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Science 30 August 1996:
Vol. 273. no. 5279, pp. 1202 - 1204
DOI: 10.1126/science.273.5279.1202
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Reports

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

Gilles Peltzer, Paul Rosen, Francois Rogez, Ken Hudnut

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.

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


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Coseismic Slip and Afterslip of the Great Mw 9.15 Sumatra-Andaman Earthquake of 2004.
M. Chlieh, J.-P. Avouac, V. Hjorleifsdottir, T.-R. A. Song, C. Ji, K. Sieh, A. Sladen, H. Hebert, L. Prawirodirdjo, Y. Bock, et al. (2007)
Bulletin of the Seismological Society of America 97, S152-S173
   Abstract »    Full Text »    PDF »
The structural evolution of dilational stepovers in regional transtensional zones.
N. De Paola, R. E. Holdsworth, C. Collettini, K. J. W. Mccaffrey, and M. R. Barchi (2007)
Geological Society, London, Special Publications 290, 433-445
   Abstract »    Full Text »    PDF »
The Coseismic Displacement Fields for the 1992 Landers and 1999 Hector Mine Earthquakes in California, from Regional GPS Observations.
(2002)
Bulletin of the Seismological Society of America 92, 1365-1376
Continuous GPS Observations of Postseismic Deformation Following the 16 October 1999 Hector Mine, California, Earthquake (Mw 7.1).
(2002)
Bulletin of the Seismological Society of America 92, 1403-1422
The 1999 (Mw 7.1) Hector Mine, California, Earthquake: Near-Field Postseismic Deformation from ERS Interferometry.
(2002)
Bulletin of the Seismological Society of America 92, 1433-1442
Interactions between the Landers and Hector Mine, California, Earthquakes from Space Geodesy, Boundary Element Modeling, and Time-Dependent Friction.
(2002)
Bulletin of the Seismological Society of America 92, 1450-1469
Transient Stress-Coupling Between the 1992 Landers and 1999 Hector Mine, California, Earthquakes.
(2002)
Bulletin of the Seismological Society of America 92, 1470-1486
Analysis of Ultralow-Frequency Electromagnetic Field Measurements Associated with the 1999 M 7.1 Hector Mine, California, Earthquake Sequence.
(2002)
Bulletin of the Seismological Society of America 92, 1513-1524
The lowest place on Earth is subsiding--An InSAR (interferometric synthetic aperture radar) perspective.
G. Baer, U. Schattner, D. Wachs, D. Sandwell, S. Wdowinski, and S. Frydman (2002)
Geological Society of America Bulletin 114, 12-23
   Abstract »    Full Text »    PDF »
Evidence of Nonlinear Elasticity of the Crust from the Mw7.6 Manyi (Tibet) Earthquake.
G. Peltzer, F. Crampé, and G. King (1999)
Science 286, 272-276
   Abstract »    Full Text »
Viscoelastic Flow in the Lower Crust after the 1992 Landers, California, Earthquake.
J. Deng, M. Gurnis, H. Kanamori, and E. Hauksson (1998)
Science 282, 1689-1692
   Abstract »    Full Text »
Evidence of Shallow Fault Zone Strengthening After the 1992 M7.5 Landers, California, Earthquake.
Y. Li, J. E. Vidale, K. Aki, F. Xu, and T. Burdette (1998)
Science 279, 217-219
   Abstract »    Full Text »


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