris-flow deposits. However, the upper section of these deposits overlap, and are not cut by the fault. On the surface of this deposit, a 15 m-wide channel, flanked by bouldery debris-flow levees, crosses the projection of the Mill Creek fault without evidence of offset. We collected boulder-top samples for cosmogenic exposure age-dating of these levees and present preliminary results. Additionally, we mapped inset terraces along the incised channel of the East Fork Whitewater River drainage that also do not show evidence of fault offset, and we collected a depth profile through the uppermost Raywood Flat fill in order to further assess its age. Along the Mission Creek strand, newly devegetated B4 airborne lidar data reveals fault scarps cutting across hillslopes and alluvial fans between the San Bernardino strand and lower Raywood Flat for a distance of 4 km. We identify a lateral offset of 4-6 m in an alluvial fan deposit within a tributary of Banning canyon, and sampled a suite of boulders to estimate the age of this deposit. This site shows that the Mission Creek fault is active and could rupture through the San Gorgonio Pass, bypassing the structural complexity of the San Gorgonio Pass thrust to the south. Conversely, the Mill Creek fault appears to be inactive through the pass since the latest Pleistocene.

  12. On Offset Stream Measurements and Recent Coseismic Surface Rupture in the Carrizo Section of the San Andreas Fault

    Science.gov (United States)

    Brooks, B. A.; Hudnut, K. W.; Akciz, S. O.; Delano, J.; Glennie, C. L.; Prentice, C. S.; DeLong, S.

    2013-12-01

    Recent studies using airborne laser swath mapping (ALSM) topographic data have provoked debate about whether the Mw 7.9 Fort Tejon 1857 earthquake produced ~5m or ~10m of surface strike-slip displacement in the Carrizo section of the south-central San Andreas fault. Resolution of this discrepancy is important not only for understanding the proposed role of the Carrizo section in controlling repeated south-central San Andreas rupture but also for understanding the general utility of stream offset measurements for earthquake process studies. To explore if higher-resolution topographic data of the offset features would help reconcile the different interpretations, we used a mobile laser scanning (MLS) backpack-mounted system to survey 11 ~5m offset streams given 'high' quality rankings by previous studies. In our surveys, point density was on the order of 1000s pts/m^2 in comparison to 1-4 pts/m^2 for the ALSM data, enabling us to faithfully make digital elevation models with grid spacing smaller than 10cm. We adapt a geometric method that relies on a small number of user-dependent decisions to produce an offset estimate from a set of geomorphic markers (thalweg, channel margins, channel shoulders) from upstream and downstream locations. We typically derive an ensemble of at least 10 offset measurements per stream channel and from these calculate a mean and standard deviation. We also explore using gradient changes in long profiles of the offset stream reaches to diagnose the possibility of a ~10m channel experiencing 2 ~5m slip events. Preliminary results suggest a tendency towards the higher value offset estimates, although this does not necessarily preclude the possibility of two or more events causing the cumulative offset.

  13. Origin and spatial distribution of gas at seismogenic depths of the San Andreas Fault from drill-mud gas analysis

    International Nuclear Information System (INIS)

    Wiersberg, Thomas; Erzinger, Joerg

    2008-01-01

    Data are presented on the molecular composition of drill-mud gas from the lower sedimentary section (1800-3987 m) of the SAFOD (San Andreas Fault Observatory at Depth) Main Hole measured on-line during drilling, as well as C and H isotope data from off-line mud gas samples. Hydrocarbons, H 2 and CO 2 are the most abundant non-atmospheric gases in drill-mud when drilling seismogenic zones. Gas influx into the well at depth is related to the lithology and permeability of the drilled strata: larger formation gas influx was detected when drilling through organic-rich shales and permeable sandstones. The SAF (San Andreas Fault), encountered between approximately 3100 m and 3450 m borehole depth, is generally low in gas, but is encompassed by two gas-rich zones (2700-2900 m and below 3550 m) at the fault margins with enhanced 222 Rn activities and distinct gas compositions. Within the fault, two interstratified gas-rich lenses (3150-3200 m and 3310-3340 m) consist of CO 2 and hydrocarbons (upper zone), but almost exclusively of hydrocarbons (lower zone). The isotopic composition indicates an organic source of hydrocarbons and CO 2 in the entire sedimentary section of the well. Hydrocarbons in sedimentary strata are partly of microbial origin down to ∼2500 m borehole depth. The contribution of thermogenic gas increases between ∼2500 m and 3200 m. Below ∼3200 m, hydrocarbons fully derive from thermal degradation of organic matter. The lack of H 2 in the center of the fault and the high concentration of H 2 in the fractured zones at the fault margins are consistent with H 2 formation by interaction of water with fresh silica mineral surfaces generated by tectonic activities, however, this needs to be verified by laboratory experiments. Based on these studies, it is concluded that the fault zone margins consist of strata with enhanced permeability, separated by a low-permeability fault center

  14. A large mantle water source for the northern San Andreas Fault System: A ghost of subduction past

    Science.gov (United States)

    Kirby, Stephen H.; Wang, Kelin; Brocher, Thomas M.

    2014-01-01

    Recent research indicates that the shallow mantle of the Cascadia subduction margin under near-coastal Pacific Northwest U.S. is cold and partially serpentinized, storing large quantities of water in this wedge-shaped region. Such a wedge probably formed to the south in California during an earlier period of subduction. We show by numerical modeling that after subduction ceased with the creation of the San Andreas Fault System (SAFS), the mantle wedge warmed, slowly releasing its water over a period of more than 25 Ma by serpentine dehydration into the crust above. This deep, long-term water source could facilitate fault slip in San Andreas System at low shear stresses by raising pore pressures in a broad region above the wedge. Moreover, the location and breadth of the water release from this model gives insights into the position and breadth of the SAFS. Such a mantle source of water also likely plays a role in the occurrence of Non-Volcanic Tremor (NVT) that has been reported along the SAFS in central California. This process of water release from mantle depths could also mobilize mantle serpentinite from the wedge above the dehydration front, permitting upward emplacement of serpentinite bodies by faulting or by diapiric ascent. Specimens of serpentinite collected from tectonically emplaced serpentinite blocks along the SAFS show mineralogical and structural evidence of high fluid pressures during ascent from depth. Serpentinite dehydration may also lead to tectonic mobility along other plate boundaries that succeed subduction, such as other continental transforms, collision zones, or along present-day subduction zones where spreading centers are subducting.

  15. Subsurface geometry of the San Andreas-Calaveras fault junction: influence of serpentinite and the Coast Range Ophiolite

    Science.gov (United States)

    Watt, Janet Tilden; Ponce, David A.; Graymer, Russell W.; Jachens, Robert C.; Simpson, Robert W.

    2014-01-01

    While an enormous amount of research has been focused on trying to understand the geologic history and neotectonics of the San Andreas-Calaveras fault (SAF-CF) junction, fundamental questions concerning fault geometry and mechanisms for slip transfer through the junction remain. We use potential-field, geologic, geodetic, and seismicity data to investigate the 3-D geologic framework of the SAF-CF junction and identify potential slip-transferring structures within the junction. Geophysical evidence suggests that the San Andreas and Calaveras fault zones dip away from each other within the northern portion of the junction, bounding a triangular-shaped wedge of crust in cross section. This wedge changes shape to the south as fault geometries change and fault activity shifts between fault strands, particularly along the Calaveras fault zone (CFZ). Potential-field modeling and relocated seismicity suggest that the Paicines and San Benito strands of the CFZ dip 65° to 70° NE and form the southwest boundary of a folded 1 to 3 km thick tabular body of Coast Range Ophiolite (CRO) within the Vallecitos syncline. We identify and characterize two steeply dipping, seismically active cross structures within the junction that are associated with serpentinite in the subsurface. The architecture of the SAF-CF junction presented in this study may help explain fault-normal motions currently observed in geodetic data and help constrain the seismic hazard. The abundance of serpentinite and related CRO in the subsurface is a significant discovery that not only helps constrain the geometry of structures but may also help explain fault behavior and the tectonic evolution of the SAF-CF junction.

  16. Structure of the 1906 near-surface rupture zone of the San Andreas Fault, San Francisco Peninsula segment, near Woodside, California

    Science.gov (United States)

    Rosa, C.M.; Catchings, R.D.; Rymer, M.J.; Grove, Karen; Goldman, M.R.

    2016-07-08

    High-resolution seismic-reflection and refraction images of the 1906 surface rupture zone of the San Andreas Fault near Woodside, California reveal evidence for one or more additional near-surface (within about 3 meters [m] depth) fault strands within about 25 m of the 1906 surface rupture. The 1906 surface rupture above the groundwater table (vadose zone) has been observed in paleoseismic trenches that coincide with our seismic profile and is seismically characterized by a discrete zone of low P-wave velocities (Vp), low S-wave velocities (Vs), high Vp/Vs ratios, and high Poisson’s ratios. A second near-surface fault strand, located about 17 m to the southwest of the 1906 surface rupture, is inferred by similar seismic anomalies. Between these two near-surface fault strands and below 5 m depth, we observed a near-vertical fault strand characterized by a zone of high Vp, low Vs, high Vp/Vs ratios, and high Poisson’s ratios on refraction tomography images and near-vertical diffractions on seismic-reflection images. This prominent subsurface zone of seismic anomalies is laterally offset from the 1906 surface rupture by about 8 m and likely represents the active main (long-term) strand of the San Andreas Fault at 5 to 10 m depth. Geometries of the near-surface and subsurface (about 5 to 10 m depth) fault zone suggest that the 1906 surface rupture dips southwestward to join the main strand of the San Andreas Fault at about 5 to 10 m below the surface. The 1906 surface rupture forms a prominent groundwater barrier in the upper 3 to 5 m, but our interpreted secondary near-surface fault strand to the southwest forms a weaker barrier, suggesting that there has been less or less-recent near-surface slip on that strand. At about 6 m depth, the main strand of the San Andreas Fault consists of water-saturated blue clay (collected from a hand-augered borehole), which is similar to deeply weathered serpentinite observed within the main strand of the San Andreas Fault at

  17. 18 September 2012 - PD Dr. med. Andreas Trojan Researcher, University of Zürich and Mr Marc Forster Independant Swiss Movie Director Switzerland visiting the CMS underground area with Head of international Relations F. Pauss and CMS Collaboration Z. Szillasi.

    CERN Multimedia

    Jean-Claude Gadmer

    2012-01-01

    18 September 2012 - PD Dr. med. Andreas Trojan Researcher, University of Zürich and Mr Marc Forster Independant Swiss Movie Director Switzerland visiting the CMS underground area with Head of international Relations F. Pauss and CMS Collaboration Z. Szillasi.

  18. Mr. Lorenzo Dellai, presidente della provincia Autonoma di Trento and Professor Andrea Zanotti, president dell'Instituto Trentino di Cultura, visit ALICE experiment underground area and Pixel Silicon Laboratory

    CERN Document Server

    Claudia Marcelloni

    2006-01-01

    Mr. Lorenzo Dellai, presidente della provincia Autonoma di Trento and Professor Andrea Zanotti, president dell'Instituto Trentino di Cultura, visit ALICE experiment underground area and Pixel Silicon Laboratory

  19. Geomorphology, denudation rates, and stream channel profiles reveal patterns of mountain building adjacent to the San Andreas fault in northern California, USA

    Science.gov (United States)

    DeLong, Stephen B.; Hilley, George E.; Prentice, Carol S.; Crosby, Christopher J.; Yokelson, Intan N.

    2017-01-01

    Relative horizontal motion along strike-slip faults can build mountains when motion is oblique to the trend of the strike-slip boundary. The resulting contraction and uplift pose off-fault seismic hazards, which are often difficult to detect because of the poor vertical resolution of satellite geodesy and difficulty of locating offset datable landforms in active mountain ranges. Sparse geomorphic markers, topographic analyses, and measurement of denudation allow us to map spatiotemporal patterns of uplift along the northern San Andreas fault. Between Jenner and Mendocino, California, emergent marine terraces found southwest of the San Andreas fault record late Pleistocene uplift rates between 0.20 and 0.45 mm yr–1 along much of the coast. However, on the northeast side of the San Andreas fault, a zone of rapid uplift (0.6–1.0 mm yr–1) exists adjacent to the San Andreas fault, but rates decay northeastward as the coast becomes more distant from the San Andreas fault. A newly dated 4.5 Ma shallow-marine deposit located at ∼500 m above sea level (masl) adjacent to the San Andreas fault is warped down to just 150 masl 15 km northeast of the San Andreas fault, and it is exposed at just 60–110 masl to the west of the fault. Landscape denudation rates calculated from abundance of cosmogenic radionuclides in fluvial sediment northeast of, and adjacent to, the San Andreas fault are 0.16–0.29 mm yr–1, but they are only 0.03–0.07 mm yr–1 west of the fault. Basin-average channel steepness and the denudation rates can be used to infer the erosive properties of the underlying bedrock. Calibrated erosion rates can then be estimated across the entire landscape using the spatial distribution of channel steepness with these erosive properties. The lower-elevation areas of this landscape that show high channel steepness (and hence calibrated erosion rate) are distinct from higher-elevation areas with systematically lower channel steepness and denudation rates

  20. [Christian Andreas Cothenius (1708-1789). A pro-memoria on the occasion of the 200th anniversary of his death].

    Science.gov (United States)

    Völker, A

    1990-04-01

    The 200th anniversary of the death of Christian Andreas Cothenius gave occasion to appreciate life and work of this personage of a physician. Cothenius maintained manifold connections to Halle, of which the golden doctorate and the heritage of the pharmaceutic enterprises of his teacher Friedrich Hoffmann were treated in this place. The picture of the local relations was supplemented by the history of the Cothenius medal which is today awarded by the Leopoldina of Halle.

  1. THE USE OF DOMESTICATION AND FOREIGNIZATION IN ANDREA HIRATA‘S LASKAR PELANGI AND ITS TRANSLATION INTO ENGLISH ―THE RAINBOW TROOPS‖

    OpenAIRE

    Izzati Gemi Seinsiani; Dies Oktavia

    2017-01-01

    This paper aimed to investigate the use of foreignization and domestication strategy in translating the cultural words in Andrea Hirata‘s ―Laskar Pelangi‖ and its translation in English ―The Rainbow Troops‖. The method used in this study was descriptive qualitative method by applying the steps of data analysis. They were collecting data, analyzing data, and drawing conclusion. The data were gathered through library research by reading the novel thoroughly, and then continued by...

  2. (U-Th)/He thermochronometry reveals Pleistocene punctuated deformation and synkinematic hematite mineralization in the Mecca Hills, southernmost San Andreas Fault zone

    Science.gov (United States)

    Moser, Amy C.; Evans, James P.; Ault, Alexis K.; Janecke, Susanne U.; Bradbury, Kelly K.

    2017-10-01

    The timing, tempo, and processes of punctuated deformation in strike-slip fault systems are challenging to resolve in the rock record. Faults in the Mecca Hills, adjacent to the southernmost San Andreas Fault, California, accommodate active deformation and exhumation in the Plio-Pleistocene sedimentary rocks and underlying crystalline basement. We document the spatiotemporal patterns of San Andreas Fault-related deformation as recorded in crystalline basement rocks of the Mecca Hills using fault microstructural observations, geochemical data, and hematite (n = 24) and apatite (n = 44) (U-Th)/He (hematite He, apatite He) thermochronometry data. Reproducible mean hematite He dates from minor hematite-coated fault surfaces in the Painted Canyon Fault damage zone range from ∼0.7-0.4 Ma and are younger than ∼1.2 Ma apatite He dates from adjacent crystalline basement host rock. These data reveal concomitant Pleistocene pulses of fault slip, fluid flow, and synkinematic hematite mineralization. Hematite textures, crystal morphology, and hematite He data patterns imply some damage zone deformation occurred via cyclic crack-seal and creep processes. Apatite He data from crystalline basement define distinct date-eU patterns and indicate cooling across discrete fault blocks in the Mecca Hills. Uniform ∼1.2 Ma apatite He dates regardless of eU are located exclusively between the Painted Canyon and Platform faults. Outside of this fault block, samples yield individual apatite He dates from ∼30-1 Ma that define a positive apatite He date-eU correlation. These patterns reveal focused exhumation away from the main trace of the San Andreas Fault at ∼1.2 Ma. Low-temperature thermochronometry of fault-related rocks provides an unprecedented window into the 105-106-yr record of San Andreas Fault-related deformation in the Mecca Hills and documents hematite deformation mechanisms that may be operative in other strike-slip faults world-wide.

  3. Ductile shear zones beneath strike-slip faults: Implications for the thermomechanics of the San Andreas fault zone

    Science.gov (United States)

    Thatcher, W.; England, P.C.

    1998-01-01

    We have carried out two-dimensional (2-D) numerical experiments on the bulk flow of a layer of fluid that is driven in a strike-slip sense by constant velocities applied at its boundaries. The fluid has the (linearized) conventional rheology assumed to apply to lower crust/upper mantle rocks. The temperature dependence of the effective viscosity of the fluid and the shear heating that accompanies deformation have been incorporated into the calculations, as has thermal conduction in an overlying crustal layer. Two end-member boundary conditions have been considered, corresponding to a strong upper crust driving a weaker ductile substrate and a strong ductile layer driving a passive, weak crust. In many cases of practical interest, shear heating is concentrated close to the axial plane of the shear zone for either boundary condition. For these cases, the resulting steady state temperature field is well approximated by a cylindrical heat source embedded in a conductive half-space at a depth corresponding to the top of the fluid layer. This approximation, along with the application of a theoretical result for one-dimensional shear zones, permits us to obtain simple analytical approximations to the thermal effects of 2-D ductile shear zones for a range of assumed rheologies and crustal geotherms, making complex numerical calculations unnecessary. Results are compared with observable effects on heat flux near the San Andreas fault using constraints on the slip distribution across the entire fault system. Ductile shearing in the lower crust or upper mantle can explain the observed increase in surface heat flux southeast of the Mendocino triple junction and match the amplitude of the regional heat flux anomaly in the California Coast Ranges. Because ductile dissipation depends only weakly on slip rate, faults moving only a few millimeters per year can be important heat sources, and the superposition of effects of localized ductile shearing on both currently active and now

  4. Balloon Angioplasty – The Legacy of Andreas Grüntzig, M.D. (1939–1985)

    Science.gov (United States)

    Barton, Matthias; Grüntzig, Johannes; Husmann, Marc; Rösch, Josef

    2014-01-01

    In 1974, at the Medical Policlinic of the University of Zürich, German-born physician-scientist Andreas Grüntzig (1939–1985) for the first time applied a balloon-tipped catheter to re-open a severely stenosed femoral artery, a procedure, which he initially called “percutaneous transluminal dilatation”. Balloon angioplasty as a therapy of atherosclerotic vascular disease, for which Grüntzig and Charles T. Dotter (1920–1985) received a nomination for the Nobel Prize in Physiology or Medicine in 1978, became one of the most successful examples of translational medicine in the twentieth century. Known today as percutaneous transluminal angioplasty (PTA) in peripheral arteries or percutaneous transluminal coronary angioplasty (PTCA) or percutaneous coronary intervention (PCI) in coronary arteries, balloon angioplasty has become the method of choice to treat patients with acute myocardial infarction or occluded leg arteries. On the occasion of the 40th anniversary of balloon angioplasty, we summarize Grüntzig’s life and career in Germany, Switzerland, and the United States and also review the developments in vascular medicine from the 1890s to the 1980s, including Dotter’s first accidental angioplasty in 1963. The work of pioneers of catheterization, including Pedro L. Fariñas in Cuba, André F. Cournand in France, Werner Forssmann, Werner Porstmann and Eberhard Zeitler in Germany, António Egas Moniz and Reynaldo dos Santos in Portugal, Sven-Ivar Seldinger in Sweden, and Barney Brooks, Thomas J. Fogarty, Melvin P. Judkins, Richard K. Myler, Dickinson W. Richards, and F. Mason Sones in the United States, is discussed. We also present quotes by Grüntzig and excerpts from his unfinished autobiography, statements of Grüntzig’s former colleagues and contemporary witnesses, and have included hitherto unpublished historic photographs and links to archive recordings and historic materials. This year, on June 25, 2014, Andreas Grüntzig would have celebrated

  5. Re-evaluating fault zone evolution, geometry, and slip rate along the restraining bend of the southern San Andreas Fault Zone

    Science.gov (United States)

    Blisniuk, K.; Fosdick, J. C.; Balco, G.; Stone, J. O.

    2017-12-01

    This study presents new multi-proxy data to provide an alternative interpretation of the late -to-mid Quaternary evolution, geometry, and slip rate of the southern San Andreas fault zone, comprising of the Garnet Hill, Banning, and Mission Creek fault strands, along its restraining bend near the San Bernardino Mountains and San Gorgonio Pass. Present geologic and geomorphic studies in the region indicate that as the Mission Creek and Banning faults diverge from one another in the southern Indio Hills, the Banning Fault Strand accommodates the majority of lateral displacement across the San Andreas Fault Zone. In this currently favored kinematic model of the southern San Andreas Fault Zone, slip along the Mission Creek Fault Strand decreases significantly northwestward toward the San Gorgonio Pass. Along this restraining bend, the Mission Creek Fault Strand is considered to be inactive since the late -to-mid Quaternary ( 500-150 kya) due to the transfer of plate boundary strain westward to the Banning and Garnet Hills Fault Strands, the Jacinto Fault Zone, and northeastward, to the Eastern California Shear Zone. Here, we present a revised geomorphic interpretation of fault displacement, initial 36Cl/10Be burial ages, sediment provenance data, and detrital geochronology from modern catchments and displaced Quaternary deposits that improve across-fault correlations. We hypothesize that continuous large-scale translation of this structure has occurred throughout its history into the present. Accordingly, the Mission Creek Fault Strand is active and likely a primary plate boundary fault at this latitude.

  6. Correlation of clayey gouge in a surface exposure of the San Andreas fault with gouge at depth from SAFOD: Implications for the role of serpentinite in fault mechanics

    Science.gov (United States)

    Moore, Diane E.; Rymer, Michael J.

    2012-01-01

    Magnesium-rich clayey gouge similar to that comprising the two actively creeping strands of the San Andreas Fault in drill core from the San Andreas Fault Observatory at Depth (SAFOD) has been identified in a nearby outcrop of serpentinite within the fault zone at Nelson Creek. Each occurrence of the gouge consists of porphyroclasts of serpentinite and sedimentary rocks dispersed in a fine-grained, foliated matrix of Mg-rich smectitic clays. The clay minerals in all three gouges are interpreted to be the product of fluid-assisted, shear-enhanced reactions between quartzofeldspathic wall rocks and serpentinite that was tectonically entrained in the fault from a source in the Coast Range Ophiolite. We infer that the gouge at Nelson Creek connects to one or both of the gouge zones in the SAFOD core, and that similar gouge may occur at depths in between. The special significance of the outcrop is that it preserves the early stages of mineral reactions that are greatly advanced at depth, and it confirms the involvement of serpentinite and the Mg-rich phyllosilicate minerals that replace it in promoting creep along the central San Andreas Fault.

  7. Holocene slip rates along the San Andreas Fault System in the San Gorgonio Pass and implications for large earthquakes in southern California

    Science.gov (United States)

    Heermance, Richard V.; Yule, Doug

    2017-06-01

    The San Gorgonio Pass (SGP) in southern California contains a 40 km long region of structural complexity where the San Andreas Fault (SAF) bifurcates into a series of oblique-slip faults with unknown slip history. We combine new 10Be exposure ages (Qt4: 8600 (+2100, -2200) and Qt3: 5700 (+1400, -1900) years B.P.) and a radiocarbon age (1260 ± 60 years B.P.) from late Holocene terraces with scarp displacement of these surfaces to document a Holocene slip rate of 5.7 (+2.7, -1.5) mm/yr combined across two faults. Our preferred slip rate is 37-49% of the average slip rates along the SAF outside the SGP (i.e., Coachella Valley and San Bernardino sections) and implies that strain is transferred off the SAF in this area. Earthquakes here most likely occur in very large, throughgoing SAF events at a lower recurrence than elsewhere on the SAF, so that only approximately one third of SAF ruptures penetrate or originate in the pass.Plain Language SummaryHow large are earthquakes on the southern San Andreas Fault? The answer to this question depends on whether or not the earthquake is contained only along individual fault sections, such as the Coachella Valley section north of Palm Springs, or the rupture crosses multiple sections including the area through the San Gorgonio Pass. We have determined the age and offset of faulted stream deposits within the San Gorgonio Pass to document slip rates of these faults over the last 10,000 years. Our results indicate a long-term slip rate of 6 mm/yr, which is almost 1/2 of the rates east and west of this area. These new rates, combined with faulted geomorphic surfaces, imply that large magnitude earthquakes must occasionally rupture a 300 km length of the San Andreas Fault from the Salton Sea to the Mojave Desert. Although many ( 65%) earthquakes along the southern San Andreas Fault likely do not rupture through the pass, our new results suggest that large >Mw 7.5 earthquakes are possible on the southern San Andreas Fault and likely

  8. Ambient Noise Tomography of Southern California Images Dipping San Andreas-Parallel Structure and Low-Velocity Salton Trough Mantle

    Science.gov (United States)

    Barak, S.; Klemperer, S. L.; Lawrence, J. F.

    2014-12-01

    Ambient noise tomography (ANT) images the entire crust but does not depend on the spatial and temporal distribution of events. Our ANT high-resolution 3D velocity model of southern California uses 849 broadband stations, vastly more than previous studies, and four years of data, 1997-1998, 2007, and 2011, chosen to include our own broadband Salton Seismic Imaging Project, a 40-station transect across the Salton Trough, as well as other campaign stations in both Mexico and the U.S.A., and permanent stations. Our shear-wave model has 0.05° x 0.05° lateral and 1 km vertical blocks. We used the Harvard Community Velocity Model (CVM-H) as the initial model for the inversion. We show significant differences relative to the CVM-H model, especially in the lower crust and upper mantle. We observe prominent low-velocity anomalies in the upper mantle under the Salton Buttes and Cerro Prieto geothermal fields, indicating high-temperatures and possibly partial-melt. Similar low-velocity zones have been previously observed along the Gulf of California. We also observe vertical to gradually dipping lateral velocity contrasts in the lower crust under the southern part of the San Andreas Fault. The east to northeast dip may represent crustal fabric sheared by movement of the Pacific plate under the North American plate prior to the initiation of transform motion.

  9. Paleoearthquakes at Frazier Mountain, California delimit extent and frequency of past San Andreas Fault ruptures along 1857 trace

    Science.gov (United States)

    Scharer, Katherine M.; Weldon, Ray; Streig, Ashley; Fumal, Thomas

    2014-01-01

    Large earthquakes are infrequent along a single fault, and therefore historic, well-characterized earthquakes exert a strong influence on fault behavior models. This is true of the 1857 Fort Tejon earthquake (estimated M7.7–7.9) on the southern San Andreas Fault (SSAF), but an outstanding question is whether the 330 km long rupture was typical. New paleoseismic data for six to seven ground-rupturing earthquakes on the Big Bend of the SSAF restrict the pattern of possible ruptures on the 1857 stretch of the fault. In conjunction with existing sites, we show that over the last ~650 years, at least 75% of the surface ruptures are shorter than the 1857 earthquake, with estimated rupture lengths of 100 to <300 km. These results suggest that the 1857 rupture was unusual, perhaps leading to the long open interval, and that a return to pre-1857 behavior would increase the rate of M7.3–M7.7 earthquakes.

  10. Hydrothermal frictional strengths of rock and mineral samples relevant to the creeping section of the San Andreas Fault

    Science.gov (United States)

    Moore, Diane E.; Lockner, David A.; Hickman, Stephen H.

    2016-01-01

    We compare frictional strengths in the temperature range 25–250 °C of fault gouge from SAFOD (CDZ and SDZ) with quartzofeldspathic wall rocks typical of the central creeping section of the San Andreas Fault (Great Valley sequence and Franciscan Complex). The Great Valley and Franciscan samples have coefficients of friction, μ > 0.35 at all experimental conditions. Strength is unchanged between 25° and 150 °C, but μ increases at higher temperatures, exceeding 0.50 at 250 °C. Both samples are velocity strengthening at room temperature but show velocity-weakening behavior beginning at 150 °C and stick-slip motion at 250 °C. These rocks, therefore, have the potential for unstable seismic slip at depth. The CDZ gouge, with a high saponite content, is weak (μ = 0.09–0.17) and velocity strengthening in all experiments, and μ decreases at temperatures above 150 °C. Behavior of the SDZ is intermediate between the CDZ and wall rocks: μ < 0.2 and does not vary with temperature. Although saponite is probably not stable at depths greater than ∼3 km, substitution of the frictionally similar minerals talc and Mg-rich chlorite for saponite at higher temperatures could potentially extend the range of low strength and stable slip down to the base of the seismogenic zone.

  11. Scientific drilling into the San Andreas fault and site characterization research: Planning and coordination efforts. Final technical report

    Energy Technology Data Exchange (ETDEWEB)

    Zoback, M.D.

    1998-08-30

    The fundamental scientific issue addressed in this proposal, obtaining an improved understanding of the physical and chemical processes responsible for earthquakes along major fault zones, is clearly of global scientific interest. By sampling the San Andreas fault zone and making direct measurements of fault zone properties to 4.0 km at Parkfield they will be studying an active plate-boundary fault at a depth where aseismic creep and small earthquakes occur and where a number of the scientific questions associated with deeper fault zone drilling can begin to be addressed. Also, the technological challenges associated with drilling, coring, downhole measurements and borehole instrumentation that may eventually have to be faced in deeper drilling can first be addressed at moderate depth and temperature in the Parkfield hole. Throughout the planning process leading to the development of this proposal they have invited participation by scientists from around the world. As a result, the workshops and meetings they have held for this project have involved about 350 scientists and engineers from about a dozen countries.

  12. Andriejaus Volano rykštės ir pentinai: erezijos tramdymas | Andreas Volanus’ switches and spurs: taming a heresy

    Directory of Open Access Journals (Sweden)

    Gintarė Petuchovaitė

    2013-12-01

    Full Text Available The author stresses that the royal secretary Andreas Volanus (about 1531–1610, ideologist of the Evangelical Reformed in the Grand Duchy of Lithuania, had polemics not only with Catholics, but also with Antitrinitarians. His literary polemic with Antitrinitarians lasted for about a half of the 16th century. This article argues that Volanus considered radical Reformation movement as heretical. Therefore, the article attempts to summarize the concept of heresy (non-compliance with early Church teaching, novelty of opinions, fallibility of fabrication, a variety of ideas, hypocrisy, distortion of the sola scriptura principle. The article asserts that Volanus tried to repress radical, destructive ideas by switches and spurs – by a strict and orthodox Swiss doctrine (Confessio helvetica posterior, 1566. In this article, text of Volanus – dedication to Ioanni Schemeto, a nobleman of Samogitia, from the last work of polemic Epistolae aliquot ad refellendum doctrinae Samosatinianae errorem, ad astruendam Orthodoxam de Divina Trinitate sententiam, hoc tempore lectu non inutiles (1592 – is presented and commented. This text reveals Volanus’ position and his attitudes to heresy.

  13. Aseismic slip and fault-normal strain along the central creeping section of the San Andreas fault

    Science.gov (United States)

    Rolandone, F.; Burgmann, R.; Agnew, D.C.; Johanson, I.A.; Templeton, D.C.; d'Alessio, M. A.; Titus, S.J.; DeMets, C.; Tikoff, B.

    2008-01-01

    We use GPS data to measure the aseismic slip along the central San Andreas fault (CSAF) and the deformation across adjacent faults. Comparison of EDM and GPS data sets implies that, except for small-scale transients, the fault motion has been steady over the last 40 years. We add 42 new GPS, velocities along the CSAF to constrain the regional strain distribution. Shear strain rates are less than 0.083 ?? 0.010 ??strain/yr adjacent to the creeping SAF, with 1-4.5 mm/yr of contraction across the Coast Ranges. Dislocation modeling of the data gives a deep, long-term slip rate of 31-35 mm/yr and a shallow (0-12 km) creep rate of 28 mm/yr along the central portion of the CSAF, consistent with surface creep measurements. The lower shallow slip rate may be due to the effect of partial locking along the CSAF or reflect reduced creep rates late in the earthquake cycle of the adjoining SAF rupture zones. Copyright 2008 by the American Geophysical Union.

  14. The ShakeOut scenario: A hypothetical Mw7.8 earthquake on the Southern San Andreas Fault

    Science.gov (United States)

    Porter, K.; Jones, L.; Cox, D.; Goltz, J.; Hudnut, K.; Mileti, D.; Perry, S.; Ponti, D.; Reichle, M.; Rose, A.Z.; Scawthorn, C.R.; Seligson, H.A.; Shoaf, K.I.; Treiman, J.; Wein, A.

    2011-01-01

    In 2008, an earthquake-planning scenario document was released by the U.S. Geological Survey (USGS) and California Geological Survey that hypothesizes the occurrence and effects of a Mw7.8 earthquake on the southern San Andreas Fault. It was created by more than 300 scientists and engineers. Fault offsets reach 13 m and up to 8 m at lifeline crossings. Physics-based modeling was used to generate maps of shaking intensity, with peak ground velocities of 3 m/sec near the fault and exceeding 0.5 m/sec over 10,000 km2. A custom HAZUS??MH analysis and 18 special studies were performed to characterize the effects of the earthquake on the built environment. The scenario posits 1,800 deaths and 53,000 injuries requiring emergency room care. Approximately 1,600 fires are ignited, resulting in the destruction of 200 million square feet of the building stock, the equivalent of 133,000 single-family homes. Fire contributes $87 billion in property and business interruption loss, out of the total $191 billion in economic loss, with most of the rest coming from shakerelated building and content damage ($46 billion) and business interruption loss from water outages ($24 billion). Emergency response activities are depicted in detail, in an innovative grid showing activities versus time, a new format introduced in this study. ?? 2011, Earthquake Engineering Research Institute.

  15. Fragmented Landscapes in the San Gorgonio Pass Region: Insights into Quaternary Strain History of the Southern San Andreas Fault System

    Science.gov (United States)

    Kendrick, K. J.; Matti, J. C.; Landis, G. P.; Alvarez, R. M.

