Coseismic slip distribution of the 2003 Mw 6.6 San Simeon earthquake, California, determined from GPS measurements and seismic waveform data

Details Coseismic slip distribution of the 2003 Mw 6.6 San Simeon earthquake, California, determined from GPS measurements and seismic waveform data Coseismic slip distribution of the 2003 Mw 6.6 San Simeon earthquake, California, determined from GPS measurements and seismic waveform data

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3316315r&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 16, CiteID L16315

Physics

9

Geodesy And Gravity: Seismic Cycle Related Deformations (6924, 7209, 7223, 7230), Geodesy And Gravity: Satellite Geodesy: Results (6929, 7215, 7230, 7240), Seismology: Earthquake Dynamics (1242), Seismology: Earthquake Source Observations (1240), Seismology: Seismicity And Tectonics (1207, 1217, 1240, 1242)

Scientific paper

We combine geodetic and seismic data sets to constrain the coseismic slip distribution of the Mw6.6 San Simeon earthquake which occurred in the central California Coast Ranges on December 22, 2003. We use continuous and survey-mode GPS observations along with seismic waveform data from the California Integrated Seismic Network (CISN). We invert both data sets for the distribution of finite fault slip in a layered-Earth model. The inversion results indicate that the rupture extends to the southeast of the epicenter for approximately 25-30 km and occurred in a relatively shallow depth range between 1 to 10 km. The average and peak slip are 0.61 m and 2.37 m, respectively. The scalar seismic moment is 7.85e18 Nm, and the static stress drop 1.7 MPa. This thrust earthquake is characterized by its shallow, along-strike extended slip.

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