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Feigl et al. 1995

Feigl, K.L., Sergent, A. and Jacq, D. (1995). Estimation of an earthquake focal mechanism from a satellite radar interferogram: Application to the December 4, 1992 Landers aftershock. Geophysical Research Letters 22: doi: 10.1029/94GL03212. issn: 0094-8276.

Using the interferometric fringes generated by the phase difference between a pair of synthetic-aperture radar (SAR) images acquired by the ERS-1 satellite, we estimate the focal mechanism of a small, shallow thrust earthquake. The inversion procedure is an iterative, linearized least-squares algorithm based on a standard elastic dislocation formulation for coseismic displacements. Our preferred estimate is a thrust focal mechanism with its hypocenter at (N34.35¿¿0.4 km, W116.91¿¿0.2 km, 2.6¿0.3 km depth) on a plane dipping southward beneath the San Bernardino Mountains, with a moment magnitude (MW) of 5.4. The strike, dip, and rake are N106¿E¿7¿, 28¿¿4¿, and 93¿¿4¿, respectively on a fault 3.1¿0.5 km wide and 2.9¿0.4 km long. The precision of these estimates is competitive with seismological determinations. ¿ American Geophysical Union 1995

BACKGROUND DATA FILES

	Abstract

Keywords
Seismology, Earthquake parameters, Geodesy and Gravity, Instruments and techniques, Tectonophysics, Continental tectonics—general

Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/

Publisher
American Geophysical Union
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