    2006-12-01

    The San Gorgonio Pass (SGP) region is a zone of structural complexity within the southern San Andreas Fault system that is characterized by (1) multiple strands of the San Andreas Fault (SAF), (2) intense and diverse microseismicity, (3) contraction within the SGP fault zone (SGPfz), and (4) complex and diverse landforms - all a consequence of structural complications in the vicinity of the southeastern San Bernardino Mountains (SBM). Multiple strands of the SAF zone in the SGP region partition the landscape into discrete geomorphic/geologic domains, including: San Gorgonio Mountain (SGM), Yucaipa Ridge (YR), Kitching Peak (KP), Pisgah Peak (PP), and Coachella Valley (CV) domains. The morphology of each domain reflects the tectonic history unique to that region. Development of the SGP knot in the Mission Creek strand of the SAF (SAFmi) led to westward deflection of the SAFmi, juxtaposition of the KP, PP, and SGM domains, initiation of uplift of YR domain along thrust faults in headwaters of San Gorgonio River, and development of the San Jacinto Fault. Slip on the SAF diminished as a result, thereby allowing integrated drainage systems to develop in the greater SGP region. San Gorgonio River, Whitewater River, and Mission Creek are discrete drainages that transport sediment across the SGM, YR, PP, KP, and CV domains into alluvial systems peripheral to the SGP region. There, depositional units (San Timoteo Formation, upper member, deformed gravels of Whitewater River) all contain clasts of SBM-type and San Gabriel Mountain-type basement, thus constraining slip on the SAF in the SGP region. Middle and late Pleistocene slip on the Mill Creek strand of the SAF (SAFm) in the SGP region has attempted to bypass the SGP knot, and has disrupted landscapes established during SAFmi quiescence. Restoration of right-slip on the SAFm is key to deciphering landscape history. Matti and others (1985, 1992) proposed that a bi-lobed alluvial deposit in the Raywood Flats area has been

  16. Three-Dimensional Investigation of a 5 m Deflected Swale along the San Andreas Fault in the Carrizo Plain

    KAUST Repository

    Akciz, S. O.

    2014-10-21

    Topographic maps produced from Light Detection and Ranging (LiDAR) data are useful for paleoseismic and neotectonic research because they provide submeter representation of faulting-related surface features. Offset measurements of geomorphic features, made in the field or on a remotely sensed imagery, commonly assume a straight or smooth (i.e., undeflected) pre-earthquake geometry. Here, we present results from investigation of an ∼20 cm deep and >5 m wide swale with a sharp bend along the San Andreas fault (SAF) at the Bidart fan site in the Carrizo Plain, California. From analysis of LiDAR topography images and field measurements, the swale was initially interpreted as a channel tectonically offset ∼4:7 m. Our observations from exposures in four backhoe excavations and 25 hand-dug trenchettes show that even though a sharp bend in the swale coincides with the trace of the A.D. 1857 fault rupture, the swale formed after the 1857 earthquake and was not tectonically offset. Subtle fractures observed within a surficial gravel unit overlying the 1857 rupture trace are similar to fractures previously documented at the Phelan fan and LY4 paleoseismic sites 3 and 35 km northwest of Bidart fan, respectively. Collectively, the fractures suggest that a post-1857 moderate-magnitude earthquake caused ground cracking in the Carrizo and Cholame stretches of the SAF. Our observations emphasize the importance of excavation at key locations to validate remote and ground-based measurements, and we advocate more geomorphic characterization for each site if excavation is not possible.

  17. Holocene geologic slip rate for the Mission Creek strand of the Southern San Andreas Fault, northern Coachella Valley, CA.

    Science.gov (United States)

    Munoz, J. J.; Behr, W. M.; Sharp, W. D.; Fryer, R.; Gold, P. O.

    2016-12-01

    Slip on the southern San Andreas fault in the northwestern Coachella Valley in Southern California is partitioned between three strands, the Mission Creek, Garnet Hill, and Banning strands. In the vicinity of the Indio Hills, the NW striking Mission Creek strand extends from the Indio Hills into the San Bernardino Mountains, whereas the Banning and Garnet Hill strands strike WNW and transfer slip into the San Gorgonio Pass region. Together, these three faults accommodate 20 mm/yr of right-lateral motion. Determining which strand accommodates the majority of fault slip and how slip rates on these strands have varied during the Quaternary is critical to seismic hazard assessment for the southern California region. Here we present a new Holocene geologic slip rate from an alluvial fan offset along the Mission Creek strand at the Three Palms site in the Indio Hills. Field mapping and remote sensing using the B4 LiDAR data indicates that the Three Palms fan is offset 57 +/- 3 meters. U-series dating on pedogenic carbonate rinds collected at 25-100 cm depth within the fan deposit constrain the minimum depositional age to 3.49 +/- 0.92 ka, yielding a maximum slip rate of 16 +6.1/-3.8 mm/yr. This Holocene maximum slip rate overlaps within errors with a previously published late Pleistocene slip rate of 12-22 mm/yr measured at Biskra Palms, a few kilometers to the south. Cosmogenic 10Be surface exposure samples were also collected from the fan surface to bracket the maximum depositional age. These samples have been processed and are currently awaiting AMS measurement.

  18. A reevaluation of the Pallett Creek earthquake chronology based on new AMS radiocarbon dates, San Andreas fault, California

    Science.gov (United States)

    Scharer, K.M.; Biasi, G.P.; Weldon, R.J.

    2011-01-01

    The Pallett Creek paleoseismic record occupies a keystone position in most attempts to develop rupture histories for the southern San Andreas fault. Previous estimates of earthquake ages at Pallett Creek were determined by decay counting radiocarbon methods. That method requires large samples which can lead to unaccounted sources of uncertainty in radiocarbon ages because of the heterogeneous composition of organic layers. In contrast, accelerator mass spectrometry (AMS) radiocarbon dates may be obtained from small samples that have known carbon sources and also allow for a more complete sampling of the section. We present 65 new AMS radiocarbon dates that span nine ground-rupturing earthquakes at Pallett Creek. Overall, the AMS dates are similar to and reveal no dramatic bias in the conventional dates. For many layers, however, individual charcoal samples were younger than the conventional dates, leading to earthquake ages that are overall slightly younger than previously reported. New earthquake ages are determined by Bayesian refinement of the layer ages based on stratigraphic ordering and sedimentological constraints. The new chronology is more regular than previously published records in large part due to new samples constraining the age of event R. The closed interval from event C to 1857 has a mean recurrence of 135years (?? = 83.2 years) and a quasiperiodic coefficient of variation (COV) of 0.61. We show that the new dates and resultant earthquake chronology have a stronger effect on COV than the specific membership of this long series and dating precision improvements from sedimentation rates. Copyright 2011 by the American Geophysical Union.

  19. Geomorphological expression of a complex structural region: San Andreas Fault through the San Gorgonio Pass, southern California

    Science.gov (United States)

    Kendrick, K. J.; Matti, J. C.

    2015-12-01

    The San Gorgonio Pass (SGP) region of southern California is a locus of extensive Quaternary deformation surrounding a complex section of the San Andreas Fault (SAF) zone. The geomorphology of the SGP region reflects the complicated history of geologic events in the formation of this structural 'knot'. Critical questions remain in assessing earthquake hazard for this region: What is the likelihood that rupture will propagate through the SGP? If rupture is able to propagate, what pathway will connect the various fault strands? To address these questions, we focus on the geology and geomorphology of the SGP region. We have identified fault-bounded blocks, and focus on three that are developed within crystalline bedrock: the Yucaipa Ridge block (YRB) block, the Kitching Peak block (KPB), and the Pisgah Peak block (PPB). The latter two blocks are positioned south of the YRB, and partially separated from each other by the San Bernardino strand; this strand cannot be mapped at the surface as an active connection between fault strands. Both KPB and PPB are bounded to the south by the San Gorgonio Pass Fault Zone. Morphometric analyses consistently demonstrate distinctions between KPB and PPB, though the bedrock lithologies are the same. Geologic mapping of the region highlights the differences in Quaternary units within the blocks. These geomorphic and geologic distinctions lead to our interpretation that KPB and PPB have experienced markedly different uplift histories that constrain the history of dextral slip on the SAF through SGP. Specifically, although the latest Quaternary geologic setting of SGP raises questions about modern slip transfer through the Pass, the contrasting uplift histories of KPB and PPB strongly suggest that earlier in Quaternary time SGP was not a barrier to slip transfer between the Coachella Valley to the SE and the San Bernardino Basin to the NW.

  20. Fault zone structure and kinematics from lidar, radar, and imagery: revealing new details along the creeping San Andreas Fault

    Science.gov (United States)

    DeLong, S.; Donnellan, A.; Pickering, A.

    2017-12-01

    Aseismic fault creep, coseismic fault displacement, distributed deformation, and the relative contribution of each have important bearing on infrastructure resilience, risk reduction, and the study of earthquake physics. Furthermore, the impact of interseismic fault creep in rupture propagation scenarios, and its impact and consequently on fault segmentation and maximum earthquake magnitudes, is poorly resolved in current rupture forecast models. The creeping section of the San Andreas Fault (SAF) in Central California is an outstanding area for establishing methodology for future scientific response to damaging earthquakes and for characterizing the fine details of crustal deformation. Here, we describe how data from airborne and terrestrial laser scanning, airborne interferometric radar (UAVSAR), and optical data from satellites and UAVs can be used to characterize rates and map patterns of deformation within fault zones of varying complexity and geomorphic expression. We are evaluating laser point cloud processing, photogrammetric structure from motion, radar interferometry, sub-pixel correlation, and other techniques to characterize the relative ability of each to measure crustal deformation in two and three dimensions through time. We are collecting new and synthesizing existing data from the zone of highest interseismic creep rates along the SAF where a transition from a single main fault trace to a 1-km wide extensional stepover occurs. In the stepover region, creep measurements from alignment arrays 100 meters long across the main fault trace reveal lower rates than those in adjacent, geomorphically simpler parts of the fault. This indicates that deformation is distributed across the en echelon subsidiary faults, by creep and/or stick-slip behavior. Our objectives are to better understand how deformation is partitioned across a fault damage zone, how it is accommodated in the shallow subsurface, and to better characterize the relative amounts of fault creep

  1. Elemental Geochemistry of Samples From Fault Segments of the San Andreas Fault Observatory at Depth (SAFOD) Drill Hole

    Science.gov (United States)

    Tourscher, S. N.; Schleicher, A. M.; van der Pluijm, B. A.; Warr, L. N.

    2006-12-01

    Elemental geochemistry of mudrock samples from phase 2 drilling of the San Andreas Fault Observatory at Depth (SAFOD) is presented from bore hole depths of 3066 m to 3169 m and from 3292 m to 3368 m, which contain a creeping section and main trace of the fault, respectively. In addition to preparation and analysis of whole rock sample, fault grains with neomineralized, polished surfaces were hand picked from well-washed whole rock samples, minimizing the potential contamination from drilling mud and steel shavings. The separated fractions were washed in deionized water, powdered using a mortar and pestle, and analyzed using an Inductively Coupled Plasma- Optical Emission Spectrometer for major and minor elements. Based on oxide data results, systematic differences in element concentrations are observed between the whole rock and fault rock. Two groupings of data points are distinguishable in the regions containing the main trace of the fault, a shallow part (3292- 3316 m) and a deeper section (3320-3368 m). Applying the isocon method, assuming Zr and Ti to be immobile elements in these samples, indicates a volume loss of more than 30 percent in the shallow part and about 23 percent in the deep part of the main trace. These changes are minimum estimates of fault-related volume loss, because the whole rock from drilling samples contains variable amount of fault rock as well. Minimum estimates for volume loss in the creeping section of the fault are more than 50 percent when using the isocon method, comparing whole rock to plucked fault rock. The majority of the volume loss in the fault rocks is due to the dissolution and loss of silica, potassium, aluminum, sodium and calcium, whereas (based on oxide data) the mineralized surfaces of fractures appear to be enriched in Fe and Mg. The large amount of element mobility within these fault traces suggests extensive circulation of hydrous fluids along fractures that was responsible for progressive dissolution and leaching

  2. Velocity Gradient Across the San Andreas Fault and Changes in Slip Behavior as Outlined by Full non Linear Tomography

    Science.gov (United States)

    Chiarabba, C.; Giacomuzzi, G.; Piana Agostinetti, N.

    2017-12-01

    The San Andreas Fault (SAF) near Parkfield is the best known fault section which exhibit a clear transition in slip behavior from stable to unstable. Intensive monitoring and decades of studies permit to identify details of these processes with a good definition of fault structure and subsurface models. Tomographic models computed so far revealed the existence of large velocity contrasts, yielding physical insight on fault rheology. In this study, we applied a recently developed full non-linear tomography method to compute Vp and Vs models which focus on the section of the fault that exhibit fault slip transition. The new tomographic code allows not to impose a vertical seismic discontinuity at the fault position, as routinely done in linearized codes. Any lateral velocity contrast found is directly dictated by the data themselves and not imposed by subjective choices. The use of the same dataset of previous tomographic studies allows a proper comparison of results. We use a total of 861 earthquakes, 72 blasts and 82 shots and the overall arrival time dataset consists of 43948 P- and 29158 S-wave arrival times, accurately selected to take care of seismic anisotropy. Computed Vp and Vp/Vs models, which by-pass the main problems related to linarized LET algorithms, excellently match independent available constraints and show crustal heterogeneities with a high resolution. The high resolution obtained in the fault surroundings permits to infer lateral changes of Vp and Vp/Vs across the fault (velocity gradient). We observe that stable and unstable sliding sections of the SAF have different velocity gradients, small and negligible in the stable slip segment, but larger than 15 % in the unstable slip segment. Our results suggest that Vp and Vp/Vs gradients across the fault control fault rheology and the attitude of fault slip behavior.

  3. Slip on the San Andreas fault at Parkfield, California, over two earthquake cycles, and the implications for seismic hazard

    Science.gov (United States)

    Murray, J.; Langbein, J.

    2006-01-01

    Parkfield, California, which experienced M 6.0 earthquakes in 1934, 1966, and 2004, is one of the few locales for which geodetic observations span multiple earthquake cycles. We undertake a comprehensive study of deformation over the most recent earthquake cycle and explore the results in the context of geodetic data collected prior to the 1966 event. Through joint inversion of the variety of Parkfield geodetic measurements (trilateration, two-color laser, and Global Positioning System), including previously unpublished two-color data, we estimate the spatial distribution of slip and slip rate along the San Andreas using a fault geometry based on precisely relocated seismicity. Although the three most recent Parkfield earthquakes appear complementary in their along-strike distributions of slip, they do not produce uniform strain release along strike over multiple seismic cycles. Since the 1934 earthquake, more than 1 m of slip deficit has accumulated on portions of the fault that slipped in the 1966 and 2004 earthquakes, and an average of 2 m of slip deficit exists on the 33 km of the fault southeast of Gold Hill to be released in a future, perhaps larger, earthquake. It appears that the fault is capable of partially releasing stored strain in moderate earthquakes, maintaining a disequilibrium through multiple earthquake cycles. This complicates the application of simple earthquake recurrence models that assume only the strain accumulated since the most recent event is relevant to the size or timing of an upcoming earthquake. Our findings further emphasize that accumulated slip deficit is not sufficient for earthquake nucleation.

  4. Between Historicism and Presentism: Love and Service in Antony ...

    African Journals Online (AJOL)

    For at least five years Shakespeare studies have found themselves in the doldrums. The excitement offered by the initial (and belated) injection of theory some twenty years ago has waned, as Renaissance studies in general, and scholarship devoted to Shakespeare in particular, settled into a “new” historicism that has ...

  5. Long Return Periods for Earthquakes in San Gorgonio Pass and Implications for Large Ruptures of the San Andreas Fault in Southern California

    Science.gov (United States)

    Yule, J.; McBurnett, P.; Ramzan, S.

    2011-12-01

    The largest discontinuity in the surface trace of the San Andreas fault occurs in southern California at San Gorgonio Pass. Here, San Andreas motion moves through a 20 km-wide compressive stepover on the dextral-oblique-slip thrust system known as the San Gorgonio Pass fault zone. This thrust-dominated system is thought to rupture during very large San Andreas events that also involve strike-slip fault segments north and south of the Pass region. A wealth of paleoseismic data document that the San Andreas fault segments on either side of the Pass, in the San Bernardino/Mojave Desert and Coachella Valley regions, rupture on average every ~100 yrs and ~200 yrs, respectively. In contrast, we report here a notably longer return period for ruptures of the San Gorgonio Pass fault zone. For example, features exposed in trenches at the Cabezon site reveal that the most recent earthquake occurred 600-700 yrs ago (this and other ages reported here are constrained by C-14 calibrated ages from charcoal). The rupture at Cabezon broke a 10 m-wide zone of east-west striking thrusts and produced a >2 m-high scarp. Slip during this event is estimated to be >4.5 m. Evidence for a penultimate event was not uncovered but presumably lies beneath ~1000 yr-old strata at the base of the trenches. In Millard Canyon, 5 km to the west of Cabezon, the San Gorgonio Pass fault zone splits into two splays. The northern splay is expressed by 2.5 ± 0.7 m and 5.0 ± 0.7 m scarps in alluvial terraces constrained to be ~1300 and ~2500 yrs old, respectively. The scarp on the younger, low terrace postdates terrace abandonment ~1300 yrs ago and probably correlates with the 600-700 yr-old event at Cabezon, though we cannot rule out that a different event produced the northern Millard scarp. Trenches excavated in the low terrace reveal growth folding and secondary faulting and clear evidence for a penultimate event ~1350-1450 yrs ago, during alluvial deposition prior to the abandonment of the low terrace

  6. Northern San Andreas Fault slip rates on the Santa Cruz Mountain section: 10Be dating of an offset alluvial fan complex, Sanborn County Park, Saratoga, CA

    Science.gov (United States)

    Guns, K. A.; Prentice, C. S.; DeLong, S. B.; Kiefer, K.; Blisniuk, K.; Burgmann, R.

    2015-12-01

    To better assess seismic hazard and fault behavior along the southern peninsula in the San Francisco Bay Area on the Santa Cruz Mountain section of the San Andreas Fault, we combine field observations and high-resolution lidar topography data with 10Be exposure dating on offset landforms to estimate geologic fault slip rates. Our mapping at Sanborn County Park near Saratoga reveals a progression of alluvial fans and debris flows offset from their upstream sources by dextral slip on the San Andreas Fault. These upstream sources are 3 drainages, Todd Creek, Service Road Creek and Aubry Creek. Coarse alluvial deposits from each of these creeks contain large Tertiary sandstone boulders of varying size and abundance, derived from the Vaqueros Formation, that allow us to constrain the provenance of offset alluvial deposits to their upstream sources. Initial reconstruction, based on clast-count data on lithology and size from Todd Creek (n=68), Service Road Creek (N=32) and the offset deposits (n=68), suggest ≥140 m of dextral fault movement. Initial 10Be cosmogenic dating of sandstone boulders on an offset deposit from Service Road Creek yields a maximum date of 8 ka, a date uncorrected for hillslope residence and fluvial transport of inherited 10Be concentrations. These data suggest a minimum slip rate of at least 17 mm/yr on the Santa Cruz Mountain section of the San Andreas Fault in the peninsula. Ongoing analysis will refine this fault slip rate. Our preliminary data underscore the potential of this site to provide geologic slip rate estimates, and therefore answer a question critical to seismic hazard assessment, in a region where steep terrain, mass wasting, vegetation and urban development have generally made slip rate estimates challenging to obtain.

  7. Chemical and Physical Characteristics of Pulverized Granitic Rock Adjacent to the San Andreas, Garlock and San Jacinto Faults: Implications for Earthquake Physics

    Science.gov (United States)

    Rockwell, T. K.; Sisk, M.; Stillings, M.; Girty, G.; Dor, O.; Wechsler, N.; Ben-Zion, Y.

    2008-12-01

    We present new detailed analyses of pulverized granitic rocks from sections adjacent to the San Andreas, Garlock and San Jacinto faults in southern California. Along the San Andreas and Garlock faults, the Tejon Lookout Granite is pulverized in all exposures within about 100 m of both faults. Along the Clark strand of the San Jacinto fault in Horse Canyon, the pulverization of granitic rocks is highly asymmetric, with a much broader zone of pulverization along the southwest side of the Clark fault. In areas where the granite is injected as dyke rock into schist, only the granitic rock shows pulverization, demonstrating the control of rock type on the pulverization process. Chemical analyses indicate little or no weathering in the bulk of the rock, although XRD analysis shows the presence of smectite, illite, and minor kaolinite in the clay-sized fraction. Weathering products may dominate in the less than 1 micron fraction. The average grain size in all samples of pulverized granitic rock range between about 20 and 200 microns (silt to fine sand), with the size distribution in part a function of proximity to the primary slip zone. The San Andreas fault samples are generally finer than those collected from along the Garlock or San Jacinto faults. The particle size distribution for all samples is non-fractal, with a distinct slope break in the 60-100 micron range, which suggests that pulverization is not a consequence of direct shear. This average particle size is quite coarser than previous reports, which we attribute to possible measurement errors in the prior work. Our data and observations suggest that dynamic fracturing in the wall rock of these three major faults only accounts for 1% or less of the earthquake energy budget.

  8. Southern San Andreas Fault evaluation field activity: approaches to measuring small geomorphic offsets--challenges and recommendations for active fault studies

    Science.gov (United States)

    Scharer, Katherine M.; Salisbury, J. Barrett; Arrowsmith, J. Ramon; Rockwell, Thomas K.

    2014-01-01

    In southern California, where fast slip rates and sparse vegetation contribute to crisp expression of faults and microtopography, field and high‐resolution topographic data (fault, analyze the offset values for concentrations or trends along strike, and infer that the common magnitudes reflect successive surface‐rupturing earthquakes along that fault section. Wallace (1968) introduced the use of such offsets, and the challenges in interpreting their “unique complex history” with offsets on the Carrizo section of the San Andreas fault; these were more fully mapped by Sieh (1978) and followed by similar field studies along other faults (e.g., Lindvall et al., 1989; McGill and Sieh, 1991). Results from such compilations spurred the development of classic fault behavior models, notably the characteristic earthquake and slip‐patch models, and thus constitute an important component of the long‐standing contrast between magnitude–frequency models (Schwartz and Coppersmith, 1984; Sieh, 1996; Hecker et al., 2013). The proliferation of offset datasets has led earthquake geologists to examine the methods and approaches for measuring these offsets, uncertainties associated with measurement of such features, and quality ranking schemes (Arrowsmith and Rockwell, 2012; Salisbury, Arrowsmith, et al., 2012; Gold et al., 2013; Madden et al., 2013). In light of this, the Southern San Andreas Fault Evaluation (SoSAFE) project at the Southern California Earthquake Center (SCEC) organized a combined field activity and workshop (the “Fieldshop”) to measure offsets, compare techniques, and explore differences in interpretation. A thorough analysis of the measurements from the field activity will be provided separately; this paper discusses the complications presented by such offset measurements using two channels from the San Andreas fault as illustrative cases. We conclude with best approaches for future data collection efforts based on input from the Fieldshop.

  9. Aproximación histórica a la disección en la cátedra de anatomía de andrea vesalio

    OpenAIRE

    Bula Calderón, Andrés Fernando

    2012-01-01

    Se analiza brevemente la obra de Andrea Vesalio “De Humani Corporis Fabrica”, se comenta el periodo postvesaliano señalando las diferencias entre la primera y segunda ediciones ilustradas. Se hace alusión a Fernando VII al construir o reparar la estructura física del teatro Anatómico de Madrid; era en este teatro en donde las grandes figuras de la anatomía enseñaban la “Fabrica”. Por un feliz hallazgo se comenta un libro raro en nuestro medio, titulado “Anatomía Completa del Hombre” cuyo auto...

  10. Por um lugar no império: inglesidade, pertencimento negro e memória nacional em dois contos de Andrea Levy

    OpenAIRE

    Silva, Denise Almeida

    2017-01-01

    Resumo: Este trabalho objetiva examinar a interrogação da inglesidade (Englishness) pela ficcionista britânica negra Andrea Levy a partir do lugar ocupado por ela como cidadã britânica, descendente de imigrantes caribenhos negros. O questionamento é situado no quadro da construção identitária que segue ao contato dos ingleses com seus outros, especialmente no contexto da geração Windrush. Entrevistas e, sobretudo, o ensaio “Back to my own country” ajudam a dimensionar a influência da prática ...

  11. In search of a place in the empire: englishness, black belonging and national memory in two short stories by Andrea Levy

    OpenAIRE

    Silva, Denise Almeida

    2017-01-01

    http://dx.doi.org/10.5007/2175-8026.2017v70n1p17This essay aims at investigating the interrogation of Englishness carried out by the black English writer Andrea Levy from within the place she occupies as an English citizen who descends from black Caribbean immigrants. This interrogation takes place in the context of the identity construction that follows the encounter between the English and their others, especially in the Windrush generation. Interviews and the essay “Back to my own country”...

  12. Por um lugar no império: inglesidade, pertencimento negro e memória nacional em dois contos de Andrea Levy

    OpenAIRE

    Denise Almeida Silva

    2017-01-01

    http://dx.doi.org/10.5007/2175-8026.2017v70n1p17 Este trabalho objetiva examinar a interrogação da inglesidade (Englishness) pela  ficcionista britânica negra Andrea Levy a partir do lugar ocupado por ela como cidadã britânica, descendente de migrantes caribenhos negros.  O questionamento é situado no quadro da construção identitária que segue ao contato dos ingleses com seus outros, especialmente no contexto da geração Windrush. Entrevistas e, sobretudo, o ensaio “Back to my own country”...

  13. Implications for San Andreas Fault Ruptures Based on New Evidence from the Cabazon, CA Paleoseismic Site, San Gorgonio Pass Fault Zone

    Science.gov (United States)

    Scharer, K. M.; Yule, D.; Humbert, L. R.; Witkowsky, R.

    2013-12-01

    The 10-km section of the San Gorgonio Pass fault zone (SGPFZ) between the Banning and San Bernardino strands of the San Andreas fault is composed of roughly orthogonal, alternating strike slip and thrust fault sections. In order to investigate whether the complexity of the fault system is a barrier to thoroughgoing ruptures and consequently a limit on earthquake magnitude, we excavated a mega-trench across a compressional section of the SGPFZ approximately 2 km northeast of Cabazon, CA. The mega-trench was located at the base of the San Bernardino Mountains and exposed Pleistocene Cabazon Formation in the hanging wall block, thrust over Holocene alluvial units. Sediments in the 9-m-deep trench consisted of boulder to cobble debris flow deposits and silty sand fluvial sequences, which buried and were interbedded with incipient soil horizons. We present evidence for five earthquakes in the mega-trench, determined by several generations of fault scarps buried by progressively younger sediments. Vertical separation for each event was small, on the order of 30 to 60 cm at the paleo-ground surfaces. Preliminary radiocarbon dating of charcoal collected from the deformed sediments constrains the five observed events to the past ~6000 years and the most recent event to ca. 500-700 years ago; additional dates are pending that will enable us to determine the age of each earthquake. Based on the existing age control, the average earthquake recurrence interval for the SGPFZ is ~1400 years, seven times longer than the average interval for neighboring sections on the southern San Andreas fault. If the earthquakes recorded at the Cabazon site record great San Andreas fault ruptures like those modeled in the 2008 ShakeOut Scenario, much of the vertical slip must occur within the bedrock in the hanging wall or in blind faults in the alluvium below the site. Alternatively, these earthquakes may represent more local, M6-M7 events that rupture the San Gorgonio Pass and possibly

  14. Manuel Vázquez Montalbán, Andrea Camilleri y Paco Ignacio Taibo II : Una lectura de la filiación

    OpenAIRE

    García Saraví, Mercedes; Repetto, Carolina

    2008-01-01

    Una de las facetas de Manuel Vázquez Montalbán es la de ser reconocido como iniciador de prácticas discursivas que se manifiestan renovadas en escritores de otras latitudes. Tal es el caso de Paco Ignacio Taibo II y Andrea Camilleri quienes han declarado explícitamente sus aprovechamientos literarios de algunos rasgos de la obra del español. La cuestión de la filiación resulta clave para pensar estas relaciones. La filiación pasa por lo menos por dos meridianos identificables. El primero es l...

  15. Changes in state of stress on the southern san andreas fault resulting from the california earthquake sequence of april to june 1992.

    Science.gov (United States)

    Jaumé, S C; Sykes, L R

    1992-11-20

    The April to June 1992 Landers earthquake sequence in southern California modified the state of stress along nearby segments of the San Andreas fault, causing a 50-kilometer segment of the fault to move significantly closer to failure where it passes through a compressional bend near San Gorgonio Pass. The decrease in compressive normal stress may also have reduced fluid pressures along that fault segment. As pressures are reequilibrated by diffusion, that fault segment should move closer to failure with time. That fault segment and another to the southeast probably have not ruptured in a great earthquake in about 300 years.

  16. GPS-derived strain in northwestern California: Termination of the San Andreas fault system and convergence of the Sierra Nevada Great Valley block contribute to southern Cascadia forearc contraction

    Science.gov (United States)

    Williams, Todd B.; Kelsey, Harvey M.; Freymueller, Jeffrey T.

    2006-02-01

    GPS-derived velocities (1993-2002) in northwestern California show that processes other than subduction are in part accountable for observed upper-plate contraction north of the Mendocino triple junction (MTJ) region. After removing the component of elastic strain accumulation due to the Cascadia subduction zone from the station velocities, two additional processes account for accumulated strain in northern California. The first is the westward convergence of the Sierra Nevada-Great Valley (SNGV) block toward the coast and the second is the north-northwest impingement of the San Andreas fault system from the south on the northern California coastal region in the vicinity of Humboldt Bay. Sierra Nevada-Great Valley block motion is northwest toward the coast, convergent with the more northerly, north-northwest San Andreas transform fault-parallel motion. In addition to the westward-converging Sierra Nevada-Great Valley block, San Andreas transform-parallel shortening also occurs in the Humboldt Bay region. Approximately 22 mm/yr of distributed Pacific-SNGV motion is observed inland of Cape Mendocino across the northern projections of the Maacama and Bartlett Springs fault zones but station velocities decrease rapidly north of Cape Mendocino. The resultant 6-10 mm/yr of San Andreas fault-parallel shortening occurs above the southern edge of the subducted Gorda plate and at the latitude of Humboldt Bay. Part of the San Andreas fault-parallel shortening may be due to the viscous coupling of the southern edge of the Gorda plate to overlying North American plate. We conclude that significant portions of the upper-plate contraction observed north of the MTJ region are not solely a result of subduction of the Gorda plate but also a consequence of impingement of the western edge of the Sierra Nevada-Great Valley block and growth of the northernmost segments of the San Andreas fault system.

  17. A Quantitative Assessment of DInSAR Measurements of Interseismic Deformation: The Southern San Andreas Fault Case Study

    Science.gov (United States)

    Manzo, Mariarosaria; Fialko, Yuri; Casu, Francesco; Pepe, Antonio; Lanari, Riccardo

    2012-08-01

    We investigate the capabilities and limitations of the Differential Interferometric Synthetic Aperture Radar (DInSAR) techniques, in particular of the Small BAseline Subset (SBAS) approach, to measure surface deformation in active seismogenetic areas. The DInSAR analysis of low-amplitude, long-wavelength deformation, such as that due to interseismic strain accumulation, is limited by intrinsic trade-offs between deformation signals and orbital uncertainties of SAR platforms in their contributions to the interferometric phases, the latter being typically well approximated by phase ramps. Such trade-offs can be substantially reduced by employing auxiliary measurements of the long-wavelength velocity field. We use continuous Global Positioning System (GPS) measurements from a properly distributed set of stations to perform a pre-filtering operation of the available DInSAR interferograms. In particular, the GPS measurements are used to estimate the secular velocity signal, approximated by a spatial ramp within the azimuth-range radar imaging plane; the phase ramps derived from the GPS data are then subtracted from the available set of DInSAR interferograms. This pre-filtering step allows us to compensate for the major component of the long-wavelength range change that, within the SBAS procedure, might be wrongly interpreted and filtered out as orbital phase ramps. With this correction, the final results are obtained by simply adding the pre-filtered long-wavelength deformation signal to the SBAS retrieved time series. The proposed approach has been applied to a set of ERS-1/2 SAR data acquired during the 1992-2006 time interval over a 200 × 200 km area around the Coachella Valley section of the San Andreas Fault in Southern California, USA. We present results of the comparison between the SBAS and the Line Of Sight (LOS)—projected GPS time series of the USGC/PBO network, as well as the mean LOS velocity fields derived using SBAS, GPS and stacking techniques. Our

  18. Southern San Andreas Fault Slip History Refined Using Pliocene Colorado River Deposits in the Western Salton Trough

    Science.gov (United States)

    Dorsey, R. J.; Bennett, S. E. K.; Housen, B. A.

    2016-12-01

    Tectonic reconstructions of Pacific-North America plate motion in the Salton Trough region (Bennett et al., 2016) are constrained by: (1) late Miocene volcanic rocks that record 255 +/-10 km of transform offset across the northern Gulf of California since 6 Ma (average 42 mm/yr; Oskin and Stock, 2003); and (2) GPS data that show modern rates of 50-52 mm/yr between Pacific and North America plates, and 46-48 mm/yr between Baja California (BC) and North America (NAM) (Plattner et al., 2007). New data from Pliocene Colorado River deposits in the Salton Trough provide an important additional constraint on the geologic history of slip on the southern San Andreas Fault (SAF). The Arroyo Diablo Formation (ADF) in the San Felipe Hills SW of the Salton Sea contains abundant cross-bedded channel sandstones deformed in the dextral Clark fault zone. The ADF ranges in age from 4.3 to 2.8 Ma in the Fish Creek-Vallecito basin, and in the Borrego Badlands its upper contact with the Borrego Formation is 2.9 Ma based on our new magnetostratigraphy. ADF paleocurrent data from a 20-km wide, NW-oriented belt near Salton City record overall transport to the SW (corrected for bedding dip, N=165), with directions ranging from NW to SE. Spatial domain analysis reveals radial divergence of paleoflow to the: W and NW in the NW domain; SW in the central domain; and S in the SE domain. Data near Borrego Sink, which restores to south of Salton City after removing offset on the San Jacinto fault zone, show overall transport to the SE. Pliocene patterns of radial paleoflow divergence strongly resemble downstream bifurcation of fluvial distributary channels on the modern Colorado River delta SW of Yuma, and indicate that Salton City has translated 120-130 km NW along the SAF since 3 Ma. We propose a model in which post-6 Ma BC-NAM relative motion gradually accelerated to 50 mm/yr by 4 Ma, continued at 50 mm/yr from 4-1 Ma, and decreased to 46 mm/yr from 1-0 Ma (split equally between the SAF and

  19. 100 Years of Accumulated Deformation at Depth Observed in the Elizabeth Lake Tunnel, Southern San Andreas Fault

    Science.gov (United States)

    Telling, J. W.; Tayyebi, A.; Hudnut, K. W.; Davis, C. A.; Glennie, C. L.

    2017-12-01

    The Elizabeth Lake Tunnel was completed in 1911 to convey water from the Owens Valley to Los Angeles, CA. The tunnel is approximately 8-km long and crosses the San Andreas Fault (SAF) at a depth of 90 m below the surface, measured near the tunnel mid-point. If present, a tectonic signal recorded by warping or offset of this tunnel could provide an opportunity to examine the deformation at depth in this location during the 100 years since the tunnel was constructed. A temporary closure of the tunnel for inspection and repair allowed the entire 8-km length to be surveyed using terrestrial laser scanning, providing a complete high-resolution 3D model of the tunnel. Since a high-resolution survey of the tunnel after its construction is not available for comparison, we assume that the tunnel was originally straight; this assumption is substantiated by records that indicate that the two halves of the tunnel, dug from opposite ends, met within 2.9 cm in the XY-plane and 1.6 cm in the Z-direction, at an off-fault location. Our results show 20 cm of right-lateral horizontal deformation near the estimated location of the tunnel's intersection with SAF, which agrees with the SAF sense of motion. The zone of deviation is approximately 300 m south of the SAF surface trace, and is about 350 m south of where the two tunneling crews met. This observed offset is consistent with either steady-state creep of about 2 mm/yr or possibly residual afterslip following the 1857 earthquake (that may be negligible at present). The full tectonic strain accumulation at this location would be five to ten times higher than observed, so clearly the observed deformation is only part of the expected full tectonic signal. In addition to the 20 cm short-wavelength deflection, we are examining for possible subtle longer wavelength deformation of the tunnel. The lidar model also shows significantly higher density of apparent cracking in the tunnel walls near this intercept point.

