Postseismic Rebound in Fault Step-Overs Caused by Pore Fluid Flow

  • Gilles Peltzer
    G. Peltzer, P. Rosen, F. Rogez, Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA.
  • Paul Rosen
    G. Peltzer, P. Rosen, F. Rogez, Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA.
  • Francois Rogez
    G. Peltzer, P. Rosen, F. Rogez, Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA.
  • Ken Hudnut
    K. Hudnut, U.S. Geological Survey, Pasadena, CA 91125, USA.

書誌事項

公開日
1996-08-30
DOI
  • 10.1126/science.273.5279.1202
公開者
American Association for the Advancement of Science (AAAS)

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説明

<jats:p>Near-field strain induced by large crustal earthquakes results in changes in pore fluid pressure that dissipate with time and produce surface deformation. Synthetic aperture radar (SAR) interferometry revealed several centimeters of postseismic uplift in pull-apart structures and subsidence in a compressive jog along the Landers, California, 1992 earthquake surface rupture, with a relaxation time of 270 ± 45 days. Such a postseismic rebound may be explained by the transition of the Poisson's ratio of the deformed volumes of rock from undrained to drained conditions as pore fluid flow allows pore pressure to return to hydrostatic equilibrium.</jats:p>

収録刊行物

  • Science

    Science 273 (5279), 1202-1204, 1996-08-30

    American Association for the Advancement of Science (AAAS)

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