Physics
Scientific paper
Sep 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.2733h&link_type=abstract
Geophysical Research Letters, Volume 27, Issue 17, p. 2733-2736
Physics
8
Geodesy And Gravity: Space Geodetic Surveys, Seismology: Earthquake Parameters, Tectonophysics: Dynamics, Seismotectonics
Scientific paper
The M=7.1 Hector Mine earthquake ruptured the Lavic Lake fault near Twentynine Palms, CA at 09:46 UTC October 16, 1999. Because it occurred near the eastern edge of the Southern California Integrated GPS Network (SCIGN), a network of permanent, continuously recording GPS receivers for measuring the crustal deformation field around Los Angeles, CA, it was possible to determine the deformation associated with the earthquake with unprecedented speed and reliability. Thirty-four stations recorded displacements over the 3-sigma level. The displacements measured with GPS can be modeled by a fault 46.2+/-2.6km long, 8.2+/-1.0km wide, striking 330°, dipping 84° east, with 301+/-36cm right lateral strike-slip, and 145+/-36cm of east-up dip-slip, yielding a potency of 1.3 km3 and geodetic moment of 3.8×1026dyne-cm. The trace and dip of the model fault is consistent with the observed ground rupture and seismic focal mechanisms.
Argus Donald F.
Donnellan Andrea
Heflin Michael Brent
Hurst Kenneth J.
Jefferson David C.
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