  20. Creep avalanches on San Andreas Fault and their underlying mechanism from 19 years of InSAR and seismicity

    Science.gov (United States)

    Khoshmanesh, M.; Shirzaei, M.

    2017-12-01

    Recent seismic and geodetic observations indicate that interseismic creep rate varies in both time and space. The spatial extent of creep determines the earthquake potential, while its temporal evolution, known as slow slip events (SSE), may trigger earthquakes. Although the conditions promoting fault creep are well-established, the mechanism for initiating self-sustaining and sometimes cyclic creep events is enigmatic. Here we investigate a time series of 19 years of surface deformation measured by radar interferometry between 1992 and 2011 along the Central San Andreas Fault (CSAF) to constrain the temporal evolution of creep. We show that the creep rate along the CSAF has a sporadic behavior, quantified with a Gumbel-like probability distribution characterized by longer tail toward the extreme positive rates, which is signature of burst-like creep dynamics. Defining creep avalanches as clusters of isolated creep with rates exceeding the shearing rate of tectonic plates, we investigate the statistical properties of their size and length. We show that, similar to the frequency-magnitude distribution of seismic events, the distribution of potency estimated for creep avalanches along the CSAF follows a power law, dictated by the distribution of their along-strike lengths. We further show that an ensemble of concurrent creep avalanches which aseismically rupture isolated fault compartments form the semi-periodic SSEs observed along the CSAF. Using a rate and state friction model, we show that normal stress is temporally variable on the fault, and support this using seismic observations. We propose that, through a self-sustaining fault-valve behavior, compaction induced elevation of pore pressure within hydraulically isolated fault compartments, and subsequent frictional dilation is the cause for the observed episodic SSEs. We further suggest that the 2004 Parkfield Mw6 earthquake may have been triggered by the SSE on adjacent creeping segment, which increased Coulomb

  1. Stratigraphic record of Pliocene-Pleistocene basin evolution and deformation within the Southern San Andreas Fault Zone, Mecca Hills, California

    Science.gov (United States)

    McNabb, James C.; Dorsey, Rebecca J.; Housen, Bernard A.; Dimitroff, Cassidy W.; Messé, Graham T.

    2017-11-01

    A thick section of Pliocene-Pleistocene nonmarine sedimentary rocks exposed in the Mecca Hills, California, provides a record of fault-zone evolution along the Coachella Valley segment of the San Andreas fault (SAF). Geologic mapping, measured sections, detailed sedimentology, and paleomagnetic data document a 3-5 Myr history of deformation and sedimentation in this area. SW-side down offset on the Painted Canyon fault (PCF) starting 3.7 Ma resulted in deposition of the Mecca Conglomerate southwest of the fault. The lower member of the Palm Spring Formation accumulated across the PCF from 3.0 to 2.6 Ma during regional subsidence. SW-side up slip on the PCF and related transpressive deformation from 2.6 to 2.3 Ma created a time-transgressive angular unconformity between the lower and upper members of the Palm Spring Formation. The upper member accumulated in discrete fault-bounded depocenters until initiation of modern deformation, uplift, and basin inversion starting at 0.7 Ma. Some spatially restricted deposits can be attributed to the evolution of fault-zone geometric complexities. However, the deformation events at ca. 2.6 Ma and 0.7 Ma are recorded regionally along 80 km of the SAF through Coachella Valley, covering an area much larger than mapped fault-zone irregularities, and thus require regional explanations. We therefore conclude that late Cenozoic deformation and sedimentation along the SAF in Coachella Valley has been controlled by a combination of regional tectonic drivers and local deformation due to dextral slip through fault-zone complexities. We further propose a kinematic link between the 2.6-2.3 Ma angular unconformity and a previously documented but poorly dated reorganization of plate-boundary faults in the northern Gulf of California at 3.3-2.0 Ma. This analysis highlights the potential for high-precision chronologies in deformed terrestrial deposits to provide improved understanding of local- to regional-scale structural controls on basin

  2. Andrea Palladio e la Villa Veneta. Da Petrarca a Carlo Scarpa”, un viaggio alla scoperta della civiltà della villa. (I

    Directory of Open Access Journals (Sweden)

    Giulia Tettamanzi

    2015-11-01

    Full Text Available The exposition “Andrea Palladio e la Villa Veneta. Da Petrarca a Carlo Scarpa” (Andrea Palladio and the villa veneta. From Petrarca to Carlo Scarpa offers a trip through the history of the villa, in places of time, space and culture. The exposition crosses the seven centuries of the villa civilisation, suggests an itinerary of the most celebrated villas in Veneto, and has the start point in the latin culture. In this contest, we’ll explore, in latin authors original texts and in art-works showed, the typolocigical, ideological, literary archetypes of the villa, discovering the landscape relationship, read in the ancient Rome. Palladio is the concrete and conceptual centre of the exposition, and in his work, we’ll find the same ideological elements of the villa, grow up in latin culture. This text, divided in two parts, proposes, in this first piece, the born, the consolidation, the growth of the myth of an idea, that from the ancient Rom till today, doesn’t cease amazing end evolving. 

  3. Photomosaics and event evidence from the Frazier Mountain paleoseismic site, trench 1, cuts 5–24, San Andreas Fault Zone, southern California (2010–2012)

    Science.gov (United States)

    Scharer, Katherine M.; Fumal, Tom E.; Weldon, Ray J.; Streig, Ashley R.

    2015-08-24

    The Frazier Mountain paleoseismic site is located within the northern Big Bend of the southern San Andreas Fault (lat 34.8122° N., lon 118.9034° W.), in a small structural basin formed by the fault (fig. 1). The site has been the focus of over a decade of paleoseismic study due to high stratigraphic resolution and abundant dateable material. Trench 1 (T1) was initially excavated as a 50-m long, fault-perpendicular trench crossing the northern half of the basin (Lindvall and others, 2002; Scharer and others, 2014a). Owing to the importance of a high-resolution trench site at this location on a 200-km length of the fault with no other long paleoseismic records, later work progressively lengthened and deepened T1 in a series of excavations, or cuts, that enlarged the original excavation. Scharer and others (2014a) provide the photomosaics and event evidence for the first four cuts, which largely show the upper section of the site, represented by alluvial deposits that date from about A.D. 1500 to present. Scharer and others (2014b) discuss the earthquake evidence and dating at the site within the context of prehistoric rupture lengths and magnitudes on the southern San Andreas Fault. Here we present the photomosaics and event evidence for a series of cuts from the lower section, covering sediments that were deposited from about A.D. 500 to 1500 (fig. 2).

  4. A 15 year catalog of more than 1 million low-frequency earthquakes: Tracking tremor and slip along the deep San Andreas Fault

    Science.gov (United States)

    Shelly, David R.

    2017-05-01

    Low-frequency earthquakes (LFEs) are small, rapidly recurring slip events that occur on the deep extensions of some major faults. Their collective activation is often observed as a semicontinuous signal known as tectonic (or nonvolcanic) tremor. This manuscript presents a catalog of more than 1 million LFEs detected along the central San Andreas Fault from 2001 to 2016. These events have been detected via a multichannel matched-filter search, cross-correlating waveform templates representing 88 different LFE families with continuous seismic data. Together, these source locations span nearly 150 km along the central San Andreas Fault, ranging in depth from 16 to 30 km. This accumulating catalog has been the source for numerous studies examining the behavior of these LFE sources and the inferred slip behavior of the deep fault. The relatively high temporal and spatial resolutions of the catalog have provided new insights into properties such as tremor migration, recurrence, and triggering by static and dynamic stress perturbations. Collectively, these characteristics are inferred to reflect a very weak fault likely under near-lithostatic fluid pressure, yet the physical processes controlling the stuttering rupture observed as tremor and LFE signals remain poorly understood. This paper aims to document the LFE catalog assembly process and associated caveats, while also updating earlier observations and inferred physical constraints. The catalog itself accompanies this manuscript as part of the electronic supplement, with the goal of providing a useful resource for continued future investigations.

  5. Shallow deformation of the San Andreas fault 5 years following the 2004 Parkfield earthquake (Mw6) combining ERS2 and Envisat InSAR.

    Science.gov (United States)

    Bacques, Guillaume; de Michele, Marcello; Raucoules, Daniel; Aochi, Hideo; Rolandone, Frédérique

    2018-04-16

    This study focuses on the shallow deformation that occurred during the 5 years following the Parkfield earthquake (28/09/2004, Mw 6, San Andreas Fault, California). We use Synthetic Aperture Radar interferometry (InSAR) to provide precise measurements of transient deformations after the Parkfield earthquake between 2005 and 2010. We propose a method to combine both ERS2 and ENVISAT interferograms to increase the temporal data sampling. Firstly, we combine 5 years of available Synthetic Aperture Radar (SAR) acquisitions including both ERS-2 and Envisat. Secondly, we stack selected interferograms (both from ERS2 and Envisat) for measuring the temporal evolution of the ground velocities at given time intervals. Thanks to its high spatial resolution, InSAR could provide new insights on the surface fault motion behavior over the 5 years following the Parkfield earthquake. As a complement to previous studies in this area, our results suggest that shallow transient deformations affected the Creeping-Parkfield-Cholame sections of the San Andreas Fault after the 2004 Mw6 Parkfield earthquake.

  6. Photomosaics and event evidence from the Frazier Mountain paleoseismic site, trench 1, cuts 1–4, San Andreas Fault Zone, southern California (2007–2009)

    Science.gov (United States)

    Scharer, Katherine M.; Fumal, Tom E.; Weldon, Ray J.; Streig, Ashley R.

    2014-01-01

    The Frazier Mountain paleoseismic site is located at the northwest end of the Mojave section of the San Andreas Fault, in a small, closed depression at the base of Frazier Mountain near Tejon Pass, California (lat 34.8122° N., long 118.9034° W.). The site was known to contain a good record of earthquakes due to previous excavations by Lindvall and others (2002). This report provides data resulting from four nested excavations, or cuts, along trench 1 (T1) in 2007 and 2009 at the Frazier Mountain site. The four cuts were excavated progressively deeper and wider in an orientation perpendicular to the San Andreas Fault, exposing distal fan and marsh sediments deposited since ca. A.D. 1200. The results of the trenching show that earthquakes that ruptured the site have repeatedly produced a small depression or sag on the surface, which is subsequently infilled with sand and silt deposits. This report provides high-resolution photomosaics and logs for the T1 cuts, a detailed stratigraphic column for the deposits, and a table summarizing all of the evidence for ground rupturing paleoearthquakes logged in the trenches.

  7. Copy & paste / Andreas Trossek

    Index Scriptorium Estoniae

    Trossek, Andreas, 1980-

    2007-01-01

    Rühmituse Tiit Sokk (Marili Sokk, Ulvi Tiit) ruumiinstallatsioon "Alter Egode Agentuur" Tallinna Linnagaleriis 27. I-4. III ja Kristin Kalamehe näitus "Intensiivravi", mis oli 24. I-4. II vaadatav läbi Hobusepea galerii akende ja 5. II ka galeriis. Väljavõtteid pressitekstidest

  8. Fotokoomiks? / Andreas Trossek

    Index Scriptorium Estoniae

    Trossek, Andreas, 1980-

    2008-01-01

    Fotokoomiksitest, selle zhanri tekkimise ajaloost teleseepide kõrvalproduktina ja vähesest tuntusest Eestis - vaid Priit Pärn, Rein Pakk, Rainer Sarnet ja Joonas Sildre on seda kasutanud oma loomingus. Ka arvutiprogrammist Comic Book Creator

  9. Nicola Michelassi y Salomé Vuelta García, Il teatro spagnolo a Firenze nel Seicento. Vol. I: Giacinto Andrea Cicognini, Giovan Battista Ricciardi, Pietro Susini, Mattias Maria Bartolommei

    Directory of Open Access Journals (Sweden)

    Diego Símini

    2015-01-01

    Full Text Available Reseña de Nicola Michelassi y Salomé Vuelta García, Il teatro spagnolo a Firenze nel Seicento. Vol. I: Giacinto Andrea Cicognini, Giovan Battista Ricciardi, Pietro Susini, Mattias Maria Bartolommei, Alinea (Secoli d’Oro, 67; Commedia Aurea Spagnola e Pubblico Italiano, VIII, Florencia, 2013, 257 pp. ISBN: 9788860557865.

  10. Monitoring of crustal movements in the San Andreas fault zone by a satellite-borne ranging system. Ph.D. Thesis

    Science.gov (United States)

    Kumar, M.

    1976-01-01

    The Close Grid Geodynamic Measurement System is conceived as an orbiting ranging device with a ground base grid of reflectors or transponders (spacing 1.0 to 30 km), which are projected to be of low cost (maintenance free and unattended), and which will permit the saturation of a local area to obtain data useful to monitor crustal movements in the San Andreas fault zone. The system includes a station network of 75 stations covering an area between 36 deg N and 38 deg N latitudes, and 237 deg E and 239 deg E longitudes, with roughly half of the stations on either side of the faults. In addition, the simulation of crustal movements through the introduction of changes in the relative positions between grid stations, weather effect for intervisibility between satellite and station and loss of observations thereof, and comparative evaluation of various observational scheme-patterns have been critically studied.

  11. Experimental constraints on the relationship between clay abundance, clay fabric, and frictional behavior for the Central Deforming Zone of the San Andreas Fault

    Science.gov (United States)

    Wojatschke, Jasmaria; Scuderi, Marco M.; Warr, Laurence N.; Carpenter, Brett M.; Saffer, Demian; Marone, Chris

    2016-10-01

    The presence of smectite (saponite) in fault gouge from the Central Deforming Zone of the San Andreas Fault at Parkfield, CA has been linked to low mechanical strength and aseismic slip. However, the precise relationship between clay mineral structure, fabric development, fault strength, and the stability of frictional sliding is not well understood. We address these questions through the integration of laboratory friction tests and FIB-SEM analysis of fault rock recovered from the San Andreas Fault Observatory at Depth (SAFOD) borehole. Intact fault rock was compared with experimentally sheared fault gouge and different proportions of either quartz clasts or SAFOD clasts extracted from the sample. Nano-textural measurements show the development of localized clay particle alignment along shear folia developed within synthetic gouges; such slip planes have multiples of random distribution (MRD) values of 3.0-4.9. The MRD values measured are higher than previous estimates (MRD 1.5) that show lower degrees of shear localization and clay alignment averaged over larger volumes. The intact fault rock exhibits less well-developed nano-clay fabrics than the experimentally sheared materials, and MRD values decrease with smectite content. We show that the abundance, strength, and shape of clasts all influence fabric evolution via strain localization: quartz clasts yield more strongly developed clay fabrics than serpentine-dominated SAFOD clasts. Our results suggest that (1) both clay abundance and the development of nano-scale fabrics play a role in fault zone weakening and (2) aseismic creep is promoted by slip along clay shears with >20 wt % smectite content and MRD values ≥2.7.

  12. Using surface creep rate to infer fraction locked for sections of the San Andreas fault system in northern California from alignment array and GPS data

    Science.gov (United States)

    Lienkaemper, James J.; McFarland, Forrest S.; Simpson, Robert W.; Caskey, S. John

    2014-01-01

    Surface creep rate, observed along five branches of the dextral San Andreas fault system in northern California, varies considerably from one section to the next, indicating that so too may the depth at which the faults are locked. We model locking on 29 fault sections using each section’s mean long‐term creep rate and the consensus values of fault width and geologic slip rate. Surface creep rate observations from 111 short‐range alignment and trilateration arrays and 48 near‐fault, Global Positioning System station pairs are used to estimate depth of creep, assuming an elastic half‐space model and adjusting depth of creep iteratively by trial and error to match the creep observations along fault sections. Fault sections are delineated either by geometric discontinuities between them or by distinctly different creeping behaviors. We remove transient rate changes associated with five large (M≥5.5) regional earthquakes. Estimates of fraction locked, the ratio of moment accumulation rate to loading rate, on each section of the fault system provide a uniform means to inform source parameters relevant to seismic‐hazard assessment. From its mean creep rates, we infer the main branch (the San Andreas fault) ranges from only 20%±10% locked on its central creeping section to 99%–100% on the north coast. From mean accumulation rates, we infer that four urban faults appear to have accumulated enough seismic moment to produce major earthquakes: the northern Calaveras (M 6.8), Hayward (M 6.8), Rodgers Creek (M 7.1), and Green Valley (M 7.1). The latter three faults are nearing or past their mean recurrence interval.

  13. Ground-rupturing earthquakes on the northern Big Bend of the San Andreas Fault, California, 800 A.D. to Present

    Science.gov (United States)

    Scharer, Katherine M.; Weldon, Ray; Biasi, Glenn; Streig, Ashley; Fumal, Thomas E.

    2017-01-01

    Paleoseismic data on the timing of ground-rupturing earthquakes constrain the recurrence behavior of active faults and can provide insight on the rupture history of a fault if earthquakes dated at neighboring sites overlap in age and are considered correlative. This study presents the evidence and ages for 11 earthquakes that occurred along the Big Bend section of the southern San Andreas Fault at the Frazier Mountain paleoseismic site. The most recent earthquake to rupture the site was the Mw7.7–7.9 Fort Tejon earthquake of 1857. We use over 30 trench excavations to document the structural and sedimentological evolution of a small pull-apart basin that has been repeatedly faulted and folded by ground-rupturing earthquakes. A sedimentation rate of 0.4 cm/yr and abundant organic material for radiocarbon dating contribute to a record that is considered complete since 800 A.D. and includes 10 paleoearthquakes. Earthquakes have ruptured this location on average every ~100 years over the last 1200 years, but individual intervals range from ~22 to 186 years. The coefficient of variation of the length of time between earthquakes (0.7) indicates quasiperiodic behavior, similar to other sites along the southern San Andreas Fault. Comparison with the earthquake chronology at neighboring sites along the fault indicates that only one other 1857-size earthquake could have occurred since 1350 A.D., and since 800 A.D., the Big Bend and Mojave sections have ruptured together at most 50% of the time in Mw ≥ 7.3 earthquakes.

  14. Quaternary landscape development, alluvial fan chronology and erosion of the Mecca Hills at the southern end of the San Andreas Fault zone

    Science.gov (United States)

    Gray, Harrison J.; Owen, Lewis A.; Dietsch, Craig; Beck, Richard A.; Caffee, Marc A.; Finkelman, Robert B.; Mahan, Shannon

    2014-01-01

    Quantitative geomorphic analysis combined with cosmogenic nuclide 10Be-based geochronology and denudation rates have been used to further the understanding of the Quaternary landscape development of the Mecca Hills, a zone of transpressional uplift along the southern end of the San Andreas Fault, in southern California. The similar timing of convergent uplifts along the San Andreas Fault with the initiation of the sub-parallel San Jacinto Fault suggest a possible link between the two tectonic events. The ages of alluvial fans and the rates of catchment-wide denudation have been integrated to assess the relative influence of climate and tectonic uplift on the development of catchments within the Mecca Hills. Ages for major geomorphic surfaces based on 10Be surface exposure dating of boulders and 10Be depth profiles define the timing of surface stabilization to 2.6 +5.6/–1.3 ka (Qyf1 surface), 67.2 ± 5.3 ka (Qvof2 surface), and 280 ± 24 ka (Qvof1 surface). Comparison of 10Be measurements from active channel deposits (Qac) and fluvial terraces (Qt) illustrate a complex history of erosion, sediment storage, and sediment transport in this environment. Beryllium-10 catchment-wide denudation rates range from 19.9 ± 3.2 to 149 ± 22.5 m/Ma and demonstrate strong correlations with mean catchment slope and with total active fault length normalized by catchment area. The lack of strong correlation with other geomorphic variables suggests that tectonic uplift and rock weakening have the greatest control. The currently measured topography and denudation rates across the Mecca Hills may be most consistent with a model of radial topographic growth in contrast to a model based on the rapid uplift and advection of crust.

  15. Slip rates and spatially variable creep on faults of the northern San Andreas system inferred through Bayesian inversion of Global Positioning System data

    Science.gov (United States)

    Murray, Jessica R.; Minson, Sarah E.; Svarc, Jerry L.

    2014-01-01

    Fault creep, depending on its rate and spatial extent, is thought to reduce earthquake hazard by releasing tectonic strain aseismically. We use Bayesian inversion and a newly expanded GPS data set to infer the deep slip rates below assigned locking depths on the San Andreas, Maacama, and Bartlett Springs Faults of Northern California and, for the latter two, the spatially variable interseismic creep rate above the locking depth. We estimate deep slip rates of 21.5 ± 0.5, 13.1 ± 0.8, and 7.5 ± 0.7 mm/yr below 16 km, 9 km, and 13 km on the San Andreas, Maacama, and Bartlett Springs Faults, respectively. We infer that on average the Bartlett Springs fault creeps from the Earth's surface to 13 km depth, and below 5 km the creep rate approaches the deep slip rate. This implies that microseismicity may extend below the locking depth; however, we cannot rule out the presence of locked patches in the seismogenic zone that could generate moderate earthquakes. Our estimated Maacama creep rate, while comparable to the inferred deep slip rate at the Earth's surface, decreases with depth, implying a slip deficit exists. The Maacama deep slip rate estimate, 13.1 mm/yr, exceeds long-term geologic slip rate estimates, perhaps due to distributed off-fault strain or the presence of multiple active fault strands. While our creep rate estimates are relatively insensitive to choice of model locking depth, insufficient independent information regarding locking depths is a source of epistemic uncertainty that impacts deep slip rate estimates.

  16. Andreas Fülberth, „Riga. Kleine Geschichte der Stadt”. Ciekawy przewodnik nie tylko po Rydze, ale także po historii Łotwy

    Directory of Open Access Journals (Sweden)

    Tomasz Kamil Otocki

    2014-12-01

    At the beginning of 2014, the book „Riga. Kleine Geschichte der Stadt” (Riga. A short history of the town was issued. The author is Andreas Fülberth, a young historian from Germany, who is a lecturer of the history of Eastern Europe in the University of Kiel. He has already published several works about the Baltic states (in German: “Baltikum”, the most important of them being „Tallinn – Riga – Kaunas. Ihr Ausbau zu modernen Hauptstädten 1920-1940". Köln u. a. 2005 (Das Baltikum in Geschichte und Gegenwart, Bd. 2, which is dedicated to the plans of architectural rebuilding of the Baltic capitals (Kaunas – Riga – Tallinn during the time of the first independence (1918-1940. The history of Riga by Andreas Fülberth begins – very traditionally – with the establishing of the town by Bishop Albert of Riga in 1201. Actually we can learn not only about the history of the town. The book by Andreas Fülberth provides a quite long trip through the history of Livonia (now a part of Latvia. For Polish readers very important and interesting piece of  Riga’s history could be so called “Polish times” (to be more precise: “Polish-Lithuanian” in Livonia – which used to be seen quite critical by Latvian historians before the war. We can learn also about Ignacy Mościcki  who studied in Riga, the treaty of Riga from March 1921,  as well  as the Polish academic fraternities in Livonia (Arcadia and Welecja. Maybe the most important part of the book begins in 1918 – when Latvia gained independence for the first time in her history. We can learn not only about Kārlis Ulmanis and the Soviet-Latvian government of Pēteris Stučka, but also about  the activities of Andrievs Niedra, a pro-German prime minister of Latvia. Andreas Fülberth, as a passionate lover  of  architecture, provides an interesting piece of information about the architectural rebuilding of Riga during the time of Ulmanis – we can learn the history of the Freedom Monument

  17. Review: Petia Genkova & Andrea E. Abele (Eds.) (2008). Lernen und Entwicklung im globalen Kontext. "Heimliche Lehrpläne" und Basiskompetenzen [Learning and Development in a Global Context. Hidden Curriculum and Base Competencies

    OpenAIRE

    Dörte Bernhard

    2011-01-01

    This anthology addresses globalization with regard to the world of work. How can women pursue their career and enjoy equal opportunities in the labor market? How can employees be supported during the process of company acquisition? How can the existential crises of young adults that were triggered through institutional work experiences be met and coped with? How can violence among children and adolescents be prevented? Seventeen contributions in Petia GENKOVA's and Andrea E. ABELE's anthology...

  18. Geomorphic evidence of active tectonics in the San Gorgonio Pass region of the San Andreas Fault system: an example of discovery-based research in undergraduate teaching

    Science.gov (United States)

    Reinen, L. A.; Yule, J. D.

    2014-12-01

    Student-conducted research in courses during the first two undergraduate years can increase learning and improve student self-confidence in scientific study, and is recommended for engaging and retaining students in STEM fields (PCAST, 2012). At Pomona College, incorporating student research throughout the geology curriculum tripled the number of students conducting research prior to their senior year that culminated in a professional conference presentation (Reinen et al., 2006). Here we present an example of discovery-based research in Neotectonics, a second-tier course predominantly enrolling first-and second-year students; describe the steps involved in the four week project; and discuss early outcomes of student confidence, engagement and retention. In the San Gorgonio Pass region (SGPR) in southern California, the San Andreas fault undergoes a transition from predominantly strike-slip to a complex system of faults with significant dip-slip, resulting in diffuse deformation and raising the question of whether a large earthquake on the San Andreas could propagate through the region (Yule, 2009). In spring 2014, seven students in the Neotectonics course conducted original research investigating quantifiable geomorphic evidence of tectonic activity in the SGPR. Students addressed questions of [1] unequal uplift in the San Bernardino Mountains, [2] fault activity indicated by stream knick points, [3] the role of fault style on mountain front sinuosity, and [4] characteristic earthquake slip determined via fault scarp degradation models. Students developed and revised individual projects, collaborated with each other on methods, and presented results in a public forum. A final class day was spent reviewing the projects and planning future research directions. Pre- and post-course surveys show increases in students' self-confidence in the design, implementation, and presentation of original scientific inquiries. 5 of 6 eligible students participated in research the

  19. Looking for Off-Fault Deformation and Measuring Strain Accumulation During the Past 70 years on a Portion of the Locked San Andreas Fault

    Science.gov (United States)

    Vadman, M.; Bemis, S. P.

    2017-12-01

    Even at high tectonic rates, detection of possible off-fault plastic/aseismic deformation and variability in far-field strain accumulation requires high spatial resolution data and likely decades of measurements. Due to the influence that variability in interseismic deformation could have on the timing, size, and location of future earthquakes and the calculation of modern geodetic estimates of strain, we attempt to use historical aerial photographs to constrain deformation through time across a locked fault. Modern photo-based 3D reconstruction techniques facilitate the creation of dense point clouds from historical aerial photograph collections. We use these tools to generate a time series of high-resolution point clouds that span 10-20 km across the Carrizo Plain segment of the San Andreas fault. We chose this location due to the high tectonic rates along the San Andreas fault and lack of vegetation, which may obscure tectonic signals. We use ground control points collected with differential GPS to establish scale and georeference the aerial photograph-derived point clouds. With a locked fault assumption, point clouds can be co-registered (to one another and/or the 1.7 km wide B4 airborne lidar dataset) along the fault trace to calculate relative displacements away from the fault. We use CloudCompare to compute 3D surface displacements, which reflect the interseismic strain accumulation that occurred in the time interval between photo collections. As expected, we do not observe clear surface displacements along the primary fault trace in our comparisons of the B4 lidar data against the aerial photograph-derived point clouds. However, there may be small scale variations within the lidar swath area that represent near-fault plastic deformation. With large-scale historical photographs available for the Carrizo Plain extending back to at least the 1940s, we can potentially sample nearly half the interseismic period since the last major earthquake on this portion of

  20. Characterizing the Relationship Between Lithospheric Deformation and Seismic Anisotropy in the Basin and Range Province and San Andreas Fault System using Ps Receiver Function Analysis

    Science.gov (United States)

    Ford, H. A.; Schnorr, E.

    2017-12-01

    The presence of complex and spatially variable anisotropy in many parts of the western U.S. has been tied to regional tectonic and dynamic processes that go beyond the (frequently) assumed plate motion oriented shear. In the Basin and Range, a well-imaged "swirl" of shear wave splitting observations has been explained via a number of different dynamic processes, including a lithospheric drip and toroidal flow. In central California, rapid variations in splitting direction across the plate boundary have been attributed to a relatively narrow, well-defined shear zone. Ambient noise tomography has further complicated the picture, indicating that some of the observed complexity can be explained by incorporating multiple layers of anisotropy. The goal of this study is to place firm constraints on vertical variations in anisotropy over two tectonically distinct, yet related, regions- the Basin and Range province and the San Andreas fault system, in order to better understand how deformation of the lithosphere is accommodated. To do this, radial and transverse component Ps receiver functions have been calculated for 14 stations within the two regions. Within both study areas, variability exists between most stations at crust and lithospheric mantle depths. This is particularly true for stations located near the San Andreas Fault system. These differences may be attributed to variations in the provenance of the lithospheric "packages" in some areas, however several stations are located near or within the plate boundary system and may be sampling multiple regions with varying deformation fabrics. To account for this, future work will include binning as a function of piercing point. One notable exception to the generally observed variability is along the western margin of the Basin and Range, where several stations show similarities in back azimuthal variations at lower crust and uppermost mantle depths. Preliminary forwarding modeling of two of these stations indicates that

  1. Weak point property and sections of Picard bundles on a ...

    Indian Academy of Sciences (India)

    [1] Alexeev V and Nakamura I, Mumford's construction of degenerating Abelian varieties,. Tohoku Math. J. 51 (1999) 399–420. [2] Altman A, Iarrobino A and Kleiman S, Irreducibility of the compactified Jacobian, Real and complex singularities, in: Proc. 9th Nordic Summer School (1977) (Oslo: Sijthoff and Noordhoff) pp.

  2. Picard Trajectory Approximation Iteration for Efficient Orbit Propagation

    Science.gov (United States)

    2015-07-21

    diameter 0.054 that “ kisses ” the origin. The right-most eigenvalues being attracted to fixed positions on the circular locus explains the asymptotic...indirect (Pontryagin’s Principle ) state, co-state differential equations solveable without a shooting method for a large class of problems. In [9] Bai...It is possible to apply this principle in the case of a general forcing function using partial derivatives, Taylor Series techniques, or any other

  3. Picard groups of the moduli spaces of semistable sheaves I

    Indian Academy of Sciences (India)

    R. Narasimhan (Krishtel eMaging) 1461 1996 Oct 15 13:05:22

    This completes the extension of results of [6] to nodal curves. Let U = U(n,d) denote the moduli space of torsion-free sheaves of rank n and degree d on Y. If Y has only a single ordinary node as singularity, then the variety U(2,d) has a stratification, U = U ∪ U1 ∪ U0, a disjoint union. Points of U1 correspond to torsion-free.

  4. E-Polytopes in Picard Groups of Smooth Rational Surfaces

    Directory of Open Access Journals (Sweden)

    Jae-Hyouk Lee

    2016-04-01

    Full Text Available In this article, we introduce special divisors (root, line, ruling, exceptional system and rational quartic in smooth rational surfaces and study their correspondences to subpolytopes in Gosset polytopes k 21 . We also show that the sets of rulings and exceptional systems correspond equivariantly to the vertices of 2 k 1 and 1 k 2 via E-type Weyl action.

  5. 78 FR 68151 - Quarterly Publication of Individuals, Who Have Chosen To Expatriate, as Required by Section 6039G

    Science.gov (United States)

    2013-11-13

    ...-KETCHEDJIAN JACQUELINE........ ISABELLE MEIER ANDREA NICOLE VETTER MEIREN ROELAND M A VANDER MELO CARL GUSTAF... RIMELL ALISON JANE RIVERA MARCEL RICHARD ROBERTSON SUMMER RODRIGUEZ JOSEPH BRUCE ROGERS ERIC COY ROGERS HUNTER WESLEY ROGERS PAUL BRIAN ROHNER-SALVAJ BRIGITTE ANNE ORIANNE ROODNICK GWENETH MICHELLE ROOT ANTONY...

  6. Por um lugar no império: inglesidade, pertencimento negro e memória nacional em dois contos de Andrea Levy

    Directory of Open Access Journals (Sweden)

    Denise Almeida Silva

    2017-01-01

    Full Text Available http://dx.doi.org/10.5007/2175-8026.2017v70n1p17 Este trabalho objetiva examinar a interrogação da inglesidade (Englishness pela  ficcionista britânica negra Andrea Levy a partir do lugar ocupado por ela como cidadã britânica, descendente de migrantes caribenhos negros.  O questionamento é situado no quadro da construção identitária que segue ao contato dos ingleses com seus outros, especialmente no contexto da geração Windrush. Entrevistas e, sobretudo, o ensaio “Back to my own country” ajudam a dimensionar a influência da prática e pensamento racista tanto nas relações sociais e culturais quanto na invisibilização da escravidão negra na história oficial da Inglaterra. Considera-se a escrita como a forma escolhida por Levy para posicionar-se frente a essa omissão histórica, e  analisam-se, como forma de exemplificar tal práxis ficcional,  dois contos que visibilizam as relações entre os coloniais negros e a população hegemônica inglesa, “The polite way that English people have” e “The empty pram”.

  7. Fault zone structure from topography: signatures of en echelon fault slip at Mustang Ridge on the San Andreas Fault, Monterey County, California

    Science.gov (United States)

    DeLong, Stephen B.; Hilley, George E.; Rymer, Michael J.; Prentice, Carol

    2010-01-01

    We used high-resolution topography to quantify the spatial distribution of scarps, linear valleys, topographic sinks, and oversteepened stream channels formed along an extensional step over on the San Andreas Fault (SAF) at Mustang Ridge, California. This location provides detail of both creeping fault landform development and complex fault zone kinematics. Here, the SAF creeps 10–14 mm/yr slower than at locations ∼20 km along the fault in either direction. This spatial change in creep rate is coincident with a series of en echelon oblique-normal faults that strike obliquely to the SAF and may accommodate the missing deformation. This study presents a suite of analyses that are helpful for proper mapping of faults in locations where high-resolution topographic data are available. Furthermore, our analyses indicate that two large subsidiary faults near the center of the step over zone appear to carry significant distributed deformation based on their large apparent vertical offsets, the presence of associated sag ponds and fluvial knickpoints, and the observation that they are rotating a segment of the main SAF. Several subsidiary faults in the southeastern portion of Mustang Ridge are likely less active; they have few associated sag ponds and have older scarp morphologic ages and subdued channel knickpoints. Several faults in the northwestern part of Mustang Ridge, though relatively small, are likely also actively accommodating active fault slip based on their young morphologic ages and the presence of associated sag ponds.

