What question did this study set out to answer?

To measure postseismic crustal deformation in fault step-overs following a major earthquake and determine whether pore fluid flow drives this relaxation.

August 30, 1996Science

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

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Authors

GPG. PeltzerPlanetary Science Institute PRP. A. RosenCalifornia Institute of Technology FRF. RogezCalifornia Institute of Technology

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Implication

Interferometric analysis reveals postseismic uplift and subsidence along the Landers earthquake rupture, indicating pore fluid flow drives crustal rebound.

Key Points

To measure postseismic crustal deformation in fault step-overs following a major earthquake and determine whether pore fluid flow drives this relaxation.
Used synthetic aperture radar (SAR) interferometry to map surface deformation around fault step-over structures following the 1992 Landers, California, earthquake.
Modeled deformation mechanisms via changes in rock Poisson's ratio from undrained to drained states as pore fluid pressure returned to hydrostatic equilibrium.
Detected several centimeters of postseismic uplift across pull-apart structures and subsidence within a compressive jog along the fault surface rupture.
Measured a characteristic relaxation time of 270 ± 45 days for the postseismic deformation rebound.

Cite This Study

Peltzer et al. (1996) studied this question.

synapsesocial.com/papers/6a6fa022e36a167817e155b2 https://doi.org/10.1126/science.273.5279.1202

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August 30, 1996Science

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

View Full Paper

Ask AI

Bookmark

Authors

GPG. PeltzerPlanetary Science Institute PRP. A. RosenCalifornia Institute of Technology FRF. RogezCalifornia Institute of Technology

Discussion

Member takes

Implication

Interferometric analysis reveals postseismic uplift and subsidence along the Landers earthquake rupture, indicating pore fluid flow drives crustal rebound.

Key Points

To measure postseismic crustal deformation in fault step-overs following a major earthquake and determine whether pore fluid flow drives this relaxation.
Used synthetic aperture radar (SAR) interferometry to map surface deformation around fault step-over structures following the 1992 Landers, California, earthquake.
Modeled deformation mechanisms via changes in rock Poisson's ratio from undrained to drained states as pore fluid pressure returned to hydrostatic equilibrium.
Detected several centimeters of postseismic uplift across pull-apart structures and subsidence within a compressive jog along the fault surface rupture.
Measured a characteristic relaxation time of 270 ± 45 days for the postseismic deformation rebound.

Cite This Study

Peltzer et al. (1996) studied this question.

synapsesocial.com/papers/6a6fa022e36a167817e155b2 https://doi.org/10.1126/science.273.5279.1202

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