The complete (3-D) surface displacement field in the epicentral area of the 1999 M_W7.1 Hector Mine Earthquake, California, from space geodetic observations

Creators: Fialko, Yuri; Simons, Mark; Agnew, Duncan

Abstract

We use Interferometric Synthetic Aperture Radar (InSAR) data to derive continuous maps for three orthogonal components of the co-seismic surface displacement field due to the 1999 M_w7.1 Hector Mine earthquake in southern California. Vertical and horizontal displacements are both predominantly antisymmetric with respect to the fault plane, consistent with predictions of linear elastic models of deformation for a strike-slip fault. Some deviations from symmetry apparent in the surface displacement data may result from complexity in the fault geometry.

Additional Information

© 2001 American Geophysical Union. Original InSAR data are copyright of the European Space Agency, distributed by Eurimage, Italy, and acquired via the WInSAR Consortium. We thank two anonymous referees for helpful reviews of this manuscript. Maps of the co-seismic surface displacement field obtained from the analysis of the InSAR data are available from the authors. This research was supported by the Southern California Earthquake Center. SCEC is funded by NSF Cooperative Agreement EAR-8920136 and USGS Cooperative Agreements 14-08-0001-A0899 and 1434- HQ-97AG01718. The SCEC contribution number for this paper is 587. Contribution number 8810 of the Division of Geological and Planetary Sciences, Seismological Laboratory, California Institute of Technology.

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