  8. Fractal properties and simulation of micro-seismicity for seismic hazard analysis: a comparison of North Anatolian and San Andreas Fault Zones

    Directory of Open Access Journals (Sweden)

    Naside Ozer

    2012-02-01

    Full Text Available We analyzed statistical properties of earthquakes in western Anatolia as well as the North Anatolian Fault Zone (NAFZ in terms of spatio-temporal variations of fractal dimensions, p- and b-values. During statistically homogeneous periods characterized by closer fractal dimension values, we propose that occurrence of relatively larger shocks (M >= 5.0 is unlikely. Decreases in seismic activity in such intervals result in spatial b-value distributions that are primarily stable. Fractal dimensions decrease with time in proportion to increasing seismicity. Conversely, no spatiotemporal patterns were observed for p-value changes. In order to evaluate failure probabilities and simulate earthquake occurrence in the western NAFZ, we applied a modified version of the renormalization group method. Assuming an increase in small earthquakes is indicative of larger shocks, we apply the mentioned model to micro-seismic (M<= 3.0 activity, and test our results using San Andreas Fault Zone (SAFZ data. We propose that fractal dimension is a direct indicator of material heterogeneity and strength. Results from a model suggest simulated and observed earthquake occurrences are coherent, and may be used for seismic hazard estimation on creeping strike-slip fault zones.

  9. Along-strike variations in fault frictional properties along the San Andreas Fault near Cholame, California from joint earthquake and low-frequency earthquake relocations

    Science.gov (United States)

    Harrington, Rebecca M.; Cochran, Elizabeth S.; Griffiths, Emily M.; Zeng, Xiangfang; Thurber, Clifford H.

    2016-01-01

    Recent observations of low‐frequency earthquakes (LFEs) and tectonic tremor along the Parkfield–Cholame segment of the San Andreas fault suggest slow‐slip earthquakes occur in a transition zone between the shallow fault, which accommodates slip by a combination of aseismic creep and earthquakes (fault, which accommodates slip by stable sliding (>35  km depth). However, the spatial relationship between shallow earthquakes and LFEs remains unclear. Here, we present precise relocations of 34 earthquakes and 34 LFEs recorded during a temporary deployment of 13 broadband seismic stations from May 2010 to July 2011. We use the temporary array waveform data, along with data from permanent seismic stations and a new high‐resolution 3D velocity model, to illuminate the fine‐scale details of the seismicity distribution near Cholame and the relation to the distribution of LFEs. The depth of the boundary between earthquakes and LFE hypocenters changes along strike and roughly follows the 350°C isotherm, suggesting frictional behavior may be, in part, thermally controlled. We observe no overlap in the depth of earthquakes and LFEs, with an ∼5  km separation between the deepest earthquakes and shallowest LFEs. In addition, clustering in the relocated seismicity near the 2004 Mw 6.0 Parkfield earthquake hypocenter and near the northern boundary of the 1857 Mw 7.8 Fort Tejon rupture may highlight areas of frictional heterogeneities on the fault where earthquakes tend to nucleate.

  10. Delayed dynamic triggering of deep tremor along the Parkfield-Cholame section of the San Andreas Fault following the 2014 M6.0 South Napa earthquake

    Science.gov (United States)

    Peng, Zhigang; Shelly, David R.; Ellsworth, William L.

    2015-01-01

    Large, distant earthquakes are known to trigger deep tectonic tremor along the San Andreas Fault and in subduction zones. However, there are relatively few observations of triggering from regional distance earthquakes. Here we show that a small tremor episode about 12–18 km NW of Parkfield was triggered during and immediately following the passage of surface waves from the 2014 Mw 6.0 South Napa main shock. More notably, a major tremor episode followed, beginning about 12 h later, and centered SE of Parkfield near Cholame. This major episode is one of the largest seen over the past several years, containing intense activity for ~3 days and taking more than 3 weeks to return to background levels. This episode showed systematic along-strike migration at ~5 km/d, suggesting that it was driven by a slow-slip event. Our results suggest that moderate-size earthquakes are capable of triggering major tremor and deep slow slip at regional distances.

  11. Zoogeography of the San Andreas Fault system: Great Pacific Fracture Zones correspond with spatially concordant phylogeographic boundaries in western North America.

    Science.gov (United States)

    Gottscho, Andrew D

    2016-02-01

    The purpose of this article is to provide an ultimate tectonic explanation for several well-studied zoogeographic boundaries along the west coast of North America, specifically, along the boundary of the North American and Pacific plates (the San Andreas Fault system). By reviewing 177 references from the plate tectonics and zoogeography literature, I demonstrate that four Great Pacific Fracture Zones (GPFZs) in the Pacific plate correspond with distributional limits and spatially concordant phylogeographic breaks for a wide variety of marine and terrestrial animals, including invertebrates, fish, amphibians, reptiles, birds, and mammals. These boundaries are: (1) Cape Mendocino and the North Coast Divide, (2) Point Conception and the Transverse Ranges, (3) Punta Eugenia and the Vizcaíno Desert, and (4) Cabo Corrientes and the Sierra Transvolcanica. However, discussion of the GPFZs is mostly absent from the zoogeography and phylogeography literature likely due to a disconnect between biologists and geologists. I argue that the four zoogeographic boundaries reviewed here ultimately originated via the same geological process (triple junction evolution). Finally, I suggest how a comparative phylogeographic approach can be used to test the hypothesis presented here. © 2014 Cambridge Philosophical Society.

  12. Epilithic diatoms in headwater areas of the hydrographical sub-basin of the Andreas Stream, RS, Brazil, and their relation with eutrophication processes

    Directory of Open Access Journals (Sweden)

    Carla Giselda Heinrich

    2014-12-01

    Full Text Available AIM: This research aimed to study the composition of epilithic diatom flora in headwater areas of the sub-basin of the Andreas stream, RS, Brazil, and their relation with eutrophication processes. METHODS: Quarterly excursions (March, June, September, December 2012 and Mach 2013 were performed in ten sampling points selected in the sub-basin, to collect samples for the identification and counting the organisms in the group of diatoms (Class Bacillariophyceae. RESULTS: The results indicated the occurrence of 243 taxa, distributed in 53 genera. Of these, 59 were considered abundant, being distributed in 29 genera. Seven species showed elevated tolerance levels to organic pollution and eutrophication: Adlafia drouetiana (R. M. Patrick Metzeltin & Lange-Bertalot, Amphipleura lindheimeri Grunow; Fallacia monoculata (Hustedt D. G. Mann, Navicula cryptotenella Lange-Bertalot, Navicula symmetrica R. M. Patrick, Nitzschia palea (Kützing W. Smith and Sellaphora auldreekie D. G. Mann & S. M. McDonald in Mann et al. CONCLUSION: Although this research has been conducted in headwater areas, the occurrence of these seven species could be explained by considering the use of these areas for agricultural and livestock purposes, compromising the stability of these aquatic ecosystems, due to the significant contribution of fertilizer and organic matter, a condition that characterizes a process of eutrophication.

  13. Sierran affinity (?) metasedimentary rocks beneath the Coast Range Ophiolite of the Sierra Azul block east of the San Andreas fault, Santa Clara County, CA

    Science.gov (United States)

    McLaughlin, R. J.; Dumitru, T. A.; Ernst, W. G.

    2011-12-01

    The Loma Prieta slate (LPS) is a Ernst, 2008, GSA Special Paper 438). Weighted mean age calculations indicate a youngest zircon age cluster at about 152.5±2 Ma for the LPS, which indicates its maximum depositional age. The large number of zircons in the youngest LPS age cluster (31 out of 87) may reflect a contemporaneous volcanic source, consistent with the petrography. Zircon data for the MFS indicate earliest possible deposition at about 152 ± 1 Ma. Zircon ages >200 Ma are generally similar in the LPS and MFS, with minor age groupings at roughly 950-1450 and 1750-2100 Ma. As with the MFS, the LPS data suggest a major influence from sources in the Sierra Nevada arc, with minimal influences from sources in the Klamath Mountains and Nevada miogeocline. Available detrital zircon data require Cretaceous or younger maximum depositional ages for metaclastic terranes of the Franciscan Complex. The LPS detrital zircon data thus, are in reasonable agreement with the MFS data and permit interpretation of the LPS as displaced northward by the San Andreas and Hayward-Calaveras faults from the southwestern Great Valley margin.

  14. The Evergreen basin and the role of the Silver Creek fault in the San Andreas fault system, San Francisco Bay region, California

    Science.gov (United States)

    Jachens, Robert C.; Wentworth, Carl M.; Graymer, Russell W.; Williams, Robert; Ponce, David A.; Mankinen, Edward A.; Stephenson, William J.; Langenheim, Victoria

    2017-01-01

    The Evergreen basin is a 40-km-long, 8-km-wide Cenozoic sedimentary basin that lies mostly concealed beneath the northeastern margin of the Santa Clara Valley near the south end of San Francisco Bay (California, USA). The basin is bounded on the northeast by the strike-slip Hayward fault and an approximately parallel subsurface fault that is structurally overlain by a set of west-verging reverse-oblique faults which form the present-day southeastward extension of the Hayward fault. It is bounded on the southwest by the Silver Creek fault, a largely dormant or abandoned fault that splays from the active southern Calaveras fault. We propose that the Evergreen basin formed as a strike-slip pull-apart basin in the right step from the Silver Creek fault to the Hayward fault during a time when the Silver Creek fault served as a segment of the main route by which slip was transferred from the central California San Andreas fault to the Hayward and other East Bay faults. The dimensions and shape of the Evergreen basin, together with palinspastic reconstructions of geologic and geophysical features surrounding it, suggest that during its lifetime, the Silver Creek fault transferred a significant portion of the ∼100 km of total offset accommodated by the Hayward fault, and of the 175 km of total San Andreas system offset thought to have been accommodated by the entire East Bay fault system. As shown previously, at ca. 1.5–2.5 Ma the Hayward-Calaveras connection changed from a right-step, releasing regime to a left-step, restraining regime, with the consequent effective abandonment of the Silver Creek fault. This reorganization was, perhaps, preceded by development of the previously proposed basin-bisecting Mount Misery fault, a fault that directly linked the southern end of the Hayward fault with the southern Calaveras fault during extinction of pull-apart activity. Historic seismicity indicates that slip below a depth of 5 km is mostly transferred from the Calaveras

  15. The Elizabeth Lake paleoseismic site: Rupture pattern constraints for the past ~800 years for the Mojave section of the south-central San Andreas Fault

    Science.gov (United States)

    Bemis, Sean; Scharer, Katherine M.; Dolan, James F.; Rhodes, Ed

    2016-01-01

    The southern San Andreas Fault in California has hosted two historic surface-rupturing earthquakes, the ~M7 1812 Wrightwood earthquake and the ~M7.9 1857 Fort Tejon earthquake (e.g., Sieh, 1978; Jacoby et al., 1988). Numerous paleoseismic studies have established chronologies of historic and prehistoric earthquakes at sites along the full length of the 1857 rupture (e.g., Sieh, 1978; Scharer et al., 2014). These studies provide an unparalleled opportunity to examine patterns of recent ruptures; however, at least two significant spatial gaps in high-quality paleoseismic sites remain. At ~100 km long each, these gaps contribute up to 100 km of uncertainty to paleo-rupture lengths and could also permit a surface rupture from an earthquake up to ~M7.2 to go undetected [using scaling relationships of Wells and Coppersmith (1994)]. Given the known occurrence of an ~M7 earthquake on this portion of the SAF (1812), it is critical to fill these gaps in order to better constrain paleo-rupture lengths and to increase the probability of capturing the full spatial record of surface rupturing earthquakes.   In this study, we target a new site within the 100 km long stretch of the San Andreas Fault between the Frazier Mountain and Pallett Creek paleoseismic sites (Figure 1), near Elizabeth Lake, California. Prior excavations at the site during 1998-1999 encountered promising stratigraphy but these studies were hindered by shallow groundwater throughout the site. We began our current phase of investigations in 2012, targeting the northwestern end of a 40 x 350 m fault-parallel depression that defines the site (Figure 2). Subsequent investigations in 2013 and 2014 focused on the southeastern end of the depression where the fault trace is constrained between topographic highs and is proximal to an active drainage. In total, our paleoseismic investigations consist of 10 fault-perpendicular trenches that cross the depression (Figure 2) and expose a >2000 year depositional record

  16. Review of Sex, Drugs and Body Counts: The Politics of Numbers in Global Crime and Conflict, edited by Peter Andreas and Kelly M. Greenhill

    Directory of Open Access Journals (Sweden)

    Aaron G. Montgomery

    2011-01-01

    Full Text Available Andreas, Peter, and Greenhill, Kelly M. (Eds.. Sex, Drugs, and Body Counts: The Politics of Numbers in Global Crime and Conflict, (Ithaca, NY: Cornell University Press, 2010. 287 pp. ISBN 978-0-8014-4861-4 (cloth; ISBN 978-0-8014-7618-1 (pbk.The ten scholarly papers in Sex, Drugs and Body Counts explore the generation and propagation of numbers that drive policy decisions in the U.S. government regarding human trafficking, drug trade, and armed conflict (including the war on terror. Each of these papers, written by different authors, provides an illuminating insight into how some of the numbers we hear or read in the news are derived. While the general message of the papers tends to be depressing, namely that the numbers driving U.S. policy vary from being slightly suspect to clearly fabricated, the book does provide positive examples of how accurate numbers can be obtained and how the numbers that are being used can be interpreted. As a teaching resource, the book provides instructors an opportunity to deepen their understanding of how quantitative data are used in U.S. policy, allowing them to explore these issues in class. Individual papers from the book could be used in a general education course (either in mathematics or in a field related to the topics as a way to introduce students to reading quantitatively dense material. In a course more focused on the topics of the book and with a more quantitatively literate audience, the entire book could probably be assigned as reading.

  17. San Andreas Fault dip, Peninsular Ranges mafic lower crust and partial melt in the Salton Trough, Southern California, from ambient-noise tomography

    Science.gov (United States)

    Barak, Shahar; Klemperer, Simon L.; Lawrence, Jesse F.

    2015-11-01

    We use ambient-noise tomography to improve CVM-H11.9, a community velocity model of southern California. Our new 3-D shear-velocity model with 0.05° x 0.05° lateral and 1 km vertical blocks reveals new structure beneath the San Andreas Fault (SAF), Peninsular Ranges batholith (PRB), southern Sierra Nevada batholith (SNB), and the Salton Trough (ST). We use 4 years of data recorded on 849 broadband stations, vastly more than previous studies and including our own broadband Salton Seismic Imaging Project, a 40 station transect across the ST, as well as other campaign stations in both Mexico and the United States. Mean lower crust and upper mantle wave speeds (3.6 km/s at 20 km, 4.2 km/s at 40 km) are low by global standards. Across the SAF, southeast of San Gorgonio Pass, we observe vertical to steeply dipping lateral velocity contrasts that extend beneath the Moho. Beneath the western PRB and westernmost southern SNB, we observe relatively high shear velocities (≥3.8 km/s) in the lower crust that we interpret as the mafic roots of the overlying arc. Relatively high-velocity upper mantle (up to ˜4.5 km/s) may be part of the intact arc, or possibly a remnant of the Farallon plate. Beneath the ST, we observe zones of low shear-velocity in the lower crust and upper mantle which permit up to ˜4.5% melt in the lower crust and up to ˜6% melt in the upper mantle, depending on the assumed composition and pore geometry. Our results preclude the existence of older continental crust beneath the ST and support the creation of new crust beneath the ST.

  18. 4D stress evolution models of the San Andreas Fault System: Investigating time- and depth-dependent stress thresholds over multiple earthquake cycles

    Science.gov (United States)

    Burkhard, L. M.; Smith-Konter, B. R.

    2017-12-01

    4D simulations of stress evolution provide a rare insight into earthquake cycle crustal stress variations at seismogenic depths where earthquake ruptures nucleate. Paleoseismic estimates of earthquake offset and chronology, spanning multiple earthquakes cycles, are available for many well-studied segments of the San Andreas Fault System (SAFS). Here we construct new 4D earthquake cycle time-series simulations to further study the temporally and spatially varying stress threshold conditions of the SAFS throughout the paleoseismic record. Interseismic strain accumulation, co-seismic stress drop, and postseismic viscoelastic relaxation processes are evaluated as a function of variable slip and locking depths along 42 major fault segments. Paleoseismic earthquake rupture histories provide a slip chronology dating back over 1000 years. Using GAGE Facility GPS and new Sentinel-1A InSAR data, we tune model locking depths and slip rates to compute the 4D stress accumulation within the seismogenic crust. Revised estimates of stress accumulation rate are most significant along the Imperial (2.8 MPa/100yr) and Coachella (1.2 MPa/100yr) faults, with a maximum change in stress rate along some segments of 11-17% in comparison with our previous estimates. Revised estimates of earthquake cycle stress accumulation are most significant along the Imperial (2.25 MPa), Coachella (2.9 MPa), and Carrizo (3.2 MPa) segments, with a 15-29% decrease in stress due to locking depth and slip rate updates, and also postseismic relaxation from the El Mayor-Cucapah earthquake. Because stress drops of major strike-slip earthquakes rarely exceed 10 MPa, these models may provide a lower bound on estimates of stress evolution throughout the historical era, and perhaps an upper bound on the expected recurrence interval of a particular fault segment. Furthermore, time-series stress models reveal temporally varying stress concentrations at 5-10 km depths, due to the interaction of neighboring fault

  19. Imaging Stress Transients and Fault Zone Processes with Crosswell Continuous Active-Source Seismic Monitoring at the San Andreas Fault Observatory at Depth

    Science.gov (United States)

    Niu, F.; Taira, T.; Daley, T. M.; Marchesini, P.; Robertson, M.; Wood, T.

    2017-12-01

    Recent field and laboratory experiments identify seismic velocity changes preceding microearthquakes and rock failure (Niu et al., 2008, Nature; Scuderi et al., 2016, NatureGeo), which indicates that a continuous monitoring of seismic velocity might provide a mean of understanding of the earthquake nucleation process. Crosswell Continuous Active-Source Seismic Monitoring (CASSM) using borehole sources and sensors has proven to be an effective tool for measurements of seismic velocity and its temporal variation at seismogenic depth (Silver, et al, 2007, BSSA; Daley, et al, 2007, Geophysics). To expand current efforts on the CASSM development, in June 2017 we have begun to conduct a year-long CASSM field experiment at the San Andreas Fault Observatory at Depth (SAFOD) in which the preceding field experiment detected the two sudden velocity reductions approximately 10 and 2 hours before microearthquakes (Niu et al., 2008, Nature). We installed a piezoelectric source and a three-component accelerometer at the SAFOD pilot and main holes ( 1 km depth) respectively. A seismic pulse was fired from the piezoelectric source four times per second. Each waveform was recorded 150-ms-long data with a sampling rate of 48 kHz. During this one-year experiment, we expect to have 10-15 microearthquakes (magnitude 1-3) occurring near the SAFOD site, and the data collected from the new experiment would allow us to further explore a relation between velocity changes and the Parkfield seismicity. Additionally, the year-long data provide a unique opportunity to study long-term velocity changes that might be related to seasonal stress variations at Parkfield (Johnson et al., 2017, Science). We will report on initial results of the SAFOD CASSM experiment and operational experiences of the CASSM development.

  20. Using a modified time-reverse imaging technique to locate low-frequency earthquakes on the San Andreas Fault near Cholame, California

    Science.gov (United States)

    Horstmann, Tobias; Harrington, Rebecca M.; Cochran, Elizabeth S.

    2015-01-01

    We present a new method to locate low-frequency earthquakes (LFEs) within tectonic tremor episodes based on time-reverse imaging techniques. The modified time-reverse imaging technique presented here is the first method that locates individual LFEs within tremor episodes within 5 km uncertainty without relying on high-amplitude P-wave arrivals and that produces similar hypocentral locations to methods that locate events by stacking hundreds of LFEs without having to assume event co-location. In contrast to classic time-reverse imaging algorithms, we implement a modification to the method that searches for phase coherence over a short time period rather than identifying the maximum amplitude of a superpositioned wavefield. The method is independent of amplitude and can help constrain event origin time. The method uses individual LFE origin times, but does not rely on a priori information on LFE templates and families.We apply the method to locate 34 individual LFEs within tremor episodes that occur between 2010 and 2011 on the San Andreas Fault, near Cholame, California. Individual LFE location accuracies range from 2.6 to 5 km horizontally and 4.8 km vertically. Other methods that have been able to locate individual LFEs with accuracy of less than 5 km have mainly used large-amplitude events where a P-phase arrival can be identified. The method described here has the potential to locate a larger number of individual low-amplitude events with only the S-phase arrival. Location accuracy is controlled by the velocity model resolution and the wavelength of the dominant energy of the signal. Location results are also dependent on the number of stations used and are negligibly correlated with other factors such as the maximum gap in azimuthal coverage, source–station distance and signal-to-noise ratio.

  1. Subsurface geometry of the San Andreas fault in southern California: Results from the Salton Seismic Imaging Project (SSIP) and strong ground motion expectations

    Science.gov (United States)

    Fuis, Gary S.; Bauer, Klaus; Goldman, Mark R.; Ryberg, Trond; Langenheim, Victoria; Scheirer, Daniel S.; Rymer, Michael J.; Stock, Joann M.; Hole, John A.; Catchings, Rufus D.; Graves, Robert; Aagaard, Brad T.

    2017-01-01

    The San Andreas fault (SAF) is one of the most studied strike‐slip faults in the world; yet its subsurface geometry is still uncertain in most locations. The Salton Seismic Imaging Project (SSIP) was undertaken to image the structure surrounding the SAF and also its subsurface geometry. We present SSIP studies at two locations in the Coachella Valley of the northern Salton trough. On our line 4, a fault‐crossing profile just north of the Salton Sea, sedimentary basin depth reaches 4 km southwest of the SAF. On our line 6, a fault‐crossing profile at the north end of the Coachella Valley, sedimentary basin depth is ∼2–3  km">∼2–3  km and centered on the central, most active trace of the SAF. Subsurface geometry of the SAF and nearby faults along these two lines is determined using a new method of seismic‐reflection imaging, combined with potential‐field studies and earthquakes. Below a 6–9 km depth range, the SAF dips ∼50°–60°">∼50°–60° NE, and above this depth range it dips more steeply. Nearby faults are also imaged in the upper 10 km, many of which dip steeply and project to mapped surface fault traces. These secondary faults may join the SAF at depths below about 10 km to form a flower‐like structure. In Appendix D, we show that rupture on a northeast‐dipping SAF, using a single plane that approximates the two dips seen in our study, produces shaking that differs from shaking calculated for the Great California ShakeOut, for which the southern SAF was modeled as vertical in most places: shorter‐period (TTfault.

  2. New constraints on slip rates and locking depths of the San Andreas Fault System from Sentinel-1A InSAR and GAGE GPS observations

    Science.gov (United States)

    Ward, L. A.; Smith-Konter, B. R.; Higa, J. T.; Xu, X.; Tong, X.; Sandwell, D. T.

    2017-12-01

    After over a decade of operation, the EarthScope (GAGE) Facility has now accumulated a wealth of GPS and InSAR data, that when successfully integrated, make it possible to image the entire San Andreas Fault System (SAFS) with unprecedented spatial coverage and resolution. Resulting surface velocity and deformation time series products provide critical boundary conditions needed for improving our understanding of how faults are loaded across a broad range of temporal and spatial scales. Moreover, our understanding of how earthquake cycle deformation is influenced by fault zone strength and crust/mantle rheology is still developing. To further study these processes, we construct a new 4D earthquake cycle model of the SAFS representing the time-dependent 3D velocity field associated with interseismic strain accumulation, co-seismic slip, and postseismic viscoelastic relaxation. This high-resolution California statewide model, spanning the Cerro Prieto fault to the south to the Maacama fault to the north, is constructed on a 500 m spaced grid and comprises variable slip and locking depths along 42 major fault segments. Secular deep slip is prescribed from the base of the locked zone to the base of the elastic plate while episodic shallow slip is prescribed from the historical earthquake record and geologic recurrence intervals. Locking depths and slip rates for all 42 fault segments are constrained by the newest GAGE Facility geodetic observations; 3169 horizontal GPS velocity measurements, combined with over 53,000 line-of-sight (LOS) InSAR velocity observations from Sentinel-1A, are used in a weighted least-squares inversion. To assess slip rate and locking depth sensitivity of a heterogeneous rheology model, we also implement variations in crustal rigidity throughout the plate boundary, assuming a coarse representation of shear modulus variability ranging from 20-40 GPa throughout the (low rigidity) Salton Trough and Basin and Range and the (high rigidity) Central

  3. Investigating Strain Transfer Along the Southern San Andreas Fault: A Geomorphic and Geodetic Study of Block Rotation in the Eastern Transverse Ranges, Joshua Tree National Park, CA

    Science.gov (United States)

    Guns, K. A.; Bennett, R. A.; Blisniuk, K.

    2017-12-01

    To better evaluate the distribution and transfer of strain and slip along the Southern San Andreas Fault (SSAF) zone in the northern Coachella valley in southern California, we integrate geological and geodetic observations to test whether strain is being transferred away from the SSAF system towards the Eastern California Shear Zone through microblock rotation of the Eastern Transverse Ranges (ETR). The faults of the ETR consist of five east-west trending left lateral strike slip faults that have measured cumulative offsets of up to 20 km and as low as 1 km. Present kinematic and block models present a variety of slip rate estimates, from as low as zero to as high as 7 mm/yr, suggesting a gap in our understanding of what role these faults play in the larger system. To determine whether present-day block rotation along these faults is contributing to strain transfer in the region, we are applying 10Be surface exposure dating methods to observed offset channel and alluvial fan deposits in order to estimate fault slip rates along two faults in the ETR. We present observations of offset geomorphic landforms using field mapping and LiDAR data at three sites along the Blue Cut Fault and one site along the Smoke Tree Wash Fault in Joshua Tree National Park which indicate recent Quaternary fault activity. Initial results of site mapping and clast count analyses reveal at least three stages of offset, including potential Holocene offsets, for one site along the Blue Cut Fault, while preliminary 10Be geochronology is in progress. This geologic slip rate data, combined with our new geodetic surface velocity field derived from updated campaign-based GPS measurements within Joshua Tree National Park will allow us to construct a suite of elastic fault block models to elucidate rates of strain transfer away from the SSAF and how that strain transfer may be affecting the length of the interseismic period along the SSAF.

  4. Two-Phase Exhumation of the Santa Rosa Mountains: Low- and High-Angle Normal Faulting During Initiation and Evolution of the Southern San Andreas Fault System

    Science.gov (United States)

    Mason, Cody C.; Spotila, James A.; Axen, Gary; Dorsey, Rebecca J.; Luther, Amy; Stockli, Daniel F.

    2017-12-01

    Low-angle detachment fault systems are important elements of oblique-divergent plate boundaries, yet the role detachment faulting plays in the development of such boundaries is poorly understood. The West Salton Detachment Fault (WSDF) is a major low-angle normal fault that formed coeval with localization of the Pacific-North America plate boundary in the northern Salton Trough, CA. Apatite U-Th/He thermochronometry (AHe; n = 29 samples) and thermal history modeling of samples from the Santa Rosa Mountains (SRM) reveal that initial exhumation along the WSDF began at circa 8 Ma, exhuming footwall material from depths of >2 to 3 km. An uplifted fossil (Miocene) helium partial retention zone is present in the eastern SRM, while a deeper crustal section has been exhumed along the Pleistocene high-angle Santa Rosa Fault (SFR) to much higher elevations in the southwest SRM. Detachment-related vertical exhumation rates in the SRM were 0.15-0.36 km/Myr, with maximum fault slip rates of 1.2-3.0 km/Myr. Miocene AHe isochrons across the SRM are consistent with northeast crustal tilting of the SRM block and suggest that the post-WSDF vertical exhumation rate along the SRF was 1.3 km/Myr. The timing of extension initiation in the Salton Trough suggests that clockwise rotation of relative plate motions that began at 8 Ma is associated with initiation of the southern San Andreas system. Pleistocene regional tectonic reorganization was contemporaneous with an abrupt transition from low- to high-angle faulting and indicates that local fault geometry may at times exert a fundamental control on rock uplift rates along strike-slip fault systems.

  5. Rupture Propagation through the Big Bend of the San Andreas Fault: A Dynamic Modeling Case Study of the Great Earthquake of 1857

    Science.gov (United States)

    Lozos, J.

    2017-12-01

    The great San Andreas Fault (SAF) earthquake of 9 January 1857, estimated at M7.9, was one of California's largest historic earthquakes. Its 360 km rupture trace follows the Carrizo and Mojave segments of the SAF, including the 30° compressional Big Bend in the fault. If 1857 were a characteristic rupture, the hazard implications for southern California would be dire, especially given the inferred 150 year recurrence interval for this section of the fault. However, recent paleoseismic studies in this region suggest that 1857-type events occur less frequently than single-segment Carrizo or Mojave ruptures, and that the hinge of the Big Bend is a barrier to through-going rupture. Here, I use 3D dynamic rupture modeling to attempt to reproduce the rupture length and surface slip distribution of the 1857 earthquake, to determine which physical conditions allow rupture to negotiate the Big Bend of the SAF. These models incorporate the nonplanar geometry of the SAF, an observation-based heterogeneous regional velocity structure (SCEC CVM), and a regional stress field from seismicity literature. Under regional stress conditions, I am unable to produce model events that both match the observed surface slip on the Carrizo and Mojave segments of the SAF and include rupture through the hinge of the Big Bend. I suggest that accumulated stresses at the bend hinge from multiple smaller Carrizo or Mojave ruptures may be required to allow rupture through the bend — a concept consistent with paleoseismic observations. This study may contribute to understanding the cyclicity of hazard associated with the southern-central SAF.

  6. Tectonic activity as a significant source of crustal tetrafluoromethane emissions to the atmosphere: Observations in groundwaters along the San Andreas Fault

    Science.gov (United States)

    Deeds, Daniel A.; Kulongoski, Justin T.; Mühle, Jens; Weiss, Ray F.

    2015-02-01

    Tetrafluoromethane (CF4) concentrations were measured in 14 groundwater samples from the Cuyama Valley, Mil Potrero and Cuddy Valley aquifers along the Big Bend section of the San Andreas Fault System (SAFS) in California to assess whether tectonic activity in this region is a significant source of crustal CF4 to the atmosphere. Dissolved CF4 concentrations in all groundwater samples but one were elevated with respect to estimated recharge concentrations including entrainment of excess air during recharge (Cre; ∼30 fmol kg-1 H2O), indicating subsurface addition of CF4 to these groundwaters. Groundwaters in the Cuyama Valley contain small CF4 excesses (0.1-9 times Cre), which may be attributed to an in situ release from weathering and a minor addition of deep crustal CF4 introduced to the shallow groundwater through nearby faults. CF4 excesses in groundwaters within 200 m of the SAFS are larger (10-980 times Cre) and indicate the presence of a deep crustal flux of CF4 that is likely associated with the physical alteration of silicate minerals in the shear zone of the SAFS. Extrapolating CF4 flux rates observed in this study to the full extent of the SAFS (1300 km × 20-100 km) suggests that the SAFS potentially emits (0.3- 1) ×10-1 kg CF4 yr-1 to the Earth's surface. For comparison, the chemical weathering of ∼ 7.5 ×104km2 of granitic rock in California is estimated to release (0.019- 3.2) ×10-1 kg CF4 yr-1. Tectonic activity is likely an important, and potentially the dominant, driver of natural emissions of CF4 to the atmosphere. Variations in preindustrial atmospheric CF4 as observed in paleo-archives such as ice cores may therefore represent changes in both continental weathering and tectonic activity, including changes driven by variations in continental ice cover during glacial-interglacial transitions.

  7. Chemical controls on fault behavior: weakening of serpentinite sheared against quartz-bearing rocks and its significance for fault creep in the San Andreas system

    Science.gov (United States)

    Moore, Diane E.; Lockner, David A.

    2013-01-01

    The serpentinized ultramafic rocks found in many plate-tectonic settings commonly are juxtaposed against crustal rocks along faults, and the chemical contrast between the rock types potentially could influence the mechanical behavior of such faults. To investigate this possibility, we conducted triaxial experiments under hydrothermal conditions (200-350°C), shearing serpentinite gouge between forcing blocks of granite or quartzite. In an ultramafic chemical environment, the coefficient of friction, µ, of lizardite and antigorite serpentinite is 0.5-0.6, and µ increases with increasing temperature over the tested range. However, when either lizardite or antigorite serpentinite is sheared against granite or quartzite, strength is reduced to µ ~ 0.3, with the greatest strength reductions at the highest temperatures (temperature weakening) and slowest shearing rates (velocity strengthening). The weakening is attributed to a solution-transfer process that is promoted by the enhanced solubility of serpentine in pore fluids whose chemistry has been modified by interaction with the quartzose wall rocks. The operation of this process will promote aseismic slip (creep) along serpentinite-bearing crustal faults at otherwise seismogenic depths. During short-term experiments serpentine minerals reprecipitate in low-stress areas, whereas in longer experiments new Mg-rich phyllosilicates crystallize in response to metasomatic exchanges across the serpentinite-crustal rock contact. Long-term shear of serpentinite against crustal rocks will cause the metasomatic mineral assemblages, which may include extremely weak minerals such as saponite or talc, to play an increasingly important role in the mechanical behavior of the fault. Our results may explain the distribution of creep on faults in the San Andreas system.

  8. Active Fault Geometry and Crustal Deformation Along the San Andreas Fault System Through San Gorgonio Pass, California: The View in 3D From Seismicity

    Science.gov (United States)

    Nicholson, C.; Hauksson, E.; Plesch, A.

    2012-12-01

    Understanding the 3D geometry and deformation style of the San Andreas fault (SAF) is critical to accurate dynamic rupture and ground motion prediction models. We use 3D alignments of hypocenter and focal mechanism nodal planes within a relocated earthquake catalog (1981-2011) [Hauksson et al., 2012] to develop improved 3D fault models for active strands of the SAF and adjacent secondary structures. Through San Gorgonio Pass (SGP), earthquakes define a mechanically layered crust with predominantly high-angle strike-slip faults in the upper ~10 km, while at greater depth, intersecting sets of strike-slip, oblique slip and low-angle thrust faults define a wedge-shaped volume deformation of the lower crust. In some places, this interface between upper and lower crustal deformation may be an active detachment fault, and may have controlled the down-dip extent of recent fault rupture. Alignments of hypocenters and nodal planes define multiple principal slip surfaces through SGP, including a through-going steeply-dipping predominantly strike-slip Banning fault strand at depth that upward truncates a more moderately dipping (40°-50°) blind, oblique North Palm Springs fault. The North Palm Springs fault may be the active down-dip extension of the San Gorgonio Pass thrust offset at depth by the principal, through-going Banning strand. In the northern Coachella Valley, seismicity indicates that the Garnet Hill and Banning fault strands are most likely sub-parallel and steeply dipping (~70°NE) to depths of 8-10 km, where they intersect and merge with a stack of moderately dipping to low-angle oblique thrust faults. Gravity and water well data confirm that these faults are sub-parallel and near vertical in the upper 2-3 km. Although the dense wedge of deep seismicity below SGP and largely south of the SAF contains multiple secondary fault sets of different orientations, the predominant fault set appears to be a series of en echelon NW-striking oblique strike-slip faults

  9. Tectonic activity as a significant source of crustal tetrafluoromethane emissions to the atmosphere: observations in groundwaters along the San Andreas Fault

    Science.gov (United States)

    Deeds, Daniel A.; Kulongoski, Justin T.; Muhle, Jens; Weiss, Ray F.

