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Strong motion compatible source geometry

Kanth, STG Raghu and Iyengar, RN (2008) Strong motion compatible source geometry. In: Journal of Geophysical Research, 113 (B4).

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Official URL: http://www.agu.org/pubs/crossref/2008/2006JB004278...


Strong motion array records are analyzed in this paper to identify and map the source zone of four past earthquakes. The source is represented as a sequence of double couples evolving as ramp functions, triggering at different instants, distributed in a region yet to be mapped. The known surface level ground motion time histories are treated as responses to the unknown double couples on the fault surface. The location, orientation, magnitude, and risetime of the double couples are found by minimizing the mean square error between analytical solution and instrumental data. Numerical results are presented for Chi-Chi, Imperial Valley, San Fernando, and Uttarakashi earthquakes. Results obtained are in good agreement with field investigations and those obtained from conventional finite fault source inversions.

Item Type: Journal Article
Publication: Journal of Geophysical Research
Publisher: American Geophysical Union
Additional Information: Copyright of this article belongs American Geophysical Union.
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 04 Jun 2010 08:51
Last Modified: 04 Jun 2010 08:51
URI: http://eprints.iisc.ac.in/id/eprint/26717

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