    2015-01-01

    Tetrafluoromethane (CF4) concentrations were measured in 14 groundwater samples from the Cuyama Valley, Mil Potrero and Cuddy Valley aquifers along the Big Bend section of the San Andreas Fault System (SAFS) in California to assess whether tectonic activity in this region is a significant source of crustal CF4 to the atmosphere. Dissolved CF4 concentrations in all groundwater samples but one were elevated with respect to estimated recharge concentrations including entrainment of excess air during recharge (CreCre; ∼30 fmol kg−1 H2O), indicating subsurface addition of CF4 to these groundwaters. Groundwaters in the Cuyama Valley contain small CF4 excesses (0.1–9 times CreCre), which may be attributed to an in situ release from weathering and a minor addition of deep crustal CF4 introduced to the shallow groundwater through nearby faults. CF4 excesses in groundwaters within 200 m of the SAFS are larger (10–980 times CreCre) and indicate the presence of a deep crustal flux of CF4 that is likely associated with the physical alteration of silicate minerals in the shear zone of the SAFS. Extrapolating CF4 flux rates observed in this study to the full extent of the SAFS (1300 km × 20–100 km) suggests that the SAFS potentially emits (0.3–1)×10−1 kg(0.3–1)×10−1 kg CF4 yr−1 to the Earth's surface. For comparison, the chemical weathering of ∼7.5×104 km2∼7.5×104 km2 of granitic rock in California is estimated to release (0.019–3.2)×10−1 kg(0.019–3.2)×10−1 kg CF4 yr−1. Tectonic activity is likely an important, and potentially the dominant, driver of natural emissions of CF4 to the atmosphere. Variations in preindustrial atmospheric CF4 as observed in paleo-archives such as ice cores may therefore represent changes in both continental weathering and tectonic activity, including changes driven by variations in continental ice cover during glacial–interglacial transitions.

  10. S-wave triggering of tremor beneath the Parkfield, California, section of the San Andreas fault by the 2011 Tohoku, Japan earthquake: observations and theory

    Science.gov (United States)

    Hill, David P.; Peng, Zhigang; Shelly, David R.; Aiken, Chastity

    2013-01-01

    The dynamic stresses that are associated with the energetic seismic waves generated by the Mw 9.0 Tohoku earthquake off the northeast coast of Japan triggered bursts of tectonic tremor beneath the Parkfield section of the San Andreas fault (SAF) at an epicentral distance of ∼8200  km. The onset of tremor begins midway through the ∼100‐s‐period S‐wave arrival, with a minor burst coinciding with the SHSH arrival, as recorded on the nearby broadband seismic station PKD. A more pronounced burst coincides with the Love arrival, followed by a series of impulsive tremor bursts apparently modulated by the 20‐ to 30‐s‐period Rayleigh wave. The triggered tremor was located at depths between 20 and 30 km beneath the surface trace of the fault, with the burst coincident with the S wave centered beneath the fault 30 km northwest of Parkfield. Most of the subsequent activity, including the tremor coincident with the SHSH arrival, was concentrated beneath a stretch of the fault extending from 10 to 40 km southeast of Parkfield. The seismic waves from the Tohoku epicenter form a horizontal incidence angle of ∼14°, with respect to the local strike of the SAF. Computed peak dynamic Coulomb stresses on the fault at tremor depths are in the 0.7–10 kPa range. The apparent modulation of tremor bursts by the small, strike‐parallel Rayleigh‐wave stresses (∼0.7  kPa) is likely enabled by pore pressure variations driven by the Rayleigh‐wave dilatational stress. These results are consistent with the strike‐parallel dynamic stresses (δτs) associated with the S, SHSH, and surface‐wave phases triggering small increments of dextral slip on the fault with a low friction (μ∼0.2). The vertical dynamic stresses δτd do not trigger tremor with vertical or oblique slip under this simple Coulomb failure model.

  11. Incipient Evolution of the Eastern California Shear Zone through a Transpressional Zone along the San Andreas Fault in the San Bernardino Mountains, California

    Science.gov (United States)

    Cochran, W. J.; Spotila, J. A.

    2017-12-01

    Measuring long-term accumulation of strike-slip displacements and transpressional uplift is difficult where strain is accommodated across wide shear zones, as opposed to a single major fault. The Eastern California Shear Zone (ECSZ) in southern California accommodates dextral shear across several strike-slip faults, and is potentially migrating and cutting through a formerly convergent zone of the San Bernardino Mountains (SBM). The advection of crust along the San Andreas fault to the SE has forced these two tectonic regimes into creating a nexus of interacting strike-slip faults north of San Gorgonio Pass. These elements make this region ideal for studying complex fault interactions, evolving fault geometries, and deformational overprinting within a wide shear zone. Using high-resolution topography and field mapping, this study aims to test whether diffuse, poorly formed strike-slip faults within the uplifted SBM block are nascent elements of the ECSZ. Topographic resolution of ≤ 1m was achieved using both lidar and UAV surveys along two Quaternary strike-slip faults, namely the Lake Peak fault and Lone Valley faults. Although the Lone Valley fault cuts across Quaternary alluvium, the geomorphic expression is obscured, and may be the result of slow slip rates. In contrast, the Lake Peak fault is located high elevations north of San Gorgonio Peak in the SBM, and displaces Quaternary glacial deposits. The deposition of large boulders along the escarpment also obscures the apparent magnitude of slip along the fault. Although determining fault offset is difficult, the Lake Peak fault does display evidence for minor right-lateral displacement, where the magnitude of slip would be consistent with individual faults within the ECSZ (i.e. ≤ 1 mm/yr). Compared to the preservation of displacement along strike-slip faults located within the Mojave Desert, the upland region of the SBM adds complexity for measuring fault offset. The distribution of strain across the entire

  12. Integration of Ground-based Magnetics and Vertical Deformation Measurements for the Characterization of the San Andreas Fault at the Durmid Hill Region, California

    Science.gov (United States)

    Alvarez, K.; Polet, J.

    2017-12-01

    The Durmid Hill region is located near the termination of the San Andreas Fault (SAF) at Bombay Beach. This section of the fault has not experienced any major earthquakes for at least the last three centuries. During a 6 year study, Sylvester et al. (1993) collected vertical deformation measurements at Durmid Hill from monuments they installed along a 2.37 km leveling line normal to the SAF. They concluded that interseismic processes account for most of the growth at Durmid Hill and estimated more than 9 mm of uplift within the leveling line, with uniform tilt at distances greater than 500 m from the fault. Langenheim et al. (2014) created a model based on ground-based magnetic data that they collected in the same area and found a complex magnetic structure with a broad band magnetic anomaly present on the northeast side of SAF and a prominent magnetic high along the main mapped trace of the SAF. A primary objective of our study is to reoccupy the leveling line from Sylvester et al. (1993), across the SAF at Durmid Hill. Additionally, we will utilize subsurface geophysical techniques to enhance our understanding of the fault geometry along the southernmost end of the SAF and its relationship to the aseismic deformation at Durmid Hill. Elevation profiles are measured using Nikon Nivo 5C total stations and magnetic field intensity measurements are made by a GSM-19TGW v7.0 walking magnetometer, with a VLF (Very Low requency) attachment. We will present preliminary results from data sets gathered in March and May of 2017, as well as additional surveys that will be carried out in October and November. The preliminary maps produced from the results of the first magnetic surveys show two significant and distinct magnetic anomalies consistent with earlier studies. Initial monument elevation comparisons could only be made for monuments located at the north-eastern end of the leveling line, at a distance of about 1.5 km behind Bat Cave Buttes. There appear to be sections of

  13. The transtensional offshore portion of the northern San Andreas fault: Fault zone geometry, late Pleistocene to Holocene sediment deposition, shallow deformation patterns, and asymmetric basin growth

    Science.gov (United States)

    Beeson, Jeffrey W.; Johnson, Samuel Y.; Goldfinger, Chris

    2017-01-01

    We mapped an ~120 km offshore portion of the northern San Andreas fault (SAF) between Point Arena and Point Delgada using closely spaced seismic reflection profiles (1605 km), high-resolution multibeam bathymetry (~1600 km2), and marine magnetic data. This new data set documents SAF location and continuity, associated tectonic geomorphology, shallow stratigraphy, and deformation. Variable deformation patterns in the generally narrow (∼1 km wide) fault zone are largely associated with fault trend and with transtensional and transpressional fault bends.We divide this unique transtensional portion of the offshore SAF into six sections along and adjacent to the SAF based on fault trend, deformation styles, seismic stratigraphy, and seafloor bathymetry. In the southern region of the study area, the SAF includes a 10-km-long zone characterized by two active parallel fault strands. Slip transfer and long-term straightening of the fault trace in this zone are likely leading to transfer of a slice of the Pacific plate to the North American plate. The SAF in the northern region of the survey area passes through two sharp fault bends (∼9°, right stepping, and ∼8°, left stepping), resulting in both an asymmetric lazy Z–shape sedimentary basin (Noyo basin) and an uplifted rocky shoal (Tolo Bank). Seismic stratigraphic sequences and unconformities within the Noyo basin correlate with the previous 4 major Quaternary sea-level lowstands and record basin tilting of ∼0.6°/100 k.y. Migration of the basin depocenter indicates a lateral slip rate on the SAF of 10–19 mm/yr for the past 350 k.y.Data collected west of the SAF on the south flank of Cape Mendocino are inconsistent with the presence of an offshore fault strand that connects the SAF with the Mendocino Triple Junction. Instead, we suggest that the SAF previously mapped onshore at Point Delgada continues onshore northward and transitions to the King Range thrust.

  14. Deformed Fluvial Terraces of Little Rock Creek Capture Off-Fault Strain Adjacent to the Mojave Section of the San Andreas Fault

    Science.gov (United States)

    Moulin, A.; Scharer, K. M.; Cowgill, E.

    2017-12-01

    Examining discrepancies between geodetic and geomorphic slip-rates along major strike-slip faults is essential for understanding both fault behavior and seismic hazard. Recent work on major strike-slip faults has highlighted off-fault deformation and its potential impact on fault slip rates. However, the extent of off-fault deformation along the San Andreas Fault (SAF) remains largely uncharacterized. Along the Mojave section of the SAF, Little Rock Creek drains from south to north across the fault and has cut into alluvial terraces abandoned between 15 and 30 ka1. The surfaces offer a rare opportunity to both characterize how right-lateral slip has accumulated along the SAF over hundreds of seismic cycles, and investigate potential off-fault deformation along secondary structures, where strain accumulates at slower rates. Here we use both field observations and DEM analysis of B4 lidar data to map alluvial and tectonic features, including 9 terrace treads that stand up to 80 m above the modern channel. We interpret the abandonment and preservation of the fluvial terraces to result from episodic capture of Little Rock Creek through gaps in a shutter ridge north of the fault, followed by progressive right deflection of the river course during dextral slip along the SAF. Piercing lines defined by fluvial terrace risers suggest that the amount of right slip since riser formation ranges from 400m for the 15-ka-riser to 1200m for the 30-ka-riser. Where they are best-preserved NE of the SAF, terraces are also cut by NE-facing scarps that trend parallel to the SAF in a zone extending up to 2km from the main fault. Exposures indicate these are fault scarps, with both reverse and normal stratigraphic separation. Geomorphic mapping reveals deflections of both channel and terrace risers (up to 20m) along some of those faults suggesting they could have accommodated a component of right-lateral slip. We estimated the maximum total amount of strike-slip motion recorded by the

  15. Geomorphic and geologic evidence for slip along the San Bernardino strand of the San Andreas Fault System through the San Gorgonio Pass structural knot, southern California

    Science.gov (United States)

    Kendrick, K. J.; Matti, J. C.

    2017-12-01

    The San Gorgonio Pass (SGP) region of southern California represents an extraordinarily complex section of the San Andreas Fault (SAF) zone, often referred to as a structural knot. Complexity is expressed both structurally and geomorphically, and arises because multiple strands of the SAF have evolved here in Quaternary time. Our integration of geologic and geomorphic analyses led to recognition of multiple fault-bounded blocks characterized by crystalline rocks that have similar physical properties. Hence, any morphometric differences in hypsometric analysis, slope, slope distribution, texture, and stream-power measurements and discontinuities reflect landscape response to tectonic processes rather than differences in lithology. We propose that the differing morphometry of the two blocks on either side of the San Bernardino strand (SBS) of the SAF, the high-standing Kitching Peak block to the east and the lower, more subdued Pisgah Peak block to the west, strongly suggests that the blocks experienced different uplift histories. This difference in uplift histories, in turn suggests that dextral slip occurred over a long time interval on the SBS—despite long-lived controversy raised by the fact that, at the surface, a throughgoing trace of the SBS is not present at this location. A different tectonic history between the two blocks is consistent with the gravity data which indicate that low-density rocks underthrusting the Kitching Peak block are absent below the Pisgah Peak block (Langenheim et al., 2015). Throughgoing slip on the SBS implied by geomorphic differences between the two blocks is also consistent with displaced geologic and geomorphic features. We find compelling evidence for discrete offsets of between 0.6 and 6 km of dextral slip on the SBS, including offset of fluvial and landslide deposits, and beheaded drainages. Although we lack numerical age control for the offset features, the degree of soil development associated with displaced landforms

  16. Katrin Schütz: Geschlechterentwürfe im literarischen Werk von Lou Andreas-Salomé unter Berücksichtigung ihrer Geschlechtertheorie. Würzburg: Verlag Königshausen & Neumann 2008

    Directory of Open Access Journals (Sweden)

    Romana Weiershausen

    2009-03-01

    Full Text Available Katrin Schütz hat eine Studie zu Geschlechterkonzeptionen in Lou Andreas-Salomés Frühwerk vorgelegt, in der auch die bislang wenig berücksichtigten literarischen Texte der Autorin ausgewertet werden. Die Anlage zielt auf eine Überblicksdarstellung, hinter der die differenzierende Reflexion der einzelnen Thesen zurück steht: Schütz geht es um die Konturierung einer Typologie. Durch die erweiterte Textgrundlage wird dabei Neues erschlossen, woraus sich anregende Impulse für die Jahrhundertwende-Forschung ergeben.Katrin Schütz’s study of gender conceptions in Lou Andreas-Salomé’s early work considers those literary texts often ignored by scholarship. The study is constructed as an overview, in light of which a differentiated reflection on the individual theses falls short: Schütz intends to formulate a typology. The expanded textual basis allows for the creation of something new, which will in turn provide inspirational impulses for turn-of-the-century research.

  17. Tummfilmiklassika kohtub maailmamuusikaga / Andreas Sepp

    Index Scriptorium Estoniae

    Sepp, Andreas

    2011-01-01

    Festivalist "Tummfilmid tõstavad häält", mis kestab 19.02.-5.03.2011. Filmi "Inimene filmikaameraga" (Venemaa, 1929) uushelindab Dead Combo, "Noored Kotkad" (Eesti, 1927/2008) Meelis Vind (Eesti) ja Napoleon Maddox (USA), "Berliin, suurlinna sümfoonia" (Saksamaa, 1927) ÖÄK, "Antenn" (Argentina, 2007) Argento Tango Fusion

  18. Inimene kronesteetilise kaameraga / Andreas W

    Index Scriptorium Estoniae

    Andreas W, pseud., 1969-

    2011-01-01

    Fotofilmifestival 14. oktoobril kinos Sõprus. Fotofilmist. Rahvusvahelisest fotofilmi konkursist "Ajatu lugu". Grand prix' pälvis Anu-Laura Tuttelberg, 2. koha Andri Allas ja Krõõt Tarkmeel, 3. koha Gerald Assouline (Prantsusmaa). Lühidalt festivalil näidatud Gusztáv Hámosi fotofilmidest (Saksamaa)

  19. Analysis of nonvolcanic tremor on the San Andreas Fault near Parkfield, CA using U.S. Geological Survey Parkfield Seismic Array

    Science.gov (United States)

    Fletcher, Jon B.; Baker, Lawrence M.

    2010-01-01

    Reports by Nadeau and Dolenc (2005) that tremor had been detected near Cholame Valley spawned an effort to use UPSAR (U. S. Geological Survey Parkfield Seismic Array) to study characteristics of tremor. UPSAR was modified to record three channels of velocity at 40–50 sps continuously in January 2005 and ran for about 1 month, during which time we recorded numerous episodes of tremor. One tremor, on 21 January at 0728, was recorded with particularly high signal levels as well as another episode 3 days later. Both events were very emergent, had a frequency content between 2 and 8 Hz, and had numerous high-amplitude, short-duration arrivals within the tremor signal. Here using the first episode as an example, we discuss an analysis procedure, which yields azimuth and apparent velocity of the tremor at UPSAR. We then provide locations for both tremor episodes. The emphasis here is how the tremor episode evolves. Twelve stations were operating at the time of recording. Slowness of arrivals was determined using cross correlation of pairs of stations; the same method used in analyzing the main shock data from 28 September 2004. A feature of this analysis is that 20 s of the time series were used at a time to calculate correlation; the longer windows resulted in more consistent estimates of slowness, but lower peak correlations. These values of correlation (peaks of about 0.25), however, are similar to that obtained for the S wave of a microearthquake. Observed peaks in slowness were traced back to source locations assumed to lie on the San Andreas fault. Our inferred locations for the two tremor events cluster near the locations of previously observed tremor, south of the Cholame Valley. Tremor source depths are in the 14–24 km range, which is below the seismogenic brittle zone, but above the Moho. Estimates of error do not preclude locations below the Moho, however. The tremor signal is very emergent but contains packets that are several times larger than the

  20. Integrating geology and geomorphology; the key to unlocking Quaternary tectonic framework of the San Andreas Fault zone in the San Gorgonio Pass region, southern California

    Science.gov (United States)

    Kendrick, K. J.; Matti, J. C.

    2012-12-01

    The San Gorgonio Pass (SGP) region of southern California is a locus of long-continued Quaternary deformation and landscape evolution within a structural complexity, colloquially referred to as a knot in the San Andreas Fault (SAF) zone. The geomorphology of the SGP region reflects the complex history of geologic events involved in the formation and resolution of this structural knot. We recognize five morphologically distinct terrains in and around SGP; the San Gorgonio Block (SGB), Yucaipa Ridge (YRB), Pisgah Peak (PPB), Kitching Peak (KPB), and Devil's Garden blocks (DGB). Morphometric analyses, including drainage density, hypsometry, topographic profiles, and stream-power measurements and discontinuities, consistently demonstrate distinctions between the blocks. Our focus in this study is on the KPB and PPB terrains, both developed in crystalline rocks of San Gabriel Mountains type. KPB is bounded on the north by the Mission Creek strand of the SAF and on the east by the Whitewater Fault; PPB is bounded on the north by the San Bernardino strand of the SAF, which continues southeastward into the core of SGP and there separates PPB from KPB. KPB has significantly greater topographic relief than PPB, and the two blocks have internal morphometric and geologic characteristics that differ significantly. Canyons in KPB lack thick Quaternary alluvial fills, and hillslopes have shed numerous bedrock landslides. Canyons in PPB contain large volumes of Middle-Pleistocene through Holocene alluvium, associated with areally extensive relict geomorphic surfaces. We use the geomorphic differences, along with geologic factors, to reconstruct tectonically driven landscape evolution over the last 100-200 Ka years. The KPB and PPB both are bounded southward by contractional structures of the San Gorgonio Pass Fault zone (SGPFZ), but geologic complexity within this zone differs markedly south of each block. South of KPB, the SGPFZ consists of multiple thrust-fault strands, some

  1. Imaging Active Faults From Earthquakes in the San Gorgonio Pass - San Bernardino Mountains-San Jacinto Region, California and the Deep Continuity of the San Jacinto and San Andreas Faults

    Science.gov (United States)

    Yue, L.; Carena, S.; Suppe, J.; Kao, H.

    2001-12-01

    We imaged and mapped in 3-D over 50 active faults and fault segments using earthquake locations and focal mechanisms. The majority of these faults are previously unknown or unnamed. The 3-D fault maps better define the active structure of this complex region marked by profound uncertainties over the fundamental structural framework, including the subsurface continuity and geometry of the first-order San Andreas and San Jacinto faults, as well as the existence and role of major blind faults. We used the catalog of 43,500 relocated 1975-1998 earthquakes of Richards-Dinger and Shearer (2000), separating them into coplanar clusters associated with different faults and fault strands and fitting optimized surfaces to them. A clustering algorithm was applied to the relocated earthquakes in order to obtain tighter earthquake clouds and thus better-defined fault surfaces. We used the catalog of 13,000 focal mechanisms of Hauksson (2000) to confirm the nature of the mapped faults. Examples of our results are as follows: [1] The major San Jacinto strike-slip fault is offset by an east-dipping thrust fault near Anza at a depth of 11-15 km, and a similar fault geometry may exist near San Bernardino. [2] We do not see any seismic illumination of an active through-going San Andreas fault at depth in the San Gorgonio Pass area, but we can place several constraints on its possible location and geometry on the basis of the 3-D geometry and distribution of other faults. Between 5 and 20 km depth, this area is dominated by closely spaced faults trending SE-NW, which in map view occupy a triangle delimited by the Mission Creek fault to the N, the San Jacinto fault zone to the E, and the San Jacinto Mountains to the S. To the E, some of these faults terminate against an E-W trending fault. These faults do not show any sign of having been displaced by an intersecting fault. Some of the faults we imaged have a surface area comparable to the size of the rupture on the Northridge thrust

  2. La literatura en la era digital: un análisis a propósito de Tierra de extracción de Doménico Chiappe y Andreas Meier

    Directory of Open Access Journals (Sweden)

    Carolina Gainza

    2013-04-01

    Full Text Available ¿En qué consiste la narrativa electrónica? ¿Cómo se produce este tipo de literatura? ¿Cuáles son las tecnologías y recursos estéticos utilizados en su producción?¿Qué efectos producen en el lector las tecnologías digitales incorporadas en la literatura electrónica? Las respuestas a éstas y otras preguntas relacionadas con la producción de la literatura electrónica serán exploradas en el presente trabajo, a partir de las propuestas teóricas de diversos autores y el análisis de la hipernovela Tierra de extracción de Doménico Chiappe y Andreas Meier.

  3. see Gupta VK 433 Andreev V see Porcellato AM 963 Antony J see ...

    Indian Academy of Sciences (India)

    Prasad J see Chopra S. 753. Prasad Moonooku see Pande S A. 859. Prasad R L. CO2 laser photoacoustic spectra and vibra- tional modes of heroin, morphine and narco- tine. 487. Priller Alfred see Vockenhuber Christof. 1041. Puri Rajeev K. Fragment production in 16O ·80Br reaction within dynamical microscopic theory.

  4. Antony Osler. 2008. "Stoep Zen – A Zen Life in South Africa ...

    African Journals Online (AJOL)

    The pale sun sets. The shadows creep across my shoes. Soon it will be time for meditation, Then a whiskey (104). Full Text: EMAIL FULL TEXT EMAIL FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT · AJOL African Journals Online. HOW TO USE AJOL... for Researchers · for Librarians · for Authors · FAQ's ...

  5. Concrete in the education of the architect Antoni Gaudí

    OpenAIRE

    Saura Carulla, Magdalena

    2015-01-01

    A collaborative dimension on concrete business accounts for the education of a Gaudí's modernismo modernized. Eusebi Güell (1853–1926) met the young architect in the International Paris Exhibition of 1879. At the same period of time, Güell was transferring technology from the U.S. of America to Barcelona with other industrialists such as J. Francisco de Navarro (1823–1909). Their joint Portland cement industry played a major role in the evolution of concrete construction in Spain and in the w...

  6. Verandering van geloofsvoorstelling : analyse van legitimaties door Antony Flew, Cees Dekker en Raymond Bradley

    NARCIS (Netherlands)

    Pronk, Michiel

    2016-01-01

    Revision of beliefs is a common practice. An opinion that once was considered right, is now considered wrong. The interest in this study is in the revision of religious beliefs. Research questions in this dissertation are: (1) How do people justify their revision of religious beliefs? (2) How did

  7. Cretaceous to Cenozoic sequential kinematics in the forearc-arc transition: effects of changing oblique plate convergence and the San Andreas system with implications for the La Paz fault (southern Baja California, Mexico)

    Science.gov (United States)

    Mattern, Frank; Pérez Venzor, José Antonio; Pérez Espinoza, Jesus Efraín; Rochin, Joel Hirales

    2010-01-01

    We studied metasediments and mylonitic arc granitoids from the forearc-arc transition of southern Baja California, Mexico. Thin section analyses and field evidence show that metamorphism of the forearc-arc transition is of the high T/P active margin type. The heat was provided by Cretaceous arc intrusions. Field observations and thin section analyses, including the time/temperature deformation path, demonstrate that the study area was first affected by dextral, ductile shearing followed by ductile, sinistral, possibly transpressive strike-slip parallel to the magmatic arc during the Cretaceous. Both intervals are related to changing oblique plate convergence and, thus, identified as trench-linked strike-slip effects. The geometric relationship between arc-dipping foliation, stretching lineation and shear sense indicates that the arc may have been pressed onto the rocks of the study area during sinistral shearing. The sinistral interval lasted up until regional cooling (Early Cenozoic?). Because the La Paz fault is closely associated with the forearc-arc transition, it must have the same Cretaceous to Early Cenozoic kinematic history. The northern segment of the La Paz fault is a modern, brittle, strike-slip fault interpreted as a dextral synthetic fault of the San Andreas system which opened the Gulf of California (Mar de Cortés/Golfo de California). We found no evidence for Miocene Basin and Range extension.

  8. Autorität und Authentizität: Zum Verhältnis von Text und Siegel-Bild am Beispiel des Rechtsgutachtens Giovanni d’Andreas vom 9.5.1329

    Directory of Open Access Journals (Sweden)

    Ruth Wolff

    2008-01-01

    Full Text Available The analysis of the consilium of the famous canonist Giovanni d’Andrea and three of his Bolognese colleagues from 9th May 1329 reveals that legal consilia in the fourteenth century were usually authenticated both with the signature and signum of the notary drafting the document and with the seals of the jurists. Three of the seal impressions formerly appended to the document illustrate in a strikingly similar fashion a detailed image widely disseminated on seals of jurists in medieval Italy: the doctor sitting enthroned in the cathedra, turned towards the viewer and at the same time concentrated on the open book in his hands. The image is a sympathetic visualisation of the basic scheme of the consultation of the legal doctors, i. e. the transmission of the theoretical legal knowledge of the studium to the world outside the university, which is exemplified in the text of the document in a specific casus. Seals of medieval jurists bear an effigy of the owner of the seal, like other seals of high-ranking persons, such as emperors, kings and bishops. Thereby, and by the insistent repetition of a picture form which can be distinguished clearly by its three dimensionally refined visual idiom from the seals of emperors, kings and bishops, the seals of doctors of law advertise themselves as sigilla authentica which enjoy absolute credibility.

  9. Late Quaternary slip history of the Mill Creek strand of the San Andreas fault in San Gorgonio Pass, southern California: The role of a subsidiary left-lateral fault in strand switching

    Science.gov (United States)

    Kendrick, Katherine J.; Matti, Jonathan; Mahan, Shannon

    2015-01-01

    The fault history of the Mill Creek strand of the San Andreas fault (SAF) in the San Gorgonio Pass region, along with the reconstructed geomorphology surrounding this fault strand, reveals the important role of the left-lateral Pinto Mountain fault in the regional fault strand switching. The Mill Creek strand has 7.1–8.7 km total slip. Following this displacement, the Pinto Mountain fault offset the Mill Creek strand 1–1.25 km, as SAF slip transferred to the San Bernardino, Banning, and Garnet Hill strands. An alluvial complex within the Mission Creek watershed can be linked to palinspastic reconstruction of drainage segments to constrain slip history of the Mill Creek strand. We investigated surface remnants through detailed geologic mapping, morphometric and stratigraphic analysis, geochronology, and pedogenic analysis. The degree of soil development constrains the duration of surface stability when correlated to other regional, independently dated pedons. This correlation indicates that the oldest surfaces are significantly older than 500 ka. Luminescence dates of 106 ka and 95 ka from (respectively) 5 and 4 m beneath a younger fan surface are consistent with age estimates based on soil-profile development. Offset of the Mill Creek strand by the Pinto Mountain fault suggests a short-term slip rate of ∼10–12.5 mm/yr for the Pinto Mountain fault, and a lower long-term slip rate. Uplift of the Yucaipa Ridge block during the period of Mill Creek strand activity is consistent with thermochronologic modeled uplift estimates.

  10. Structure of the San Bernardino Basin Along Two Seismic Transects: Rialto-Colton Fault to the San Andreas Fault and Along the I-215 Freeway (I-10 to SR30)

    Science.gov (United States)

    Catchings, R.D.; Rymer, M.J.; Goldman, M.R.; Gandhok, G.; Steedman, C.E.

    2008-01-01

    show internal consistency and consistency with other existing geophysical data. Collectively, the data suggest that the I-215 freeway trends along the faulted edge of a pull-apart basin, within a zone where the principal slip of the San Jacinto Fault is transferred to the San Andreas Fault. Because the I-215 freeway trends at low angles to these flower-structure faults, both primary and numerous secondary faults are apparent between the I-10 exchange and State Road-30, suggesting that much of the 8-km-long segment of the I-215 freeway could experience movement along primary or secondary faults.

  11. Cognitive Assessment and Prediction to Promote Individualized Capability Augmentation and Reduce Decrement (CAPT PICARD), Phase II

    Data.gov (United States)

    National Aeronautics and Space Administration — NASA missions include long periods of low workload followed by sudden high-tempo operations, a pattern that can be detrimental to situational awareness and...

  12. Picard Approximation of Stochastic Differential Equations and Application to LIBOR Models

    DEFF Research Database (Denmark)

    Papapantoleon, Antonis; Skovmand, David

    The aim of this work is to provide fast and accurate approximation schemes for the Monte Carlo pricing of derivatives in LIBOR market models. Standard methods can be applied to solve the stochastic differential equations of the successive LIBOR rates but the methods are generally slow. Our...

  13. Col F.F. Pienaar's Boer war diary (Part I) | Picard | Scientia Militaria ...

    African Journals Online (AJOL)

    Scientia Militaria: South African Journal of Military Studies. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 23, No 3 (1993) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register. Col F.F. Pienaar's Boer war diary ...

  14. Lt Col F.F. Pienaar's boer war diary | Picard | Scientia Militaria: South ...

    African Journals Online (AJOL)

    Scientia Militaria: South African Journal of Military Studies. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 23, No 4 (1993) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register. Lt Col F.F. Pienaar's boer war ...

  15. Col F.F. Pienaar's Boer war diary (Part I) | Picard | Scientia Militaria ...

    African Journals Online (AJOL)

    Scientia Militaria: South African Journal of Military Studies. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 23, No 3 (1993) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register · Download this PDF file ...

  16. Cognitive Assessment and Prediction to Promote Individualized Capability Augmentation and Reduce Decrement (CAPT PICARD), Phase I

    Data.gov (United States)

    National Aeronautics and Space Administration — Manned NASA missions include long periods of low workload, followed by sudden, high tempo operations. This can be detrimental to situational awareness and...

  17. Stable cohomology of the universal Picard varieties and the extended mapping class group

    DEFF Research Database (Denmark)

    Ebert, Johannes; Randal-Williams, Oscar

    2012-01-01

    We study the moduli spaces which classify smooth surfaces along with a complex line bundle. There are homological stability and Madsen--Weiss type results for these spaces (mostly due to Cohen and Madsen), and we discuss the cohomological calculations which may be deduced from them. We then relat...

  18. Parem teine kui viimane / Andreas Kaju

    Index Scriptorium Estoniae

    Kaju, Andreas

    2006-01-01

    Internet peaks olema kõikidele Eesti inimestele tagatud põhiõigus. Sama ka Võrumaa Teataja 25. mai 2006, lk. 2 ; Põhjarannik 25. mai 2006, lk. 2 ; Koit 25. mai 2006, lk. 6 ; Meie Maa 25. mai 2006, lk. 2 ; Sakala 26. mai lk. 2 ; Vooremaa 30. mai 2006, lk. 2 ; Hiiu Leht 30. mai 2006, lk. 2 ; Elva Postipoiss 3. juuni 2006, lk. 4 : Lääne Elu 30. mai 2006, lk. 2, pealkiri kujul : Tasuta internet etrvele riigile - parem teine kui viimane

  19. Mida ootame Res Publica poliitikutelt? / Andreas Kaju

    Index Scriptorium Estoniae

    Kaju, Andreas

    2003-01-01

    Res Publica Juventus on piirkondadele saadetud küsitlustega otsinud vastuseid mitmetele probleemidele. Eesmärk Res Publica poliitilise käitumise raamide määramine. Tabel: Juventuse küsimused piirkondadele

  20. Raymond Pettibon, Ameerika, Eesti / Andreas Trossek

    Index Scriptorium Estoniae

    Trossek, Andreas, 1980-

    2011-01-01

    Ameerika iseõppinud nüüdiskunstniku loomingust - tekstiga joonistused, videokunst, installatsioonikunst. Osales Tallinna XV graafikatriennaalil. Kunstniku ema Õie Peters põgenes sõja eest Saksamaale, onu Otto Peters (1919-) oli "soomepoiss"

  1. Ettevaatust, disain! / Ilka Ruby, Andreas Ruby

    Index Scriptorium Estoniae

    Ruby, Ilka

    2010-01-01

    Berliinis elavad arhitektuuri- ja kunstikriitikud disaini fetišeerimisest kaasaegses arhitektuuri avangardis. "Hea" disaini kasutamisest kurja jõu väljendusena filmikunstis. Kasutuspõhisest lähenemisest arhitektuurile

  2. Õhtupoolik Tallinna kunstigaleriides / Andreas Trossek

    Index Scriptorium Estoniae

    Trossek, Andreas, 1980-

    2008-01-01

    Moskva kunstniku Andrei Monastõrski isiknäitus Tallinna Kunstihoones. Austria kunstnike Thomas Hörl'i ja Peter Kozek'i näitus Tallinna Linnagaleriis. Näitus "Up Close and Personal" Draakoni ja Hobusepea galeriis, kuraator Marge Monko

  3. Estnische Klaviermusik / Andreas K. W. Meyer

    Index Scriptorium Estoniae

    Meyer, Andreas K. W.

    1995-01-01

    Uuest heliplaadist "Estnische Klaviermusik. Mägi: Die alte Kannel; Kangro: Suite op. 1; Rääts: Toccata; Sumera: Stück aus dem Jahre 1981; Tüür: Sonate; Vähi: Fata Morgana; Pärt: Partita. Lauri Väinmaa (Klavier)" (AD: 1993). Finlandia/East West Records CD 4509-95704-2 (WD:57'08")

  4. Uma Tradução Anotada de Antony and Cleopatra: Propósitos e Procedimentos

    Directory of Open Access Journals (Sweden)

    José Roberto O’Shea

    1996-01-01

    Full Text Available A PARTIR DO INÍCIO DESTE SÉCULO, estudiosos de Shakespeare passaram a demonstrar interesse pela recepção da obra do poeta e dramaturgo inglês "no exterior". Como seria de se esperar, o estudo da recepção da obra shakespeariana tem passado pelo estudo de sua tradução. No caso da dramaturgia, a partir da década de 1960, com o desenvolvimento dos estudos literários e dramáticos e, ainda, dos estudos da tradução, as traduções têm sido estudadas sob diversos métodos analíticos, a partir de diversas abordagens — textual, contextual, dramática, cultural, etc. —, servindo, freqüentemente, como suporte para validação desta ou daquela teoria. Contudo, apesar do muito que tem sido dito e escrito a respeito de Shakespeare em tradução, a importância que traduções de sua obra poética e dramática têm exercido na disseminação mundial de sua arte e mesmo no estabelecimento de sua posição central no cânone ocidental não têm recebido a devida ênfase. Na verdade, precisamos nos lembrar deque Shakespeare escreveu em um idioma, que, na Renascença, estava longe de ser hegemônico e que, portanto, precisaria ser traduzido.

  5. De cómo acabar la iglesia de la Colonia Güell obra de Antoni Gaudí

    Directory of Open Access Journals (Sweden)

    José Luis González

    2000-12-01

    Full Text Available La conservación de una obra inacabada de Gaudí esconde un complejo panorama de implicaciones históricas, psicológicas, estructurales y funcionales que se añaden al mito que rodea la obra del maestro catalán. El artículo profundiza en el concepto del templo, presenta unas primeras reflexiones y plantea un proyecto de intervención que renuncia en todo momento a la continuación y la recreación de la obra de Gaudí, sin eludir el difícil problema de la permanencia definitiva de la obra inacabada.

  6. Reply to “Comment on ‘Ground motions from the 2015 Mw 7.8 Gorkha, Nepal, earthquake constrained by a detailed assessment of macroseismic data’ by Stacey S. Martin, Susan E. Hough, and Charleen Hung” by Andrea Tertulliani, Laura Graziani, Corrado Castellano, Alessandra Maramai, and Antonio Rossi

    Science.gov (United States)

    Martin, Stacey S.; Hough, Susan E.

    2016-01-01

    We thank Andrea Tertulliani and his colleagues for their interest in our article on the 2015 Gorkha earthquake (Martin, Hough, et al., 2015), and for their comments pertaining to our study (Tertulliani et al., 2016). Indeed, as they note, a comprehensive assessment of macroseismic effects for an earthquake with far‐reaching effects as that of Gorkha is not only critically important but is also an extremely difficult undertaking. In the absence of a widely known web‐based system, employing a well‐calibrated algorithm with which to collect and systematically assess macroseismic information (e.g., Wald et al., 1999; Coppola et al., 2010; Bossu et al., 2015) in the Indian subcontinent, one is left with two approaches to characterize effects of an event such as the Gorkha earthquake: a comprehensive ground‐based survey such as the one undertaken in India following the 2001 Bhuj earthquake (Pande and Kayal, 2003), or an assessment such as Martin, Hough, et al. (2015) akin to other contemporary studies (e.g., Nuttli, 1973; Sieh, 1978; Meltzner and Wald, 1998; Martin and Szeliga, 2010; Ambraseys and Bilham, 2012; Mahajan et al., 2012; Gupta et al., 2013; Singh et al., 2013; Hough and Martin, 2015; Martin and Hough, 2015; Martin, Bradley, et al., 2015; Ribeiro et al., 2015), based primarily upon media reports and other available documentary accounts.

  7. Andreas Groll: fotografie pro moravskou šlechtu

    Czech Academy of Sciences Publication Activity Database

    Trnková, Petra

    -, č. 17 (2015), s. 109-117 ISSN 1214-5327 R&D Projects: GA MK(CZ) DF11P01OVV033 Keywords : And reas Groll (1812-1872) * photography * history * 19th century * architecture * portrait Subject RIV: AL - Art, Architecture, Cultural Heritage

  8. The code-breaking artist Kristina Norman / Andreas Trossek

    Index Scriptorium Estoniae

    Trossek, Andreas, 1980-

    2009-01-01

    Eestit 53. Veneetsia biennaalil kunstiprojektiga "After-War" (kuraator Marko Laimre) esindanud kunstnikust Kristina Normanist ja tema loomingust (pseudo-dokumentaalfilm "The Field of Genius/Geeniuse väli" (2003), joonistused "Mysterious Radio" (2004), video "Contact" (2005), dokumentaalfilmid "Pribalts" (2006) ja "Monolith/Monoliit" (2007)). Tõnismäe monumendist Tallinnas, pronksiöö sündmustest. Teise maailmasõja lõpu erinevast tähendusest

  9. Francisco Valles Covarrubias: o galenismo renascentista depois de Andreas Vesalius

    Directory of Open Access Journals (Sweden)

    Madeira, João

    2009-01-01

    Full Text Available Francisco Valles, também conhecido como “El Divino Valles”, foi provavelmente o maior médico espanhol da Renascença e sucedeu a André Vesálio, a quem conheceu pessoalmente, como médico de câmara de Felipe II da Espanha. Formado em Alcalá, deixou inúmeras obras, incluindo o influente Controversiarum medicarum et philosophicarum. A importância da contribuição de Valles para o debate sobre o número, as funções e a localização dos sentidos internos em Aristóteles e em Galeno é atestada pela apreciação que recebeu de Pedro da Fonseca e pela sua relevância para o estudo da história da filosofia e da anatomia, na antiguidade, no Renascimento e na escolástica

  10. Kaduvusele kalduvad alternatiivid majas nr. 0 / Andreas Trossek

    Index Scriptorium Estoniae

    Trossek, Andreas, 1980-

    2002-01-01

    Prantsuse kunstnikekoloonia (Delphine Reist, Laurent Faulon, Sebastien Perroud) ja viiuldaja Mathieu Werchowsky Tallinnas valminud installatsiooninäitus "Neli laulu Siivile" vanas Kalinini tehasehoones 7.-12. juunini. Kunstnikud jätavad installatsiooni saatuse hooleks ja lähevad mujale

  11. Püha Platoni ordeni sai kaks saarlast / Isa Andreas

    Index Scriptorium Estoniae

    Andreas, Isa

    2009-01-01

    Püha Platoni päeval päeval jagas metropoliit Stefanus püha Platoni ordeneid aktiivsetele kirikutegelastele ning pühitseti Tartu piiskopiks arhimandriit Eelija(Ojaperv) ja Pärnu ja Saare piiskopiks arhimandriit Aleksander (Hopjorski)

  12. Kohtuotsa vaateplatvorm täitub suveks kunstidega / Andreas Sepp

    Index Scriptorium Estoniae

    Sepp, Andreas

    2011-01-01

    Peke Eloranta tutvustab Kohtuotsa vaateplatvormi minifestivalide sarja "Lustid". 17.-21.08.2011 toimuvast näitustesarjast "Visual walk - kunst kutsub Toompeale". Septembri algul toimuvast 3. Luscher&Matieseni filmifestivalist. Peke Elorantast

  13. Hegemooniline tähistamisprotsess fotograafias / Andreas Ventsel

    Index Scriptorium Estoniae

    Ventsel, Andreas, 1976-

    2010-01-01

    Analüüsitakse "rahva" kujutamist Stalini-aja Nõukogude Eesti meedias ilmunud fotodel ja kuidas võimusuhe fotodel on konstrueeritud. Käsitletakse Tartu-Moskva kultuurisemiootika ja Essexi dikursuseteoreetilisi ideid, Roland Barthes'i ja visuaalretoorika fotograafiaalaseid seisukohti kui analüüsimeetodeid, mille tulemusena eristatakse neli hegemoonilist tähistamisstrateegiat fotograafias

  14. [Andreas Vesalius, distinguished surgeon of the 16th century].

    Science.gov (United States)

    Van Hee, R

    1996-01-01

    The author gives here some considerations about A. Vesalius through his life and his works as a surgeon. He was the father of the anatomical revolution against Galen but was also an eminent clinician and surgeon. He was immediately able to adapt his surgical practice whenever the promising methodology was identified (see Consilia). The author concludes with a critical analysis of the Chirurgia magna in septem libros digesta attributed to A. Vesalius.

  15. Scientific drilling into the San Andreas Fault Zone

    Science.gov (United States)

    Zoback, Mark; Hickman, Stephen; Ellsworth, William

    2010-01-01

    This year, the world has faced energetic and destructive earthquakes almost every month. In January, an M = 7.0 event rocked Haiti, killing an estimated 230,000 people. In February, an M = 8.8 earthquake and tsunami claimed over 500 lives and caused billions of dollars of damage in Chile. Fatal earthquakes also occurred in Turkey in March and in China and Mexico in April.

  16. Pärt, Arvo. Litany; Psalom; Trisagion / Andreas Obst

    Index Scriptorium Estoniae

    Obst, Andreas

    1996-01-01

    Pärt, Arvo. Litany; Psalom; Trisagion. Hilliard Ensemble, Estonian Philharmonic Chamber Choir, Tallinn Chamber Orchestra, Tõnu Kaljuste; Lithuanian Chamber Orchestra, Saulius Sondeckis. ECM 1592/449 810-2

  17. Kuidas tõlkida loojaid riigiametnikele ja vastupidi? / Andreas Sepp

    Index Scriptorium Estoniae

    Sepp, Andreas

    2010-01-01

    Oktoobris 2010 toimus Tallinna Ülikooli Balti Filmi- ja Meediakooli korraldatud loengusari "Creative and Cultural Industries Policy in Europe", kus keskenduti Euroopa Liidu loomemajanduse regulatiivpoliitikale. Kursuse viisid läbi õppejõud Bernd Hartmann ja Jan Runge Saksamaalt

  18. Contribution to the Study of Matteo Moronzon di Andrea

    Directory of Open Access Journals (Sweden)

    Barbara Španjol-Pandelo

    2016-01-01

    Full Text Available Matteo Moronzon, a member of the Venetian family of woodcarvers, was mentioned for the first time in 1407 according to the present known archival documents. Probably after being trained in his father's workshop in Venice, he moved to Zadar with his family – his wife Francisca and sons Pietro and Francesco. In 1418 he undertook the commission of furnishing carved choir stalls for the cathedral of St. Anastasia in Zadar. Various archival documents testify that Matteo lived and worked in Zadar for many years. Therefore it can be assumed that he probably founded his own workshop in Zadar where his son Francesco was trained too. Apart from the attempt to reconstruct Matteo's life and career, the aim of this paper is to interpret one important woodcarving work of art preserved in situ: choir stalls in the former cathedral of Rab, today the arch parish church of the Assumption of the Blessed Virgin Mary in Rab. Without doubt Matteo was the master carver in the production of the choir stalls in Zadar. Since he lived in Zadar it was not unusual that he had the main role in carving the stalls. In Zadar the selection of motives is more balanced and there are no significant differences in the modelling of decorative elements. However, the question whether Matteo carved absolutely everything or he had assistants arises. Considering the amount of work that had to be done it must be assumed that he had assistants who participated in work and helped him to shape the stalls. However, in literature Matteo was considered the only and undisputed author of the choir stalls in Zadar, mostly because of the preserved document. The analysis of the choir stalls in Rab by Ivo Petricioli as well as their evident formal and stylistic similarities with the stalls from the cathedral in Zadar have led to the general acceptance of the hypothesis that they were carved at the workshop of Matteo Moronzon. However, a comprehensive comparative analysis that could confirm that hypothesis was still missing. The analysis of the details and the whole led to the overall conclusion that there were a huge number of similarities between the choir stalls in Rab and Zadar. Therefore it was concluded that Matteo was the principal designer of the choir stalls in Rab who also carved the best parts in Rab, while others, less successful parts, were made by his apprentices and assistants who at the time lived on the island of Rab. In this respect, if Matteo was accepted as the author of the choir stalls of the cathedral in Zadar he must also be accepted as the author of the choir stalls from the excathedral in Rab.

  19. ATM-dialoog Arne Maasiku ainetel / Andreas Trossek, Aleksander Tsapov

    Index Scriptorium Estoniae

    Trossek, Andreas, 1980-

    2008-01-01

    Kuni 17. II Tallinna Kunstihoones avatud Arne Maasiku fotode näitusest (kuraator Karin Paulus, kujundaja Urmas Luure) ja fotoalbumist "Fotod : 1994-2007" (tekstide autorid Eero Epner, Peeter Laurits, Jan Kaus, kujundaja Martin Pedanik)

  20. Kas Tallinn vajab uut brändi? / Andreas Sepp

    Index Scriptorium Estoniae

    Sepp, Andreas

    2010-01-01

    Tallinnas viibinud saksa loomemajanduse õppejõudude Bernd Hartmanni ja Jan Runge sõnul on kultuuripealinna aasta hea võimalus linnakuvandi parandamiseks. Nende arvates võiks Tallinn kultuuripealinna raames anda noortele disaineritele ja filmitegijatele loomingu eksponeerimiseks piisavalt võimalusi ning keskenduda kohaliku kultuurielu parandamisele

  1. Lauluväljaku uus skulptuur visualiseerib heli / Andreas Sepp

    Index Scriptorium Estoniae

    Sepp, Andreas

    2011-01-01

    14. mail Tallinna lauluväljakul Euroopa kultuuripealinna segakoori kontserdiga avatavast saksa skulptori Lukas Kühne loodud akustilisest skulptuurist "Chromatico". Teose arhitekt on Rosario Nuin (Uruguay), ehitas Nordecon Betoon

  2. Andreae is New Editor of Global Biogeochemical Cycles

    Science.gov (United States)

    Andreae, Meinrat O.

    2004-10-01

    As the incoming editor of Global Biogeochemical Cycles, I would like to introduce myself and my ideas for the journal to Eos readers and to current and potential GBC authors. I've had a somewhat ``roaming'' scientific evolution, coming from ``straight'' chemistry through hard-rock geochemistry to chemical oceanography, the field in which I did my Ph.D. I taught marine chemistry at Florida State University for a number of years, and developed an interest in ocean/atmosphere interactions and atmospheric chemistry. In 1987 I took on my present job at the Max Planck Institute for Chemistry, in Mainz, Germany, and, after leaving the seacoast, my interests shifted to interactions between the terrestrial biosphere and atmosphere, including the role of vegetation fires. My present focus is on the role of biogenic aerosols and biomass smoke in regulating cloud properties and influencing climate.

  3. Rezension: Andrea Ploder (2014. Qualitative Forschung als strenge Wissenschaft?

    Directory of Open Access Journals (Sweden)

    Uwe Dörk

    2016-01-01

    Full Text Available Die Studie "Qualitative Sozialforschung als strenge Wissenschaft?" richtet sich auf die Rezeption Edmund HUSSERLs in der deutschsprachigen Methoden- und Methodologienliteratur in der qualitativen Sozialforschung. Wie die Autorin zeigt, ist die HUSSERL-Lektüre hochgradig von Alfred SCHÜTZ geprägt, ohne aber in ihr aufzugehen, da sie auch auf Originaltexte rekurriert. Diese Lektüre wird hier anhand von a priori festgelegten Untersuchungskriterien wie adäquat, modifizierend, affirmativ etc. danach untersucht, wie gründlich sie verlief und welche Potenziale der Originaltexte dabei verschenkt wurden. Das Ergebnis der Untersuchung ist wichtig, da "Verstehen" ein Leitbegriff der qualitativen Sozialforschung ist. URN: http://nbn-resolving.de/urn:nbn:de:0114-fqs160119

  4. Moskva pisaraid ei usu, jätkuvalt / Andreas Trossek

    Index Scriptorium Estoniae

    Trossek, Andreas, 1980-

    2007-01-01

    Moskva 2. kaasaegse kunsti biennaal kuni 1. IV Föderatsiooni tornis, TsUMi kaubamajas, Shtshussevi arhitektuurimuuseumis, Zurabi galeriis jm. Biennaali direktor Joseph Backstein. Eestist osalevad näitusel Liina Siib ja Eleonore De Montesquiou, kelle projektid on valinud välja Leedu kuraator Lolita Jablonskiene. Lühidalt Ole Kuliku kuraatoriprojektist "Usun: kunstilise optimismi projekt"

  5. Poesia contemporània i pintura: Salvador Espriu i Miquel Martí i Pol en l'obra d'Antoni Miró

    Directory of Open Access Journals (Sweden)

    Carles Cortés

    2014-02-01

    el grau de concreció dels poemes i dels collages, de manera que també hi hem pogut establir diversos paral·lelismes discursius i expressius, com ara els referits al pas del temps, l’angoixa pel passat i l’esperança pel futur. La principal aportació de Miró al sistema conceptual dels dos poetes és, sens dubte, el tractament de l’erotisme del cos femení a l’hora d’abordar diverses reflexions existencials localitzables en els seus poemaris.

  6. Antony Flew Del ateísmo al teísmo por la razón científica

    Directory of Open Access Journals (Sweden)

    Javier Monserrat

    2015-01-01

    Full Text Available Nos hemos referido principalmente en los últimos números de Pensamiento a lo que se ha venido en llamar en la última década el Nuevo Ateísmo, representado por Richard Dawkins, Daniel Dennett, Sam Harris y Christopher Hitchens. Stephen Hawking no pertenece a este grupo, pero sus ideas han sido comentadas con frecuencia en relación a la cuestión de Dios. Por ello, hemos abordado también una discusión de su idea del universo y su referencia a Dios. El Nuevo Ateísmo da por supuesto que la ciencia moderna excluye taxativamente la existencia de Dios. Sin embargo, estos no son los únicos ateos. Tanto desde el campo de la ciencia (vg. Steven Weinberg, Carl Sagan, el mismo Roger Penrose, como igualmente desde el campo de la filosofía en los últimos siglos y en la actualidad, numerosos pensadores han llenado las filas del ateísmo. La filosofía clásica de la modernidad dogmática fue atea en gran parte; de ahí la dificultad, mantenida durante siglos, de que se entablase un diálogo entre el teísmo cristiano antiguo y aquel ateísmo dogmático de la modernidad.

  7. Chemical and mineralogical analyses of Roman amphorae from Augustan period recovered at the production center of Sant Antoni de Calonge (Gerona, Spain); Analisis quimico y mineralogico de un conjunto de anforas romanas de epoca augustea procedentes del centro productor de Sant Antoni de Calonge (Gerona)

    Energy Technology Data Exchange (ETDEWEB)

    Vila Socias, L.; Prats Pico, N.; Buxeda Garrigos, J.

    2016-05-01

    Amphorae were the most popular transport vessels used to ship wine and other commodities in Antiquity. This paper reports the results of the analyses of 38 samples of several Roman amphorae types recovered at Calonge (Gerona, Spain). Chemical composition of individuals have been obtained by means of XRF. Equivalent firing temperatures have been estimated by XRD and further refiring experiments have been performed. The results suggest the existence of two different clay pastes among individuals analyzed, most of which were fired at the range 900-1000 degree centigrade. Moreover, it is argued that craftsmen did not follow highly standardized paste preparation process during the first activity period of the workshop. The results are discussed in terms of production technology and standardization. (Author)

  8. Meλetai versificatoriae generosorum iuvenum Andrea et Alexandri Chodcievitiorum – exemplum scholasticae poeseos christianae Europeae. Kilmingųjų jaunuolių Andriaus ir Aleksandro Chodkevičių eilėdarinės Meλetai – Europos krikščioniškos mokyklinės poezijos pavyzdys

    Directory of Open Access Journals (Sweden)

    Tomas Veteikis

    2009-01-01

    Full Text Available Straipsnyje, kuris parengtas pagal pranešimą, skaitytą 2008 m. lapkričio 12–15 d. Vilniaus universitete vykusioje konferencijoje Colloquium Balticum VIII Vilnense, pristatomas Lietuvoje mažai žinomas lei­dinys, parengtas vokiečių poeto ir filologo Johano Milijaus, išleistas 1568 m. Leipcige su sudėtine antrašte: Iohannis Mylii Libenrodensis, Poetae lau­reati, Cato Graecolatinus. Praecipua Christianae pietatis Capita. Mel#tai D. Andreae & D. Alexandri Chodcieuitiorum, illustrium magni Lithuaniae Duca­tus Equitum. Omnia in gratiam studiosae iuuentutis publicata. Cum Gratia & Priuilegio Caesareo. M. D. LXVIII. Gilinamasi į nedidelę leidinio dalį, apimančią LDK didiko, Trakų ir Vilniaus pilininko, Lietuvos ir Lenkijos didžiojo etmono Grigo Chodkevičiaus sūnų Andriaus ir Aleksandro, kuriuos tėvo dvare mokė ir į mokslus lydėjo tas pats J. Milijus, lotyniškus eilėraš­čius, aptariama jų tematika, santykis su kitais leidinio tekstais, stilistinės ypatybės, pateikiama pastebėjimų dėl imitacijos ir originalumo. Aptariamieji jaunųjų Chodkevičių tekstai iliustruoja lotynų kalbos, tikėjimo pagrindų ir krikščioniškos etikos įsisavinimo litera­tūrinėmis priemonėmis mechanizmą, būdingą XVI a. Europos švietimui. Kalbos mokymasis neatsiejamas nuo tikybos ir kasdieninio elgesio taisyklių; šios temos vyrauja Chodkevičių eilėse. Vis dėlto vienas kitas kūrinėlis nutolsta nuo religijos ir liturgijos, paliečia universalius gyvenimo dėsnius, minėtus Antikos iš­minčių, filosofų ir poetų. Straipsnyje pateikiama viena kita įžvalga dėl lietuviškos tematikos. Antai Andriaus Chodkevičiaus eilėraštyje Anacharsis Hannoni, su­kurtame kaip Cicerono Tuskulo disputų epizodo (Cic. Tusc. 5, 32, 90 parafrazė, galima regėti tuometinių lietuvių ir totorių papročių analizės, reikštos XVI a. publicistiniuose Mykolo Lietuvio, Augustino Rotundo ir kt. veikaluose, atgarsių. Straipsnyje atkreipiamas

  9. Oulebsir Nabila et Volait Mercedes (dir., L’Orientalisme architectural entre imaginaires et savoirs, Paris, CNRS et Picard, 2009, 300 p.

    Directory of Open Access Journals (Sweden)

    Rémi Labrusse

    2009-11-01

    Full Text Available D’usage potentiellement aussi large qu’est vague la notion d’Orient dont il est issu, le terme « orientalisme », en histoire de l’art et de l’architecture, sert le plus souvent, faute de mieux, à caractériser l’emploi de formes issues des arts de l’Islam, décontextualisées puis réappropriées dans le cadre de pratiques propres à la culture occidentale (celles-ci fussent-elles endossées par des artistes non-occidentaux. Ces pratiques, le xixe siècle, pour des raisons à la fois scientifiques (l...

  10. Análisis químico y mineralógico de un conjunto de ánforas romanas de época augústea procedentes del centro productor de Sant Antoni de Calonge (Gerona

    Directory of Open Access Journals (Sweden)

    Llorenç Vila Socías

    2016-01-01

    Full Text Available Las ánforas representan el envase cerámico más popular usado en la antigüedad para el transporte de vino y otros productos. En este trabajo se han analizado un total de 38 fragmentos de diversas tipologías de ánforas romanas procedentes del yacimiento de Calonge (Gerona. Se ha aplicado la FRX para determinar la composición elemental de las cerámicas y la DRX para estimar las temperaturas de cocción equivalentes. Este estudio arqueométrico se ha complementado con un experimento de recocido. Los resultados sugieren el uso de 2 pastas diferentes para la producción de las ánforas, para la mayoría de las cuales se estiman unas temperaturas de cocción equivalentes en el rango 900-1.000 °C. Así mismo se demuestra que la composición de las pastas arcillosas no se mantuvo constante durante la primera fase de actividad del taller. Los resultados son discutidos en términos de tecnología y de estandarización de la producción.

  11. La loi « Don’t Ask, Don’t Tell » vue par deux photographes américains : Jeff Sheng et Antony Loverde

    Directory of Open Access Journals (Sweden)

    Clément Massé

    2011-04-01

    Full Text Available Avec la loi « Don’t Ask, Don’t Tell », la photographie américaine s’est emparée d’un nouveau sujet. Signée par Bill Clinton en 1993 et abrogée par Barack Obama le 22 décembre 2010, cette loi a interdit pendant dix-sept ans à toute personne servant dans l’armée américaine d’afficher son orientation homosexuelle, bisexuelle ou transsexuelle. Le dire, c’était l’assurance d’être démobilisé et renvoyé, quels que soient les états de service du soldat visé.En 2010, dans les mois qui ont précédé l’ab...

  12. Pecat amagat és mitg perdonat.... La polèmica entre mossèn Gudiol i Antoni Bulbena arran de les edicions bibliòfiles de llibres eròtics

    Directory of Open Access Journals (Sweden)

    Albert Domènech

    2014-06-01

    Full Text Available El desembre de 1911 aparegué a la premsa local de Vic un article que va aixecar molta polseguera entre els bibliòfils de tot Catalunya. Un mossèn –historiador de l’art i gran moralistaacusava un conegut editor de llibres de bibliofília –sense dir-ne el nom-, d’editar llibres luxosos de contingut priàpic (pornogràfic. Aquest fet anecdòtic ens serveix per saber qui era l’editor esmentat, què hi havia de cert en l’»acusació» i com va encaixar el vituperat veure’s exposat a la vergonya pública. La correspondència creuada entre els dos protagonistes, exclusivament per mitjà d’un amic comú, ens facilita l’anàlisi de l’argumentari de l’un i de l’altre. Això ens permet copsar com s’entenia, des de la moral més conservadora a la d’un moderat lliurepensament, l’ampli arc que va de la literatura de temàtica amorosa a les obres clarament pornogràfiques. In December 1911 appeared in the local press in Vic (a town near Barcelona an article that raised an uproar in the bibliophile circles all over Catalonia. A priest (an Art historian and great moralist accused a well-known editor of fine books, without naming him, of editing luxury books of pornographic content. This anecdote serves us to find out who this editor was, how much truth there was in the «accusation» and how the censored editor took the fact of being exposed to public shame. The correspondence between the priest and the editor, facilitated by a common friend, helps us analyze the arguments of both parties. We can grasp how the vast frame that embraces love literature to clearly pornographic works was perceived, both from the most conservative moral to a moderate free-thinking perspective.

  13. Norman Berliinis Einsteini jalajälgedes / Kristina Norman ; interv. Andreas Trossek

    Index Scriptorium Estoniae

    Norman, Kristina, 1979-

    2008-01-01

    5. IV-15. VI toimuva Berliini kaasaegse kunsti bienaali "When things cast no shadows / Kui asjad ei heida varju" (kuraatorid Adam Szymczyk ja Elena Filipovic) öise biennaaliprogrammi "Minu ööd on ilusamad kui teie päevad" raames on 25. V Archenholdi observatooriumis Kristina Normani diafilmi "The Field of Genius / Geniaalsuse väli" (2003) esitlus koos füüsiku ja astrobioloogi Paul Daviese loenguga. K. Norman meiliintervjuus oma diafilmist

  14. Uuenduslik Põhjamaa disain tuleb kandikul koju kätte / Eha Vain ; intervjueerinud Andreas Sepp

    Index Scriptorium Estoniae

    Vain, Eha

    2011-01-01

    2.-29. maini kestvast Põhjamaade disaini kuust Nordic Look, Põhjamaade moe- ja ehtedisaini näitusmüügist (14 kaubamärki) Tallinnas Hopneri majas, loomemajanduse rollist Põhjamaade koostöö arendamisel jm. Samas rootsi moekunstnikust Camilla Welltonist, Nordic Looki ürituste kava

  15. Lambad on söönud ja hundid on terved / Andreas W

    Index Scriptorium Estoniae

    Andreas W, pseud., 1969-

    1998-01-01

    Andrus Joonase näitus Tartus OBU galeriis. Tema pornograafiliste tööde (paljundatud pornograafilistele fotodele on kleebitud kunstniku pea foto) eemaldamisest eesti näitustelt, mis on tegelikult parim reklaam A. Joonase loomingule

  16. Sesoonseid märkmeid metakriitikast = Seasonal notes on metacriticism / Andreas Trossek

    Index Scriptorium Estoniae

    Trossek, Andreas, 1980-

    2015-01-01

    Sissejuhatus käesoleva Kunst.ee numbri faksiimile rubriigile: kunstikriitika mõjust reaalsele kunstielule. Näited Kumu kunstimuuseumi 2015. a. neljast väljapanekust, mis on saanud alguse kunstiajakirjades ilmunud materjalidest

  17. The Fateful Rift: The San Andreas Fault in the Modern Mind.

    Science.gov (United States)

    Percy, Walker

    1990-01-01

    Claims that modern science is radically incoherent and that this incoherence lies within the practice of science. Details the work of the scientist and philosopher Charles Sanders Pierce, expounding on the difference between Rene Descartes' dualistic philosophy and Pierce's triadic view. Concludes with a brief description of the human existence.…

  18. Leading Estonian brands in the hands of foreign companies / Andreas Kaju

    Index Scriptorium Estoniae

    Kaju, Andreas

    2002-01-01

    Emori poolt 2002. aasta alguses läbi viidud uurimusest selgus, et Eesti top 10 kaubamärkide hulgas on Kalev ainus Eesti kapitalil põhineva ettevõtte kaubamärk. Tabel: Eesti ettevõtete ja kaubamärkide top 6. Lisa

  19. Tumeda animatsiooni surm Euroopas : Priit Pärna "Hotell E" / Andreas Trossek

    Index Scriptorium Estoniae

    Trossek, Andreas, 1980-

    2011-01-01

    Vaadeldakse, kuidas M. Gorbatšovi võimuletuleku aastail esilekerkinud sotsiaalkriitilisemate filmide trend Eesti animatsioonis kulmineerub ja ühtlasi lõpeb Priit Pärna joonisfilmiga "Hotell E" (1992) - filmis on kombineeritud endisele Ida-Euroopale iseloomulik sotsialismivastane võimukriitika igatseva ihaga alati virtuaalsena tajutud lääne suunas

  20. Kohtuvälised avaldused tõendina kriminaalkohtumenetluses / Andreas Kangur

    Index Scriptorium Estoniae

    Kangur, Andreas, 1978-

    2011-01-01

    Võistlevast menetlusest ja kuulduste keelamise reeglist kriminaalmenetluses. Eestis kehtiva kriminaalmenetluse seadustiku ja Anglo-Ameerika võistlevast kohtumenetlusest pärineva kuulduste keelamise reegli omavahelistest seostest

  1. Accounting Firm Management: What to Do When Andy Accountant Becomes Andrea Accountant

    Directory of Open Access Journals (Sweden)

    Susannah Taylor

    2013-07-01

    Full Text Available Laws are continuing to evolve with respect to discrimination against persons with gender identity issues in the workplace. The accounting profession can be especially conservative where issues surrounding gender are especially sensitive and complex. One of the more challenging scenarios for employers is facilitating the gender transition process. Effectively communicating with co-workers and clients about the change, modifying personnel documents at the appropriate time, and dealing with more mundane issues such as restroom usage and dress code represent the tip of the iceberg. Simply developing a policy and creating guidelines will not instantly create an environment where all employees are treated as equals, but ensuring that all employees are adjusting to the necessary changes can prevent losing valuable employees.

  2. Andrea Fleschenberg, Claudia Derichs: Handbuch Spitzenpolitikerinnen. Wiesbaden: VS Verlag für Sozialwissenschaften 2008

    Directory of Open Access Journals (Sweden)

    Christiane Lemke

    2009-07-01

    Full Text Available „Frauen an die Macht“ – diese schon vor Jahrzehnten erhobene Forderung ist heute immer noch aktuell. Die politische Partizipation von Frauen hat sich zwar deutlich verbessert, aber in Führungspositionen sind sie immer noch selten anzutreffen. Das anschauliche Handbuch führt für alle Erdteile detailliert aus, unter welchen sozioökonomischen, institutionellen und kulturellen Einflussfaktoren Frauen zu Staats- und/oder Regierungschefinnen werden. Zahlreiche Einzelbiographien beleuchten die persönlichen Hintergründe.“Women in positions of power” – This centuries-old demand is still pertinent today. Women’s participation in politics has admittedly gotten much better, but they are still rarely seen in positions of leadership. The descriptive handbook provides details for each continent, illustrating under which socioeconomic, institutional, and cultural influential factors women become heads of state or government. Numerous individual biographies illuminate the personal histories.

  3. Andrea Zanni, Collaboratory Digital Libraries for Humanities in the Italian context

    Directory of Open Access Journals (Sweden)

    Maria Chiara Pievatolo

    2011-07-01

    Full Text Available Archiviato su E-Lis, il testo si occupa del senso attuale e futuro dell’uso delle tecnologie informatiche nella ricerca umanistica, nell’interessante prospettiva dell’autore, matematico per formazione e segretario di Wikimedia Italia. Il web, secondo Tim Berners-Lee, non è stato inventato come un mezzo per scorrere delle pagine, ma come uno spazio di informazione per permettere a [...

  4. Vaata mulle näkku: mu nimi on Oleks Võinud Olla / Andreas Sepp

    Index Scriptorium Estoniae

    Sepp, Andreas

    2011-01-01

    Tallinna Fotokuu raames Kumu Kunstimuuseumis rahvusvaheline kaamerakunsti näitus "Teisele poole" 7.10.2011-08.01.2012, kuraator Adam Budak Osaleb 19 kunstnikku, neist tutvustatakse: John Baldessari (California), Sunah Choi (Korea), Haris Epaminonda (Küpros), Helena Almeida (Portugal), Elad Lassry (Iisrael), Alexandre Singh (Prantsusmaa)

  5. Fortnightly modulation of San Andreas tremor and low-frequency earthquakes

    Science.gov (United States)

    Van Der Elst, Nicholas; Delorey, Andrew; Shelly, David R.; Johnson, Paul

    2016-01-01

    Earth tides modulate tremor and low-frequency earthquakes (LFEs) on faults in the vicinity of the brittle−ductile (seismic−aseismic) transition. The response to the tidal stress carries otherwise inaccessible information about fault strength and rheology. Here, we analyze the LFE response to the fortnightly tide, which modulates the amplitude of the daily tidal stress over a 14-d cycle. LFE rate is highest during the waxing fortnightly tide, with LFEs most strongly promoted when the daily stress exceeds the previous peak stress by the widest margin. This pattern implies a threshold failure process, with slip initiated when stress exceeds the local fault strength. Variations in sensitivity to the fortnightly modulation may reflect the degree of stress concentration on LFE-producing brittle asperities embedded within an otherwise aseismic fault.

  6. Euroopal tuleb leida vastus Vene Monroe-doktriinile / Lennart Meri ; intervjueerinud Olaf Ihlan, Andreas Lorentz

    Index Scriptorium Estoniae

    Meri, Lennart, 1929-2006

    1993-01-01

    Eesti Vabariigi president L. Meri Baltikumist ja suurvene šovinismist. Intervjuu ajakirjale "Der Spiegel", nr. 44, 1. nov. 1993, lk. 200, 202-203, 206, pealkiri: "Dann wird Europa verbluten" : Estlands Präsident Lennart Meri über das Baltikum und den grossrussischen Chauvinismus. Ilmunud ka: Õhtuleht, 8. nov., lk. 5, pealkiri: "Siis voolab Euroopas veri" : Eesti president Lennart Meri Baltikumist ja suurvene šovinismist ; Rahva Hääl, 9. nov., lk., 3 ; Eesti Rada (Köln, 1993) nr. 6, lk. 3, pealkiri: President Lennart Meri intervjuu "Spiegelile" / refereerinud ja tsiteerinud J. P ; Eesti Päevaleht (Stockholm), 24. nov., lk. 2 : ill., pealkiri: President Lennart Meri : "Venemaa laiendab oma huvisfääri" ; Vaba Eestlane (Toronto), 9. dets., lk. 3, 11, pealkiri: "Euroopal tuleb leida vastus Vene - Monroe doktriinile" ; Meie Kodu, 15. dets., lk. 6, pealkiri: Eesti Vabariigi President Lennart Meri Baltikumist ja suurvene šovinismist

  7. Alfven, Hugo. Die drei Schwedischen Rhapsodien op. 19, 24 und 47 / Andreas Meyer

    Index Scriptorium Estoniae

    Meyer, Andreas

    1995-01-01

    Uuest heliplaadist "Alfven, Hugo. Die drei Schwedischen Rhapsodien op. 19, 24 und 47, En skärgardssägen op. 20, Suite aus Der Berkönig. Königliche Stockholmer Philharmoniker, Neeme Järvi". AD: 1987-1992. BIS?Disco-Center CD 725 (WD: 77'00")

  8. Neotectonics of the San Andreas fault system: Basin and range province juncture

    Science.gov (United States)

    Estes, J. E.; Crowell, J. C.

    1986-01-01

    Several new details regarding the surficial patterns of neotectonic activity of the Eastern Transverse Ranges and vicinity were discovered. Additionally a number of data display and analysis techniques were developed. These findings will be useful both in the continued development of neotectonic models for southern California and for the future application of remote sensing methodologies elsewhere.

  9. Evaluation of nine-frame enhanced multiband photography San Andreas fault zone, Carrizo Plain, California

    Science.gov (United States)

    Wallace, R. E.

    1969-01-01

    Nine-frame multiband aerial photography of a sample area 4500 feet on a side was processed to enhance spectral contrasts. The area concerned is in the Carrizo Plain, 45 miles west of Bakersfield, California, in sec. 29, T 31 S., R. 21 E., as shown on the Panorama Hills quadrangle topographic map published by the U. S. Geological Survey. The accompany illustrations include an index map showing the location of the Carrizo Plain area; a geologic map of the area based on field studies and examination of black and white aerial photographs; an enhanced multiband aerial photograph; an Aero Ektachrome photograph; black and white aerial photographs; and infrared image in the 8-13 micron band.

  10. Model heat flow and magnetotellurics for the San Andreas and oceanic transform faults

    International Nuclear Information System (INIS)

    Ricard, Y.; Froidevaux, C.; Hermance, J.F.

    1983-01-01

    Two-dimensional temperature structures are computed for a lithospheric shear zone in order to predict the geometry of the hot anomalous region caused by shear heating. The results are compatible with earlier one-dimensional models. The comparison with the heat flow data from California is quite satisfactory. It requires to take into account the geometrical constraints corresponding to the migration of the Mendocino triple point. This is obtained by solving the time dependent heat equation. The possibility to probe the existence of a sub-Moho hot window by magnetotelluric sounding is then examined. A drop in apparent resistivity by a factor 2 to 4 is predicted. However, the presence of conductive sedimentary basins at the surface may hide this effect in California. In this respect the ocean floor transform faults might offer a somewhat simpler site for field observations

  11. Keskaegne Gubbacka küla Vantaas = the medieval site of Gubbacka in Vantaa / Andreas Koivisto

    Index Scriptorium Estoniae

    Koivisto, Andreas

    2009-01-01

    Gubbacka külast (tänapäevane nimi) teame 2003. ja 2008. aastal toimunud väljakaevamiste põhjal. 2003. aastal toimunud väljakaevamised on senini kõige ulatuslikumad keskaegse küla uuringud Soomes

  12. [Jean-Daniel Strub. Der gerechte Friede. Spannungsfelder eines friedensethnischen Leibegriffs.] / Andreas Pawlas

    Index Scriptorium Estoniae

    Pawlas, Andreas

    2012-01-01

    Arvustus: Strub, Jean-Daniel. Der gerechte Friede. Spannungsfelder eines friedensethnischen Leibegriffs. (Forum Systematik. beiträge zur Dogmatik, Ethik und ökumenischen Theologie, hg von Johannes Brosseder, Johannes Fischer und Joachim Track, Band 36), Verlag W. Kohlhammer, Stuttgart 2010

  13. Toward Expanding Tremor Observations in the Northern San Andreas Fault System in the 1990s

    Science.gov (United States)

    Damiao, L. G.; Dreger, D. S.; Nadeau, R. M.; Taira, T.; Guilhem, A.; Luna, B.; Zhang, H.

    2015-12-01

    The connection between tremor activity and active fault processes continues to expand our understanding of deep fault zone properties and deformation, the tectonic process, and the relationship of tremor to the occurrence of larger earthquakes. Compared to tremors in subduction zones, known tremor signals in California are ~5 to ~10 smaller in amplitude and duration. These characteristics, in addition to scarce geographic coverage, lack of continuous data (e.g., before mid-2001 at Parkfield), and absence of instrumentation sensitive enough to monitor these events have stifled tremor detection. The continuous monitoring of these events over a relatively short time period in limited locations may lead to a parochial view of the tremor phenomena and its relationship to fault, tectonic, and earthquake processes. To help overcome this, we have embarked on a project to expand the geographic and temporal scope of tremor observation along the Northern SAF system using available continuous seismic recordings from a broad array of 100s of surface seismic stations from multiple seismic networks. Available data for most of these stations also extends back into the mid-1990s. Processing and analysis of tremor signal from this large and low signal-to-noise dataset requires a heavily automated, data-science type approach and specialized techniques for identifying and extracting reliable data. We report here on the automated, envelope based methodology we have developed. We finally compare our catalog results with pre-existing tremor catalogs in the Parkfield area.

  14. Akrobaatikaõpetaja lõi Draculateemalise tsirkuseetenduse / Alissa Šnaider ; intervjueerinud Andreas Sepp

    Index Scriptorium Estoniae

    Šnaider, Alissa, 1985-

    2011-01-01

    Kadriorus 5.-13. augustini kestva rahvusvahelise uue tsirkuse festivali "Tsirkusepuu" raames esietendub 12. augustil stuudio OMAtsirkuse "Dr. Acula". Intervjuu tsirkuseetenduse lavastanud akrobaatikaõpetaja ja koreograafi Alissa Šnaideriga

  15. The idea and the text - a note on transcultural historical text analysis / Andreas Önnerfors

    Index Scriptorium Estoniae

    Önnerfors Andreas, 1971-

    2003-01-01

    Vastavate kultuuriliste koodide kasutamise vajadusest erinevate transkulturaalsete tekstide tõlkimisel. Näitena on toodud kirjanduslikud tekstid ajaloolisest, nii Rootsi kui Saksa võimu alla kuulunud Pommeri maakonnast

  16. Elu võimalikkusest pärast surma / Dénes Farkas ; intervjueerinud Andreas Trossek

    Index Scriptorium Estoniae

    Farkas, Dénes, 1974-

    2010-01-01

    Budapestis sündinud ja kasvanud, Eesti Kunstiakadeemia lõpetanud ja praegu Ungari Instituudis galeristina töötav Dénes Farkas endast, kunsti ja kunstniku positsioonist, oma isikunäitusest "Let's play ehk Mäng on läbi", mis on avatud Tallinnas Hobusepea galeriis 6. septembrini 2010

  17. Andrea Corrado – Igor Mariottini, Cinema e autori sulle tracce delle migrazioni

    Directory of Open Access Journals (Sweden)

    Lorenzo Mari

    2016-06-01

    Full Text Available Nel dibattito pubblico così come, inevitabilmente, nel senso comune, l’interpretazione della storia post-unitaria italiana alla luce delle migrazioni – prima come flussi in uscita, poi sia in entrata che in uscita – ha innescato la costruzione di un preciso discorso retorico, alimentato da pubblicazioni come L’orda. Quando gli albanesi eravamo noi (2005 di Gian Antonio Stella.

  18. Verslag uit de jungle is ook jungle van papier : interview door Geertje Dekkers met Andreas Weber en Lambert Schomaker

    NARCIS (Netherlands)

    Weber, Andreas

    2017-01-01

    In de archieven van Naturalis in Leiden ligt een goudmijn te wachten op historici. Maar de 17 duizend pagina's aantekeningen van 19de-eeuwse wetenschappelijke avonturiers vormen een te grote kluif voor menselijke onderzoekers. Beeldherkenning moet uitkomst bieden.

  19. Calvatone (CR. Costa di Sant’Andrea - Area di proprietà provinciale. Un nuovo mosaico dal vicus di Bedriacum

    Directory of Open Access Journals (Sweden)

    Alberto Bacchetta

    2009-12-01

    Full Text Available The annual archaeological excavations – organized by the University of Milano – at the vicus of Calvatone-Bedriacum has brought to the identification of a great residential building. It is important the recent discovery of a triclinium characterized by a cocciopesto floor. The floor presented a black and white device in tessellating paving, furthermore the central part is adorned with a kantharos  enclosed by peltas (peltae and birds inside geometrical spaces.

  20. Võrdseid võimalusi ja õppimist soodustav koolijuhtimine ning koolide autonoomia / Pavlos Hatzopoulos, Andreas Kollias, Kathy Kikis-Papadakis

    Index Scriptorium Estoniae

    Hatzopoulos, Pavlos

    2015-01-01

    Artikkel käsitleb European Policy Network on School Leadershipi (EPNoSL) raames tehtud analüüse, keskendudes kooli autonoomia küsimustele Euroopas, osutades vajadusele hoida kooli autonoomia ja keskvõimu otsustusõigus mõistlikus tasakaalus

  1. "Rohgem ei tiija mina teile kirjuda." Kirjavormelid ning peresuhete kajastused Jakob Ploomi sõjakirjades / Andreas Kalkun

    Index Scriptorium Estoniae

    Kalkun, Andreas, 1977-

    2015-01-01

    Sõjaaegse kirjakultuuri levimisest Võrumaalt pärit nekrut Jakob Ploomi 26 isikliku kirja põhjal, millest näeb, mismoodi paistis Suur sõda rohujuuretasandilt ning seda, mismoodi talupojad jõudsid sõja poolt peale sunnitud vajadusest tingituna suulisest maailmast kirjakultuuri

  2. EFA juht: "Eesti peaks oma kino üle uhkust tundma" / Marion Döring ; intervjueerinud Andreas Sepp

    Index Scriptorium Estoniae

    Döring, Marion

    2010-01-01

    Euroopa Filmiakadeemia tegevdirektor Marion Döring Euroopa filmikunstist, huvist Euroopa filmide vastu, Baltimaade ja Eesti kinost, Eesti filmist "Püha Tõnu kiusamine", EFA gala ja PÖFF-i koostoimumisest, Tallinna kultuuripealinna aastast, EFA galast jm. Samas EFA filmiauhindadest, Eesti esindajad EFA-s, Eesti filmide edust Euroopas

  3. Andrea Capra, Platone e la storia. La fine di Protagora e lo statuto letterario dei dialoghi socratici

    Directory of Open Access Journals (Sweden)

    Maria Chiara Pievatolo

    2011-05-01

    Full Text Available Secondo alcune fonti antiche il sofista Protagora, ormai anziano, fu accusato, come Socrate, di empietà e trovò la morte lasciando Atene, forse per sfuggire al processo o forse perché bandito dalla città. Contro questa tradizione sembra militare la testimonianza di Platone, secondo la quale, almeno in apparenza, Protagora, a differenza di altri intellettuali, non si [...

  4. Andrea. Hermínio Martins, il principio vichiano del verum factum e l’era ciberscientifica

    Directory of Open Access Journals (Sweden)

    Mazzola, Andrea

    2015-08-01

    Full Text Available Hermínio Martins, Vico’s verum-factum principle and the cyber-scientific age. In the context of technological civilization agribusiness techniques, biotechnology, ICT, AI programs, robotics and nanotechnology bring into question the humanistic character of scientific knowledge. Vico’s verum-factum principle seems inadequate to describe the serendipity and the irreversible side effects of engineering and industrial technology. First technoscience, then cyberscience, transform the human epistemic adventure in a risk and uncertainty factor for the survival of the species. The knowledge-power equivalence adds artificial vulnerability to natural vulnerability. The progress of technological innovation takes on characteristics of autonomy, incomprehensibility and uncontrollability which are dismissing man from the status of master of its own historical destiny.

  5. Discussion of 'The Forward Search: Theory and Data Analysis' by Anthony C. Atkinson, Marco Riani, and Andrea Ceroli

    DEFF Research Database (Denmark)

    Johansen, Søren; Nielsen, Bent

    The Forward Search Algorithm is a statistical algorithm for obtaining robust estimators of regression coefficients in the presence of outliers. The algorithm selects a succession of subsets of observations from which the parameters are estimated. The present note shows how the theory of empirical...

  6. Discussion of The Forward Search: Theory and Data Analysis by Anthony C. Atkinson, Marco Riani, and Andrea Ceroli

    DEFF Research Database (Denmark)

    Johansen, Søren; Nielsen, Bent

    The Forward Search Algorithm is a statistical algorithm for obtaining robust estimators of regression coefficients in the presence of outliers. The algorithm selects a succession of subsets of observations from which the parameters are estimated. The present note shows how the theory of empirical...

  7. "edo jal̀qkina üts̀varòkaetus ma vaelda ..." : [luuletused] / Andreas Kalkun

    Index Scriptorium Estoniae

    Kalkun, Andreas, 1977-

    2002-01-01

    Sisu: "edo jal̀qkina üts̀varòkaetus ma vaelda ..." ; "tsirguq ku kiviq no satassõ taivast aràlaq ..." ; "vahtsõq silmäq pitsitä pääluu sisse ..." ; "tõppõ tõmmat haigõst ma haarõt jal̀ki ..." ; "arsatas njago sisse aigopiteh ..." ; "rühkeq yks jumalat pallõlda jaloh ..." ; "mu süä om no süüdläne täǹtäseq kuvvõ ..." ; "halvaq haavaq häitsese veiga silmih. Eluloolisi andmeid autori kohta lk. 379

  8. Mida teha, et kirikukäsiraamat meie kirikut ei lõhuks? / Thomas-Andreas Põder

    Index Scriptorium Estoniae

    Põder, Thomas-Andreas, 1976-

    2009-01-01

    Kirikukäsiraamatu esialgse redaktsiooni esitlus oli meie kirikuelus kahemõtteline sündmus: raamatu trükist ilmumine ja asjaosaliste tänamine oli rõõmustav, selle esitlemine lõpuleviidud tööna kurvastav

  9. ANALYSIS OF DEFORMATION PROCESSES IN THE LITHOSPHERE FROM GEODETIC MEASUREMENTS BASED ON THE EXAMPLE OF THE SAN ANDREAS FAULT

    Directory of Open Access Journals (Sweden)

    Yury V. Gabsatarov

    2012-01-01

    Full Text Available Analysis of data from permanent GPS observation stations located in tectonically active regions provides for direct observation of deformation processes of the earth's surface which result from elastic interaction of the lithospheric plates and also occur when accumulated stresses are released by seismic events and postseismic processes.This article describes the methodology of applying the regression analysis of time series of data from GPS-stations for identification of individual components of the stations’ displacements caused by the influence of various deformation processes. Modelling of the stations’ displacements caused only by deformations of the marginal zone, wherein the lithospheric plates interact, allows us to study variations of the steady-state deformation in the marginal zone.he proposed methodology is applied to studies of variations of fields of cumulative surface displacements, surface displacement velocity and maximum shear strain velocity which are determined from the GPS data recorded prior to the Parkfield earthquake of 28 September 2004 (Mw=6.0.Combined analysis of the variations of the above-mentioned fields shows that measurable anomalies of the elastic deformation of the transform fault’s edge took place prior to the seismic event of 28 September 2004, and such anomalies were coincident in space and time with the focal area of the future seismic event.

  10. Andreas Acrivos Dissertation Award: Onset of Dynamic Wetting Failure - The Mechanics of High-Speed Fluid Displacement

    Science.gov (United States)

    Vandre, Eric

    2014-11-01

    Dynamic wetting is crucial to processes where a liquid displaces another fluid along a solid surface, such as the deposition of a coating liquid onto a moving substrate. Dynamic wetting fails when process speed exceeds some critical value, leading to incomplete fluid displacement and transient phenomena that impact a variety of applications, such as microfluidic devices, oil-recovery systems, and splashing droplets. Liquid coating processes are particularly sensitive to wetting failure, which can induce air entrainment and other catastrophic coating defects. Despite the industrial incentives for careful control of wetting behavior, the hydrodynamic factors that influence the transition to wetting failure remain poorly understood from empirical and theoretical perspectives. This work investigates the fundamentals of wetting failure in a variety of systems that are relevant to industrial coating flows. A hydrodynamic model is developed where an advancing fluid displaces a receding fluid along a smooth, moving substrate. Numerical solutions predict the onset of wetting failure at a critical substrate speed, which coincides with a turning point in the steady-state solution path for a given set of system parameters. Flow-field analysis reveals a physical mechanism where wetting failure results when capillary forces can no longer support the pressure gradients necessary to steadily displace the receding fluid. Novel experimental systems are used to measure the substrate speeds and meniscus shapes associated with the onset of air entrainment during wetting failure. Using high-speed visualization techniques, air entrainment is identified by the elongation of triangular air films with system-dependent size. Air films become unstable to thickness perturbations and ultimately rupture, leading to the entrainment of air bubbles. Meniscus confinement in a narrow gap between the substrate and a stationary plate is shown to delay air entrainment to higher speeds for a variety of water/glycerol solutions. In addition, liquid pressurization (relative to ambient air) further postpones air entrainment when the meniscus is located near a sharp corner along the plate. Recorded critical speeds compare well to predictions from the model, supporting the hydrodynamic mechanism for the onset of wetting failure. Lastly, the industrial practice of curtain coating is investigated using the hydrodynamic model. Due to the complexity of this system, a new computational approach is developed combining a finite element method and lubrication theory in order to improve the efficiency of the numerical analysis. Results show that the onset of wetting failure varies strongly with the operating conditions of this system. In addition, stresses from the air flow dramatically affect the steady wetting behavior of curtain coating. Ultimately, these findings emphasize the important role of two-fluid displacement mechanics in high-speed wetting systems.

  11. Mart Saali ja Lüütsepa Jaani taevaskäigud. Protestantlikest ilmutustest, nende poeesiast ja motiivistikust / Andreas Kalkun

    Index Scriptorium Estoniae

    Kalkun, Andreas, 1977-

    2006-01-01

    Analüüsitakse kahe 18. sajandi lõpul sündinud ning vennastekogudusest inspireeritud usulise ärkamise ja nn taevaskäijate liikumisega seotud eesti mehe ilmutusi. Kirjeldatakse ka protestantlike voolude ja sektidega seotud ilmutustenägijate traditsiooni ning teatud aspekte kristlikus ilmutustenägemise loos üldse

  12. Cuerpo y subjetividad en narraciones de Andrea Maturana, Ana María del Río y Diamela Eltit

    Directory of Open Access Journals (Sweden)

    María Inés Lagos

    2016-03-01

    Full Text Available Este ensayo examina tres relatos de escritoras chilenas publicados entre 1986 y 1993 en los que las protagonistas aparecen representadas como mujeres enfermas. Esta forma de representación, que subraya la materialidad del cuerpo, sugiere una concepción de la subjetividad en la que cuerpo y mente no pueden concebirse separadamente. Al enfocarse en personajes femeninos que sufren de desórdenes relacionados con la dieta, bulimia y anorexia, y en una madre enferma y su hija que está por dar a luz, estas narraciones muestran diversos modos en que las protagonistas se relacionan con su medio social, especialmente en lo que se refiere a su posición como mujeres. Los tres textos ofrecen diferentes reacciones frente a las expectativas sociales en cuanto a los roles femeninos prescritos, y varios grados de resistencia frente esos modelos. This essay examines three stories by Chilean women writers published between 1983 and 1993, in which the protaginists appear in the condition of sick women. The form of representation, underscoring the materiality of the body suggests a view of subjectivity in which body and mind cannot be conceived as separate. In focusing on femenine characters suffering fron disorders related to diet, bulimia and anorexia, and also on a sick mother with a daughter who is about to give birth, these narratives show different ways for the protagonists to relate to their respective social milieu, specially in what affects their gender condition. The three texts offer different reations to social expectations deriving from established femenine roles with various degrees of resistance to those prescribed models.

  13. Evidence for Cyclic Brittle-Ductile Deformation from San Andreas Fault Observatory at Depth (SAFOD) Phase 3 Cores

    Science.gov (United States)

    White, J. C.; Kennedy, L.

    2010-12-01

    Microstructural development in core retrieved from SAFOD Phase 3 drilling has been examined in three locations utilizing light, scanning electron (SEM) and transmission electron microscopy (TEM): (1) within the Salinian Terrane near its contact with the presumed Great Valley sequence (Hole E-Run 1-Section 4 & 6); (2) proximal to the Southwest Deformation Zone (SDZ) with which are associated casing deformation and seismic aftershocks indicative of active faulting (Hole G-Run-1-Section 2 & Hole G-Run 2-Section 3); and (3) within the Central Deformation Zone (CDZ) in the centre of the damage zone identified in Phase 2 drilling (Hole G-Run 4-Section 2). The sampling locations translate to an across-strike distance from outside the damage zone to its centre of approximately 125 meters, and a change in current measured depth from 2610 m to 2685m. Common to all cores are: (1) a significant fractional volume (quartz and perthitic feldspar clasts that locally form slightly foliated cataclasite. The matrix is commonly chloritic with very fine-grained aggregates and zones of quartz and/or feldspar. Microbrecciation is ubiquitous. There are both fluid-corroded clasts, particularly of quartz, and globular infillings of calcite with sutured contacts. Quartz and feldspar grains are coated by chlorite. Amorphous silica and secondary Ti-Fe oxides occur within cataclasite. Foliated siltstone-shale cataclasites (G12, G23) at the edge of the damage zone close to the SDZ exhibit brecciation and cataclasis at different scales; deformation is episodic as there are distinct overprinting relationships. The fine-grained matrix exhibits a strong SPO of phyllosilicates and cryptocrystalline quartz (quartz is introduced as fine stringer veins that are progressively incorporated into the overall fabric. Similar thin calcite veins form parallel to the cataclastic foliation, suggestive of fault parallel hydraulic fracture. Coarser grained phyllosilicate zones develop C-S type fabrics with dextral displacement sense. Deformation bands can exhibit well-rounded clasts separated by thin foliae of a pressure solution foliation. Sheared siltstone/sandstone (G42) from within central portion of the damage zone approximately 7m across strike from the CDZ exhibit extensive evidence of fluid-rock interaction. Grains commonly have overgrowths, and there are well-developed pressure solution foliae. Quartz grains commonly ‘float’ in a calcite matrix. The fine-grained matrix itself has a strong foliation. The most unique feature is the occurrence of calcite veins at a high angle to the tectonic foliation. Collectively, microstructures indicate repeated cycles of cataclasis, with rapid strength recovery (interseismic?) by fluid-enhanced healing with significant aseismic strain accumulation.

  14. Naised peaksid maksma makse vähem ja mehed rohkem / Alberto Alesina, Andrea Ichino ; tõlk. Erik Aru

    Index Scriptorium Estoniae

    Alesina, Alberto

    2007-01-01

    Ettepanek on, et langetada naiste ja tõsta meeste tulumaksu, kuid vähem kui naiste oma alaneb. Naiste maksude alandamine on lihtsaim viis naiste tööhõive suurendamiseks. Autorid leiavad, et soopõhine maksustamine võiks pikema aja jooksul aidata muuta ka peresisest tööjaotust

  15. Surface deformation measured with interferometric synthetic aperture radar: Case studies of basin and range and Garlock-San Andreas fault

    Science.gov (United States)

    Greene, Fernando

    Interferometric Synthetic Aperture Radar (InSAR) and Global Positioning System (GPS) is widely used to detect ground deformation from varieties of geophysical origins. However, most studies lack the spatial and temporal resolutions to better characterize such observations. The purpose of this research is to use multi-track satellite radar imagery to generate time series to study and monitor vertical ground deformation over large regions such as the Nevada portion of the Basin and Range Province and the western end of the Mojave Desert. We developed an innovative method to remove horizontal movements from InSAR line-of-sight (LOS) observations using a GPS velocity field and subsequently combine the multi-track imagery resulting in one single high spatial resolution map of observed vertical crustal and surface movements. By implementing this technique we detect vertical deformation signals with short and intermediate wavelength signals associated to tectonic processes such as interseismic and postseismic deformation. In Central Nevada Seismic Belt we detect in three independent orbits a broad area of uplift that confirms results of previous studies that associate the origin of this signal to post-seimic deformation of the historic earthquakes at this region. In south-central Nevada we detect several valleys that show a gradual eastward tilt of the valley floors due to deep geodynamical processes. The valleys located at the eastern side of Ruby Mountains show a range decrease that could indicate uplift related to magma intrusion or post-seismic deformation due to older, unrecognized earthquakes. In the Big Bend segment in southern California we detect vertical uplift as expected by mechanical models of interseismic deformation. Additionaly all our velocity maps reveal small wavelength deformation signals of anthropogenic origin.

  16. Opositsioon jääb endale kindlaks / Ulis Guth

    Index Scriptorium Estoniae

    Guth, Ulis, 1964-

    2003-01-01

    Võru linnavolikogus opositsiooni kuuluvate Keskerakonna ja Rahvaliidu saadikute protestist Andres Visnapuu valimise vastu linnavolikogu esimeheks. Keskerakondlasest volikogu liikme Tõnu Antoni arvamusest

  17. 75 FR 54884 - Ocean Transportation Intermediary License Applicants

    Science.gov (United States)

    2010-09-09

    .... Officers: Eddy Y. Kuo, Secretary, (Qualifying Individual), John Picard, President. Application Type: QI... Individual), Milton Cursage, Vice President. Application Type: QI Change. Cortrans Logistics, LLC (NVO & OFF...

  18. Resting and reactive frontal brain electrical activity (EEG among a non-clinical sample of socially anxious adults: Does concurrent depressive mood matter?

    Directory of Open Access Journals (Sweden)

    Elliott A Beaton

    2008-03-01

    Full Text Available Elliott A Beaton1, Louis A Schmidt2, Andrea R Ashbaugh2,5, Diane L Santesso2, Martin M Antony1,3,4, Randi E McCabe1,31Department of Psychiatry and Behavioural Neurosciences, McMaster University, Hamilton, Ontario, Canada; 2Department of Psychology, Neuroscience and Behaviour, McMaster University, Hamilton, Ontario, Canada; 3Anxiety Treatment and Research Centre, St. Joseph’s Healthcare, Hamilton, Ontario, Canada; 4Department of Psychology, Ryerson University, Toronto, Ontario, Canada; 5Concordia University, Montreal, Quebec, CanadaAbstract: A number of studies have noted that the pattern of resting frontal brain electrical activity (EEG is related to individual differences in affective style in healthy infants, children, and adults and some clinical populations when symptoms are reduced or in remission. We measured self-reported trait shyness and sociability, concurrent depressive mood, and frontal brain electrical activity (EEG at rest and in anticipation of a speech task in a non-clinical sample of healthy young adults selected for high and low social anxiety. Although the patterns of resting and reactive frontal EEG asymmetry did not distinguish among individual differences in social anxiety, the pattern of resting frontal EEG asymmetry was related to trait shyness after controlling for concurrent depressive mood. Individuals who reported a higher degree of shyness were likely to exhibit greater relative right frontal EEG activity at rest. However, trait shyness was not related to frontal EEG asymmetry measured during the speech-preparation task, even after controlling for concurrent depressive mood. These findings replicate and extend prior work on resting frontal EEG asymmetry and individual differences in affective style in adults. Findings also highlight the importance of considering concurrent emotional states of participants when examining psychophysiological correlates of personality.Keywords: social anxiety, shyness, sociability

  19. Sadhana | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; Journals; Sadhana. ANTONY BENEDICT. Articles written in Sadhana. Volume 42 Issue 6 June 2017 pp 817-826. Deterministic oscillatory search: a new meta-heuristic optimization algorithm · N ARCHANA R VIDHYAPRIYA ANTONY BENEDICT KARTHIK CHANDRAN · More Details Abstract Fulltext PDF. The paper ...

  20. Pramana – Journal of Physics | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; Journals; Pramana – Journal of Physics. Antony Kuruvilla. Articles written in Pramana – Journal of Physics. Volume 82 Issue 1 January 2014 pp 143-146 Contributed Papers. Erbium–ytterbium fibre laser emitting more than 13W of power in 1.55 m region · Srikanth Gurram Antony Kuruvilla Rajpal Singh Blacius ...

  1. Nous horitzons. La impugnació de la Sentència: vies, òrgans i procediments - Nuevos horizontes. La impugnación de la Sentencia: vías, órganos y procedimientos

    Directory of Open Access Journals (Sweden)

    Argelia Queralt

    2010-07-01

    Full Text Available La impugnació de la Sentència: possibilitats d’accés al Tribunal Europeu de Drets Humans (469-472Antoni Bayona RocamoraLa impugnación de la Sentencia: posibilidades de acceso al Tribunal Europeo de Derechos Humanos (475-478Antoni Bayona Rocamora

  2. Die Evagriusübersetzung der Vita Antonii : Rezeption - Überlieferung - Edition : Unter besonderer Berücksichtigung der Vitas Patrum-Tradition

    NARCIS (Netherlands)

    Bertrand, P.H.E.

    2006-01-01

    The Life of Antony, translated by Evagrius of Antioch: Reception, Manuscript Tradition, Edition. With special emphasis on Vitas Patrum Tradition The Life of Antony is the first and one of the most famous saints’ lives that has ever been written. Shortly after the death of the desertfather

  3. Pressing On

    Science.gov (United States)

    Hoff, David J.

    2006-01-01

    Louisiana state schools Superintendent Cecil J. Picard is working to rebuild the New Orleans school system while battling Lou Gehrig's disease. Cecil J. Picard walks confidently and purposefully to his seat, using a cane to support his weakening right leg. The widow's peak and his graying hair are signs that he's lived 68 years, and the cane…

  4. Diagrams for certain quotients of PSL(2,Z[i])

    Indian Academy of Sciences (India)

    Abstract. Actions of the Picard group PSL(2, Z[i]) on PL(Fp), where p ≡ 1(mod 4), are investigated through diagrams. Each diagram is composed of fragments of three types. A technique is developed to count the number of fragments which frequently occur in the diagrams for the action of the Picard group on PL(Fp).

  5. Alternating groups as a quotient of

    Indian Academy of Sciences (India)

    Qaiser Mushtaq

    2018-03-19

    Mar 19, 2018 ... Abstract. In this study, we developed an algorithm to find the homomorphisms of the Picard group PSL(2, Z[i]) into a finite group G. This algorithm is helpful to find a homomorphism (if it is possible) of the Picard group to any finite group of order less than. 15! because of the limitations of the GAP and ...

  6. Den lysende cellostemme

    DEFF Research Database (Denmark)

    Mortensen, Tore

    2010-01-01

    Schumann, Boccherini Aalborg Symfoniorkester dir.: Benjamin Bayl solist: Andreas Brantelid Aalborghallen......Schumann, Boccherini Aalborg Symfoniorkester dir.: Benjamin Bayl solist: Andreas Brantelid Aalborghallen...

  7. Friedrich Konrad Griepenkerl (1782-1849), Braunschweigi Collegium Carolinumi professor ja Braunschweigi Lauluakadeemia esimene direktor / Andreas Waczkat ; tõlkinud Anu Sõõro

    Index Scriptorium Estoniae

    Waczkat, Andreas, 1964-

    2009-01-01

    Friedrich Konrad Griepenkerl töötas 1821. aastast alates Collegium Carolinumis filosoofia ja esteetika professorina. Ta oli esimene professor, kelle professionaalne karjäär hõlmas muusikat. Ehkki Griepenkerl ei olnud akadeemiline muusikaõpetaja, oli tema muusikaline tegevus Braunschweigis professorikohaga tihedalt seotud, kuna ta jõudis avalike loengute kaudu laia kunsti- ja muusikahuvilise publikuni. Peale selle asutas ta lauluringi, millest sai hiljem Braunschweigi lauluakadeemia.

  8. Die Entwicklung des europäischen Zivilprozessrechts im Bereich der EuGVVO im Jahr 2016 / Dominik Schnichels, Katja Lenzing, Andreas Stein

    Index Scriptorium Estoniae

    Schnichels, Dominik

    2017-01-01

    EL määruse kohtualluvuse ning kohtuotsuste tunnustamise ja täitmise kohta tsiviil- ja kaubandusasjades arengutest aastal 2016 ja seotud kohtulahenditest nn Brüsseli I määruse tõlgendamise kohta

  9. Rezension zu: Hildegard Maria Nickel, Andreas Heilmann, Hasko Hüning, Max Lill: Geschlechterpolitik in Krisenzeiten. Eine Fallstudie im Bankensektor. Berlin: edition sigma 2015.

    Directory of Open Access Journals (Sweden)

    Annett Schulze

    2015-12-01

    Full Text Available Am Beispiel der LandesBank Berlin zeigen die Autor/-innen konkrete Auswirkungen der Bankenkrise auf in Unternehmen agierende betriebliche Akteur/-innen. Inwiefern diese eigene Handlungsspielräume entwickeln (können und welche Kontinuitäten betriebliche Vergeschlechtlichungsprozesse aufweisen, belegt die Studie eindrücklich. Der mit dem Wandel von Erwerbsarbeit verknüpfte Eigensinn zeigt sich in den Vorstellungen von Zuständigkeiten der weiblichen Angestellten und in den veränderten Antworten auf Work-Life-Balance-Fragen ─ bei jungen männlichen Angestellten und bei älteren Führungskräften, die jungen Vätern einen Mentalitätswandel unterstellen. So könnten sich neue Kollektivierungen jenseits von Geschlecht bilden, insofern an geteilte Interessen in Krisensituationen angeknüpft werden würde.

  10. Landing Gear Stroke and Load Predictions for the AV-8B Aircraft and Three Ski Jump Ramp Profiles for the Italian Carrier Andrea Doria

    National Research Council Canada - National Science Library

    Imhof, Gregory

    2004-01-01

    .... The effort was funded through a 90-day contract to use the NAVAIR AV-8B simulation to assess the landing gear stroke and load characteristics of the AV-8B aircraft with three potential ski jump...

  11. Fotokuu näituse kuraator Adam Budak on ühendanud filmi, arhitektuuri ja filosoofia / Adam Budak ; intervjueerinud Andreas Sepp

    Index Scriptorium Estoniae

    Budak, Adam, 1966-

    2011-01-01

    Kumu Kunstimuuseumis 8. jaanuarini 2012 avatud rahvusvahelise kaamerakunsti näituse "Teisele poole" kuraator kaasaegse kunsti kuraatori tööst, näituse "Teisele poole" kureerimise lähtekohtadest, varasematest kokkupuudetest Tallinnaga, endast, kolimisest Ameerikasse jm.

  12. Reprising John Dewey: A Review of Andreas Demetriou, George Spanoudis & Antigoni Mouyi's "Educating the Developing Mind--Towards an Overarching Paradigm"

    Science.gov (United States)

    Olson, David R.

    2012-01-01

    As a summary of current advances in developmental psychology, the above article makes some useful contributions. As a contribution to educational policy and practice, it is limited if not a failure for two reasons. It fails to come to grips with the real demands of living classrooms, and second, it fails to grasp the actual subjective lives of the…

  13. Workshop on The Functional Analysis of Quantum Information Theory : a Collection of Notes Based on Lectures by Gilles Pisier, K. R. Parthasarathy, Vern Paulsen and Andreas Winter

    CERN Document Server

    Gupta, Ved Prakash; Sunder, V S

    2015-01-01

    This book provides readers with a concise introduction to current studies on operator-algebras and their generalizations, operator spaces and operator systems, with a special focus on their application in quantum information science. This basic framework for the mathematical formulation of quantum information can be traced back to the mathematical work of John von Neumann, one of the pioneers of operator algebras, which forms the underpinning of most current mathematical treatments of the quantum theory, besides being one of the most dynamic areas of twentieth century functional analysis. Today, von Neumann’s foresight finds expression in the rapidly growing field of quantum information theory. These notes gather the content of lectures given by a very distinguished group of mathematicians and quantum information theorists, held at the IMSc in Chennai some years ago, and great care has been taken to present the material as a primer on the subject matter. Starting from the basic definitions of operator space...

  14. Elisabeth Tüüringist (1207-1231) : läbipekstud ingel / Friedrich Prinz ; saksa keelest tõlk. Andreas Ardus

    Index Scriptorium Estoniae

    Prinz, Friedrich

    2006-01-01

    Tüüringi, Hesseni, Saksa ordu, heategevusühingute, leskede, kerjuste ning süütult kannatajate kaitsepühaku Ungari Elisabethi elust ja tegevusest, tema seostest jutlustaja ja askeedi Marburgi Konradiga (1180/1200-1233)

  15. Bernard Clairvaux'st (1090-1153) : võitleja, organisaator, müstik / Friedrich Prinz ; saksa keelest tõlk. Andreas Ardus

    Index Scriptorium Estoniae

    Prinz, Friedrich

    2006-01-01

    Keskaja prantsuse pühaku Bernard Clairvaux' elust, tegevusest ja teoloogiast. Tema rollist tsistertslaste uute rangema distsipliiniga kloostrite rajamisel, ristisõjapropagandas ning Euroopat hõlmanud kirikulõhes

  16. Eraparklates osutatava parkimisteenuse õiguslikud alused ja probleemid : [magistritöö] / Martin Simmermann ; Tartu Ülikool, õigusteaduskond ; juhendaja: Andreas Kangur

    Index Scriptorium Estoniae

    Simmermann, Martin

    2010-01-01

    Eraparklates osutatava parkimisteenuse praktikast Eestis, eraparklate parkimiskorralduse, parkimislepingute ja leppetrahvide õiguslikest alustest, vajadusest ja ettepanekutest kehtiva regulatsiooni muutmiseks

  17. Teaduskonverents ühest epohhist Eesti teoloogia ajaloos : "Elmar Salumaa 100" Tartu Ülikoolis ja EELK Usuteaduse Instituudis 09.-10.05.2008 / Thomas-Andreas Põder

    Index Scriptorium Estoniae

    Põder, Thomas-Andreas, 1976-

    2008-01-01

    Ülevaade Tartu Ülikoolis ja Tallinnas EELK Usuteaduse Instituudis 9.-10.05 2008 toimunud teoloog Elmar Salumaa 100. sünnipäeva tähistamisele pühendatud konverentsi ettekannetest ja diskussioonidest

  18. Dareios I kuninglikust titulatuurist Behistuni raidkirja näitel ning võimalikud Mesopotaamia mõjutused selles / Andreas Johandi, Vladimir Sazonov

    Index Scriptorium Estoniae

    Johandi, Andreas, 1983-

    2016-01-01

    Dareios I tiitlitest "kuningas", "suurkuningas", "Pärsia kuningas", "kuningate kuningas", "Babüloni kuningas", "kõikide maade kuningas". Dareios I tiitlid erinesid Kyros II ja Kambyses II tiitlitest, samas pärines nende kõigi ametlik titulatuur enamasti Mesopotaamiast

  19. A study of tectonic activity in the Basin-Range Province and on the San Andreas Fault. No. 1: Kinematics of Basin-Range intraplate extension

    Science.gov (United States)

    Eddington, P. K.; Smith, R. B.; Renggli, C.

    1986-01-01

    Strain rates assessed from brittle fracture and total brittle-ductile deformation measured from geodetic data were compared to estimates of paleo-strain from Quaternary geology for the intraplate Great Basin part of the Basin-Range, western United States. These data provide an assessment of the kinematics and mode of lithospheric extension that the western U.S. Cordillera has experienced from the past few million years to the present. Strain and deformation rates were determined by the seismic moment tensor method using historic seismicity and fault plane solutions for sub-regions of homogeneous strain. Contemporary deformation in the Great Basin occurs principally along the active seismic zones. The integrated opening rate across the entire Great Basin is accommodated by E-E extension at 8 to 10 mm/a in the north that diminishes to NW-SE extension of 3.5 mm/a in the south. Zones of maximum lithospheric extension correspond to belts of thin crust, high heat flow, and Quaternary basaltic volcanism, suggesting that these parameters are related through mechanism of extension such as a stress relaxation, allowing bouyant uplift and ascension of magmas.

  20. Satellite Geodetic Constraints On Earthquake Processes: Implications of the 1999 Turkish Earthquakes for Fault Mechanics and Seismic Hazards on the San Andreas Fault

    Science.gov (United States)

    Reilinger, Robert

    2005-01-01

    Our principal activities during the initial phase of this project include: 1) Continued monitoring of postseismic deformation for the 1999 Izmit and Duzce, Turkey earthquakes from repeated GPS survey measurements and expansion of the Marmara Continuous GPS Network (MAGNET), 2) Establishing three North Anatolian fault crossing profiles (10 sitedprofile) at locations that experienced major surface-fault earthquakes at different times in the past to examine strain accumulation as a function of time in the earthquake cycle (2004), 3) Repeat observations of selected sites in the fault-crossing profiles (2005), 4) Repeat surveys of the Marmara GPS network to continue to monitor postseismic deformation, 5) Refining block models for the Marmara Sea seismic gap area to better understand earthquake hazards in the Greater Istanbul area, 6) Continuing development of models for afterslip and distributed viscoelastic deformation for the earthquake cycle. We are keeping close contact with MIT colleagues (Brad Hager, and Eric Hetland) who are developing models for S. California and for the earthquake cycle in general (Hetland, 2006). In addition, our Turkish partners at the Marmara Research Center have undertaken repeat, micro-gravity measurements at the MAGNET sites and have provided us estimates of gravity change during the period 2003 - 2005.

  1. Sibelius, J. Kullervo op.7, Nationaler estnischer Männerchor, Stockholms Filharmoniska Orkester, Paavo Järvi / Andreas K. W. Meyer

    Index Scriptorium Estoniae

    Meyer, Andreas K. W.

    1998-01-01

    Uuest heliplaadist "Sibelius, J. Kullervo op.7. Randi Stene (Mezzosopran), Peter Mattei (Bariton), Nationaler estnischer Männerchor, Stockholms Filharmoniska Orkester, Paavo Järvi". Virgin/EMI 5 45292 2 (78'34") DDD Aufnahme: 1997.

  2. 3 küsimust / interv. Elina Kononenko

    Index Scriptorium Estoniae

    2005-01-01

    Andres Kõivu (Isamaaliit), Ivari Padari (Sotsiaaldemokraatliku Erakond), Ülle Puustusmaa (Res Publica), Tõnu Antoni (Keskerakond), Ivi Eenmaa (Reformierakond), Toivo Teekeli (Kristliku Rahvapartei) ja Arno Silla (Rahvaliit) linnapeakandidaatide ja parteide esindajate vastused kohalike valimiste teemal

  3. Mõrvaprotsessi süüalune üritas uurijaid kohtusse anda / Villu Päärt

    Index Scriptorium Estoniae

    Päärt, Villu, 1972-

    2003-01-01

    Tartu endise abilinnapea Aleks Lenzneri poja Antoni tapmises kohtu alla antud Valeri Tsakker saatis kaitsepolitseisse avalduse, väites, et keskkriminaalpolitseinikud avaldasid talle psühholoogilist survet

  4. Polish Defense Policy in the Context of National Security Strategy

    Science.gov (United States)

    2006-06-01

    Antoni Podolski, Polska Strategia Bezpieczenstwa jako Praktyczna Implementacja Europejskiej Strategii Bezpeczenstwa –miedzy teoria a praktyka (Warszawa...Implementacja Europejskiej Strategii Bezpeczenstwa –miedzy teoria a praktyka (Warszawa: Center for International Relations, 2005), 13. Polish Ministry

  5. Fellowship | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Home; Fellowship. Fellow Profile. Elected: 1979 Section: Plant Sciences. Davis, Dr Trupapur Antony Ph.D. (ISI). Date of birth: 9 February 1923. Date of death: 10 November 1989. Specialization: Plant Physiology. YouTube; Twitter; Facebook; Blog ...

  6. Beevor receives Estonian State decoration

    Index Scriptorium Estoniae

    2008-01-01

    Eesti suursaadik Suurbritannias Margus Laidre andis 2. juunil 2008 Londonis Suurbritannia ajaloolasele Antony James Beevorile üle talle president Toomas Hendrik Ilvese poolt annetatud Maarjamaa Risti III klassi teenetemärgi

  7. 47 Mangroves

    Indian Academy of Sciences (India)

    RESONANCE | January 2011. Resonance journal of science education. January 2011 Volume 16 Number 1. SERIES ARTICLES. 6. Dawn of Science. The Printed Page ... Replica of Leeuwenhoek's microscope. (Courtesy: Wikimedia). Antony van Leeuwenhoek. (1632–1723). ( Illustration: Subhankar Biswas ). Front Cover.

  8. Fighting Dark Networks: Using Social Network Analysis to Implement the Special Operations Targeting Process for Direct and Indirect Approaches

    Science.gov (United States)

    2013-03-01

    key player problem of network intervention targeting, are described in pieces by Ballester , Calvo-Armengol and Zenou.90 As a military practitioners go...Properties of Eigenvector Centrality,” Social Networks 29, no. 4 (2007), 555–564. 90 Coralio Ballester , Antoni Calvo-Armengol, and Yves Zenou...Sociological Review 58 (1993): 837–860. Ballester , Coralio, Antoni Calvo-Armengol, and Yves Zenou. “Who’s Who in Crime Networks. Wanted: The Key Player

  9. Facies pattern of the middle Permian Barren Measures Formation ...

    Indian Academy of Sciences (India)

    offshore facies changes are suggestive of lacustrine environment. (Picard and High 1972). • In general, very low fossil content (as compared to the Barakar and the Raniganj Formations) characterises the Barren Measures Formation.

  10. Diagrams for certain quotients of PSL (2, Z [i])

    Indian Academy of Sciences (India)

    2016-08-26

    Fp). The conditions of existence of fixed points of the transformations are evolved. It is further proved that the action of the Picard group on PL(Fp) is transitive. A code in Mathematica is developed to perform the calculation.

  11. Iterative Methods for Solving Nonlinear Parabolic Problem in Pension Saving Management

    Science.gov (United States)

    Koleva, M. N.

    2011-11-01

    In this work we consider a nonlinear parabolic equation, obtained from Riccati like transformation of the Hamilton-Jacobi-Bellman equation, arising in pension saving management. We discuss two numerical iterative methods for solving the model problem—fully implicit Picard method and mixed Picard-Newton method, which preserves the parabolic characteristics of the differential problem. Numerical experiments for comparison the accuracy and effectiveness of the algorithms are discussed. Finally, observations are given.

  12. Proceedings – Mathematical Sciences | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    Stability of Picard Bundle Over Moduli Space of Stable Vector Bundles of Rank Two Over a Curve · Indranil Biswas Tomás L Gómez · More Details Abstract Fulltext PDF. Answering a question of [BV] it is proved that the Picard bundle on the moduli space of stable vector bundles of rank two, on a Riemann surface of genus at ...

  13. Enhancing the health of women living with HIV: the SMART/EST Women's Project

    Directory of Open Access Journals (Sweden)

    Stephen M Weiss

    2011-02-01

    Full Text Available Stephen M Weiss1, Jonathan N Tobin2, Michael Antoni1, Gail Ironson1, Mary Ishii1, Anita Vaughn2, Andrea Cassells2, Deborah Jones1, Neil Schneiderman1, Elizabeth Brondolo3, Arthur LaPerriere1, Maria Lopez1, Olga Villar-Loubet1, Joanne Camille2, Mahendra Kumar1, J Bryan Page1, SMART/EST Women's Project Team*1University of Miami, Miami, FL, USA; 2Clinical Directors Network, New York, NY, USA; 3St Johns University, Queens, NY, USA; *The SMART/EST Womens' Project Team: DeVieux J, Jean-Gilles M, Gousse Y, Alexander K, Bustamonte V, Lopez E, Casani J, Stanley H, Asthana D, Van Splunteren F, Goldstein A, Nasajon R, Wiesner Y, Zukerman M, Segal-Isaacson CJ, Romanowsky A, Masheb R, Coma C, Ubiera M, D'Andrea SM, Ittai N.Abstract: The principal objective of these multisite studies (Florida, New York, New Jersey: epicenters for human immunodeficiency virus [HIV] among women was to develop and implement effective combinations of behavioral interventions to optimize the health status of the most neglected and understudied population affected by the acquired immunodeficiency syndrome (AIDS epidemic in the United States: poor women of color living with HIV. The two studies enrolled nearly 900 women randomly assigned to “high intensity” (cognitive–behavioral stress management training combined with expressive–supportive therapy [CBSM]+ group or “low intensity” (individual psychoeducational program treatment conditions over a period of 9 years. The initial study of the stress management and relaxation training/expressive–supportive therapy (SMART/EST Women's Project (SWP I focused on reducing depression and anxiety, as well as improving self-efficacy and overall quality of life for women with case-defined AIDS. Findings from this study demonstrated the utility of CBSM+ in reducing distress (depression, anxiety and denial, while improving social support, self-efficacy, coping skills, and quality of life. The second study (SWP II, which included all

  14. The Social Life of Prayer

    DEFF Research Database (Denmark)

    Special issue with contributions by Joe Webster, Naomi Haynes, Bruno Reinhardt, Simion Pop and Andreas Bandak......Special issue with contributions by Joe Webster, Naomi Haynes, Bruno Reinhardt, Simion Pop and Andreas Bandak...

  15. Understanding Identity and Organizations

    DEFF Research Database (Denmark)

    Christensen, Lars Thøger

    2013-01-01

    The article reviews the book "Understanding Identity and Organizations," by Kate Kenny, Andrea Whitle, and Hugh Wilmott.......The article reviews the book "Understanding Identity and Organizations," by Kate Kenny, Andrea Whitle, and Hugh Wilmott....

  16. Pop / Tõnu Kaalep

    Index Scriptorium Estoniae

    Kaalep, Tõnu, 1966-

    2002-01-01

    Heliplaatidest Roger Waters "The Flickering Flame: The Solo Years Vol 1". Jah Wobble's Solaris "Live in Concert". Andreas Moras / Igor Cavalera / Andreas Kisser "No Coracao Des Deuses - Soundtrack". Ed Case "Ed's Guest List"

  17. Lepingulise esindaja õigus ütluste andmisest keelduda tsiviilkohtumenetluses ning selle õiguse seos konfidentsiaalsuskohustusega : [magistritöö] / Jako Laanemägi ; Tartu Ülikool, õigusteaduskond ; juhendaja: Andreas Kangur

    Index Scriptorium Estoniae

    Laanemägi, Jako

    2010-01-01

    Ütluste andmisest tsiviilprotsessis, advokaadi osast, õigusnõustaja rollist, prokuristist e. menetlusosalise lepingulisest esindajast kohtumenetluses, notari osast, muu isiku rollist (nt. patendivolinik)

  18. Alkoholijoobe olemus ja tuvastamine väärteomenetluses Eesti ja USA näitel : [bakalaureusetöö] / Sten Senkel ; Tartu Ülikool, õigusteaduskond ; juhendaja: Andreas Kangur

    Index Scriptorium Estoniae

    Senkel, Sten

    2006-01-01

    Joobes juhtimise karistamise alused, vajalikkus ja eesmärk, joobeseisundi tuvastamine - süüteomenetlus (karistusseadustiku paragrahv 424) või haldusmenetlus (liiklusseaduse paragrahv 74), joobeseisundi olemus, määratlemine Eesti ja USA näitel, menetlusaluse isiku õiguste kaitse

  19. Bielli, Andrea (2012. La introducción de los antidepresivos en Uruguay (1950-2000: transformaciones de los saberes psicológicos. Montevideo: Universidad de la República, 412 p.

    Directory of Open Access Journals (Sweden)

    Juan Enrique Fernández Romar

    2013-05-01

    Full Text Available En el presente libro se desarrollan y analizan las transformaciones teóricas y discursivas en el mundo psi uruguayo sobre la depresión y sus abordajes terapéuticos desde la introducción de los primeros antidepresivos en los años 50´ hasta el año 2000. Medio siglo de discusiones y controversias en un entorno científico y tecnológico dependiente de teorías, discursos y técnicas producidas en las grandes usinas académicas y farmacológicas de los países centrales. La aparición de los primeros antidepresivos a mediados del siglo XX desencadenó un complejo debate polifónico sobre la eventual eficacia, el alcance terapéutico de estos fármacos y también sobre la naturaleza de la depresión y sus posibilidades de tratamiento. Este magnífico ensayo aborda en forma esclarecedora como han ido variando y confrontándose entre sí los diferentes discursos médicos y psicológicos uruguayos sobre la depresión y sus abordajes terapéuticos.

  20. Review: Reiner Keller, Andreas Hirseland, Werner Schneider & Willy Viehöver (Eds. (2006. Handbuch Sozialwissenschaftliche Diskursanalyse. Band I: Theorien und Methoden [Handbook on Discourse Analysis in Social Sciences. Theories and Methods

    Directory of Open Access Journals (Sweden)

    Steffen Großkopf

    2008-01-01

    Full Text Available The handbook gives a general overview of the established—but increasingly complex—theoretical and methodological practice of discourse analysis. The attempt is made to systematize the diversity of discourse analysis, with its different historical roots and fields of research in the social sciences, even though the focus is mainly on FOUCAULT's approach. Thus, the handbook has to be understood as an important step towards a insertion of discourse analysis into social science. Although there are unavoidable contradictions between the articles—almost because of the open theoretical foundations—the handbook characterizes, as a whole, discourse analysis as a heterogeneous strategy of research rather than as a stringent method. With this approach, it can be a helpful guide for the reader’s own research projects. However, if one is looking for a precise method, the investment of time in discourse analysis could be wasted. URN: urn:nbn:de:0114-fqs0801143

  1. Väikeste süütegude menetlus: põhiõigused versus kokkuhoid : [bakalaureusetöö] / Andreas Kangur ; Tartu Ülikool, õigusteaduskond ; juhendaja: Jaan Ginter

    Index Scriptorium Estoniae

    Kangur, Andreas, 1978-

    2001-01-01

    Mis on väike süütegu - USA lähenemine, Eesti senine lähenemine, uus karistusseadustik, põhiõigused Euroopa Inimõiguste Konventsiooni, Eesti põhiseaduse ja USA konstitutsiooni järgi, süüteomenetluse eesmärk, menetluse ökonoomsemaks muutmine

  2. Detecting Significant Stress Drop Variations in Large Micro-Earthquake Datasets: A Comparison Between a Convergent Step-Over in the San Andreas Fault and the Ventura Thrust Fault System, Southern California

    Science.gov (United States)

    Goebel, T. H. W.; Hauksson, E.; Plesch, A.; Shaw, J. H.

    2017-06-01

    A key parameter in engineering seismology and earthquake physics is seismic stress drop, which describes the relative amount of high-frequency energy radiation at the source. To identify regions with potentially significant stress drop variations, we perform a comparative analysis of source parameters in the greater San Gorgonio Pass (SGP) and Ventura basin (VB) in southern California. The identification of physical stress drop variations is complicated by large data scatter as a result of attenuation, limited recording bandwidth and imprecise modeling assumptions. In light of the inherently high uncertainties in single stress drop measurements, we follow the strategy of stacking large numbers of source spectra thereby enhancing the resolution of our method. We analyze more than 6000 high-quality waveforms between 2000 and 2014, and compute seismic moments, corner frequencies and stress drops. Significant variations in stress drop estimates exist within the SGP area. Moreover, the SGP also exhibits systematically higher stress drops than VB and shows more scatter. We demonstrate that the higher scatter in SGP is not a generic artifact of our method but an expression of differences in underlying source processes. Our results suggest that higher differential stresses, which can be deduced from larger focal depth and more thrust faulting, may only be of secondary importance for stress drop variations. Instead, the general degree of stress field heterogeneity and strain localization may influence stress drops more strongly, so that more localized faulting and homogeneous stress fields favor lower stress drops. In addition, higher loading rates, for example, across the VB potentially result in stress drop reduction whereas slow loading rates on local fault segments within the SGP region result in anomalously high stress drop estimates. Our results show that crustal and fault properties systematically influence earthquake stress drops of small and large events and should be considered for seismic hazard assessment.

  3. GENDER PERSPECTIVE IN THE NOVELS PADANG BULAN AND CINTA DI DALAM GELAS BY ANDREA HIRATA: A Study of Structure and Feminism Literary Criticism and Its Relevance as the Literature Reading Materials for High Schools

    Directory of Open Access Journals (Sweden)

    Tanita Liasna

    2017-02-01

    Penelitian ini bertujuan untuk mendeskripsikan struktur dan perspektif gender dalam dwilogi novel Padang Bulan dan Cinta di Dalam Gelas, serta mengetahui relevansi perspektif gender dalam dwilogi novel tersebut. Dalam melakukan penelitian ini dipergunakan dua teori, yaitu teori struktur dan kritik sastra feminisme yang berfokus pada perempuan sebagai pembaca. Teori struktural digunakan untuk menganalisis unsur-unsur intrinsik dalam dwilogi novel tersebut. Teori kritik sastra feminis digunakan untuk mengkaji perspektif gender dalam dwilogi novel tersebut. Metode yang digunakan dalam penelitian ini adalah metode kualitatif deskriptif analisis. Hasil penelitian ini menunjukkan bahwa (1 struktur dalam dwilogi novel Padang Bulan dan Cinta di Dalam Gelas berupa tema, alur, tokoh dan penokohan, latar, sudut pandang, dan amanat, (2 perspektif gender yang muncul dalam dwilogi novel Padang Bulan dan Cinta di Dalam Gelas berupa kesetaraan gender dan ketidakadilan gender. Kesetaraan gender dalam novel Padang Bulan berupa akses, partisipasi, dan kontrol. Adapun ketidakadilan gender dalam novel Padang Bulan berupa marginalisasi terhadap perempuan, subordinasi terhadap perempuan, streotipe terhadap perempuan, kekerasan terhadap perempuan, dan beban kerja. (3 dwilogi novel Padang Bulan dan Cinta di Dalam Gelas sangat relevan dijadikan sebagai bahan bacaan sastra di SMA. Kata kunci: gender, struktur, feminisme

  4. Library holdings for Cradle of the Earthquake: Exploring the Underwater San Andreas Fault on the R/V Pacific Storm and the SRV Derek M. Baylis in the North Pacific Ocean between September 10, 2010 and October 3, 2010

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Library Catalog may include: Data Management Plans, Cruise Plans, Cruise Summary Reports, Scientific "Quick Look Reports", Video Annotation Logs, Image Collections,...

  5. A study of tectonic activity in the Basin-Range Province and on the San Andreas Fault. No. 2: Lithospheric structure, seismicity, and contemporary deformation of the United States Cordillera

    Science.gov (United States)

    Smith, R. B.

    1986-01-01

    The structural evolution of the U.S. Cordillera has been influenced by a variety of tectonic mechanisms including passive margin rifting and sedimentation; arc volcanism; accretion of exotic terranes; intraplate magmatism; and folding and faulting associated with compression and extension processes that have profoundly influenced the lithospheric structure. As a result the Cordilleran crust is laterally inhomogeneous across its 2000 km east-west breadth. It is thin along the West Coast where it has close oceanic affinities. The crust thickens eastward beneath the Sierra Nevada, then thins beneath the Basin-Range. Crustal thickening continues eastward beneath the Colorado Plateau, the Rocky Mountains, and the Great Plains. The total lithospheric thickness attains 65 km in the Basin-Range and increases eastward beneath the Colorado Plateau. The upper-crust, including the crystalline basement of the Cordillera, has P sub G velocities of 6 km/s in the Basin-Range and Rio Grande Rift. Lower P sub G velocities of 5.4 to 5.7 km/s are associated with the youthful Yellowstone, Valles and Long Valley calderas and the Franciscan assemblage of the western coastal margin. Averaged crustal velocity reflects integrated tectonic evolution of the crust-thick silicic bodies, velocity reversals, and a thin crust produce low averaged velocities that are characteristic of a highly attenuated and thermally deformed crust.

  6. Redwares from Gubbacka's medieval village: regional and inter-regional views on ceramic nerworks and technology (sem-eds) / Elisabeth Holmqvist, Riikka Väsisänan, Andreas Koivisto

    Index Scriptorium Estoniae

    Holmqvist, Elisabeth

    2014-01-01

    Punased savinõud olid kesk- ja uusaegse Lääne- ja Põhja-Euroopa kõige tavalisem keraamikarühm. Uurimuse eesmärgiks on selgitada. kas keraamika analüüs SEM-EDS meetodil annab lisainfot Gubbacka elanike kaubakontaktide kohta

  7. Stenhammer, Wilhelm. sinfonien Nr. 1 F-Dur und Nr. 2 g-Moll op. 34, Excelsior! op. 13, Serenade F-Dur op. 31. Sinfonieorchester Göteborg, Neeme Järvi / Andreas K. W. Meyer

    Index Scriptorium Estoniae

    Meyer, Andreas K. W.

    1995-01-01

    Uuest heliplaadist "Stenhammer, Wilhelm. sinfonien Nr. 1 F-Dur und Nr. 2 g-Moll op. 34, Excelsior! op. 13, Serenade F-Dur op. 31. Sinfonieorchester Göteborg, Neeme Järvi". DG 2 CD 445857-2 (WD: 138'37")

  8. Anmeldelse af Ulrik Rammeskow Bang-Pedersen, Lasse Højlund Christensen, Kim Sommer Jensen, Christian Jul Madsen & Andreas Kærsgaard Mylin: Rekonstruktion – teori og praksis (2011)

    DEFF Research Database (Denmark)

    Werlauff, Erik

    2011-01-01

    Artiklen anmelder det nævnte værk, som i detaljer behandler lov nr. 718 af 25. juni 2010, der indførte regler i konkursloven, som muliggør rekonstruktion af både fysiske og juridiske personer med henblik på virksomhedsoverdragelse og tvangsakkord, og således at skyldneren ikke selv kan standse re...

  9. The representation of disability in the media in the UK and France: implications for free speech and diversity in light of Article 8 of the Convention on the Rights of Persons with Disabilities / Andreas Dimopoulos

    Index Scriptorium Estoniae

    Dimopoulos, Andreas

    2017-01-01

    Sõnavabadusest ja puuetega inimeste kaasamisest ringhäälinguseaduse tähenduses Suurbritannia, Prantsuse ja ELi õiguses; puuetega inimeste õiguste konventsiooni artikli 8 mõjust riigisisesele regulatsioonile

  10. Lauretsius : Trash, pop&kitš ehk mäluta tsitaadid õhtumaade allakäigu ajastust = Trash, Pop&kitsch or quotations without memory from the era of the decline of the West / Andreas Trossek

    Index Scriptorium Estoniae

    Trossek, Andreas, 1980-

    2007-01-01

    Maalikunstnik Lauri Sillaku alias Lauretsiuse loomingust ja koostööst erinevate partneritega. Nende ühiseks visiitkaardiks kujunesid suured trash-maalid, tulvil apokalüptilist pinget ja grandioossust. Ta on armastanud alati "vinti üle keerata", millest kumab kitši toimeloogika tundmine ja selle ärakasutamine. Camp ja punk ei välista teineteist. Ta on maalinud ka Madalmaade renassansijärgse miniatuurmaali jälgedes pilte puuviljadest, kattes need kristlik-mütoloogilise tähenduskastme ja krakleega või on raamistanud ilutsevate raamidega isegi grafitit. Tommy nime all tegutses Toomas Tõnissoo

  11. Solving the 3D MHD equilibrium equations in toroidal geometry by Newton's method

    International Nuclear Information System (INIS)

    Oliver, H.J.; Reiman, A.H.; Monticello, D.A.

    2006-01-01

    We describe a novel form of Newton's method for computing 3D MHD equilibria. The method has been implemented as an extension to the hybrid spectral/finite-difference Princeton Iterative Equilibrium Solver (PIES) which normally uses Picard iteration on the full nonlinear MHD equilibrium equations. Computing the Newton functional derivative numerically is not feasible in a code of this type but we are able to do the calculation analytically in magnetic coordinates by considering the response of the plasma's Pfirsch-Schlueter currents to small changes in the magnetic field. Results demonstrate a significant advantage over Picard iteration in many cases, including simple finite-β stellarator equilibria. The method shows promise in cases that are difficult for Picard iteration, although it is sensitive to resolution and imperfections in the magnetic coordinates, and further work is required to adapt it to the presence of magnetic islands and stochastic regions

  12. Numerical simulation of radionuclide transport in the unsaturated zone

    International Nuclear Information System (INIS)

    Danchiv, Alexandru; Didita, Liana; Ilie, Petre

    2001-01-01

    In dealing with numerical modeling of flow in the unsaturated zone two main difficulties arise, both of them due to the strong nonlinearly of the governing equation, namely solution convergence and parameter identification. In the first part of the paper a finite element model of Richards equation is presented where both Picard and Newton scheme are implemented. While Picard method is cheaper computationally but fails or converges slowly, the Newton method has a higher rate of convergence. In order to use the advantages of both methods a simple strategy is suggested in which Picard and Newton method are alternatively used according to the rate of solution convergence. The second part of the paper analyses the possibilities of determining the unsaturated soil hydraulic parameters that are assumed to be described by Mualem-van Genuchten model. The inverse problem is formulated as a least square problem and solved by an efficient Levenberg-Marquard algorithm. (author)

  13. CIMPA Summer School on Arithmetic and Geometry Around Hypergeometric Functions

    CERN Document Server

    Uludağ, A; Yoshida, Masaaki; Arithmetic and Geometry Around Hypergeometric Functions

    2007-01-01

    This volume comprises the Lecture Notes of the CIMPA Summer School "Arithmetic and Geometry around Hypergeometric Functions" held at Galatasaray University, Istanbul in 2005. It contains lecture notes, a survey article, research articles, and the results of a problem session. Key topics are moduli spaces of points on P1 and Picard-Terada-Deligne-Mostow theory, moduli spaces of K3 surfaces, complex hyperbolic geometry, ball quotients, GKZ hypergeometric structures, Hilbert and Picard modular surfaces, uniformizations of complex orbifolds, algebraicity of values of Schwartz triangle functions, and Thakur's hypergeometric function. The book provides a background, gives detailed expositions and indicates new research directions. It is directed to postgraduate students and researchers.

  14. Efficiency trade-offs of steady-state methods using FEM and FDM. [iterative solutions for nonlinear flow equations

    Science.gov (United States)

    Gartling, D. K.; Roache, P. J.

    1978-01-01

    The efficiency characteristics of finite element and finite difference approximations for the steady-state solution of the Navier-Stokes equations are examined. The finite element method discussed is a standard Galerkin formulation of the incompressible, steady-state Navier-Stokes equations. The finite difference formulation uses simple centered differences that are O(delta x-squared). Operation counts indicate that a rapidly converging Newton-Raphson-Kantorovitch iteration scheme is generally preferable over a Picard method. A split NOS Picard iterative algorithm for the finite difference method was most efficient.

  15. An Alternative Perspective on Simulations

    Science.gov (United States)

    Cone, Theresa Purcell; Cone, Stephen L.

    2016-01-01

    In this letter to the editor of "Strategies: A Journal for Physical and Sport Educators", the authors write that they recently read the "Strategies" article by Antony Parish, "Using Immersion as a Teaching Method to Develop an Understanding, Appreciation and Empathy for Special Needs Populations," in the May/June 2016…

  16. Anthology of Polish Poetry. Fulbright-Hays Summer Seminars Abroad Program, 1998 (Hungary/Poland).

    Science.gov (United States)

    Smith, Thomas A.

    This anthology, of more than 225 short poems by Polish authors, was created to be used in world literature classes in a high school with many first-generation Polish students. The following poets are represented in the anthology: Jan Kochanowski; Franciszek Dionizy Kniaznin; Elzbieta Druzbacka; Antoni Malczewski; Adam Mickiewicz; Juliusz Slowacki;…

  17. Effect of frying oils on quality characteristics of frozen chicken patties ...

    African Journals Online (AJOL)

    Shaista

    2012-02-09

    Feb 9, 2012 ... meat can be alternative to the synthetic antioxidants. (Antony et al., 2000). Honey is gaining ... 2011). The antioxidant capacity of honey and propolis is mainly due to the presence of phenolic ..... Effects of oleoresin rosemary, tertiary butylhydroquinone, and sodium tripolyphosphate on the development of ...

  18. Minerals in fish: does the source matter?

    NARCIS (Netherlands)

    Antony Jesu Prabhu, P.

    2015-01-01

    Antony Jesu Prabhu, P. (2015). Minerals in fish: does the source matter? PhD thesis. Wageningen University, The Netherlands. Minerals are a group of micro-nutrients essential to fish. Meta-analysis of literature data was performed to identify the appropriate response criterion to

  19. Statistical Methods for Studying Genetic Variation in Populations

    Science.gov (United States)

    2012-08-01

    using multilocus genetic data. Genetics, 160(3):1217–1229, 2002. 2.2, 3.1 Antonis C Antoniou, Amanda B Spurdle, Olga M Sinilnikova, Sue Healey , Karen A...Timmermann, Marius Tolzmann, Jason Affour- tit, Dana Ashworth, Said Attiya, Melissa Bachorski, Eli Buglione, Adam Burke, Amanda Caprio, Christopher Celone

  20. Author Details

    African Journals Online (AJOL)

    Cooper, Antony K. Vol 64 (2014) - Articles Assessment of spatial data infrastructures. Abstract PDF. ISSN: 2415-0495. AJOL African Journals Online. HOW TO USE AJOL... for Researchers · for Librarians · for Authors · FAQ's · More about AJOL · AJOL's Partners · Terms and Conditions of Use · Contact AJOL · News. OTHER ...