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Read Full Article (file size: 2658470 bytes) Cited by
GEOPHYSICAL RESEARCH LETTERS,
VOL. 33,
L06304,
doi:10.1029/2005GL025429,
2006
Static stress change from the 8 October, 2005 M = 7.6 Kashmir earthquake
Tom Parsons
U.S. Geological Survey, Menlo Park, California, USA
Robert S. Yeats
Department of Geosciences, Oregon State University, Corvallis, Oregon, USA
Yuji Yagi
Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
Ahmad Hussain
Geological Survey of Pakistan, Peshawar City, Pakistan
Abstract
We calculated static stress changes from the devastating M = 7.6 earthquake that shook Kashmir on 8 October, 2005. We mapped Coulomb stress change on target fault planes oriented by
assuming a regional compressional stress regime with greatest principal stress directed orthogonally to the mainshock strike.
We tested calculation sensitivity by varying assumed stress orientations, target-fault friction, and depth. Our results showed
no impact on the active Salt Range thrust southwest of the rupture. Active faults north of the Main Boundary thrust near Peshawar
fall in a calculated stress-decreased zone, as does the Raikot fault zone to the northeast. We calculated increased stress
near the rupture where most aftershocks occurred. The greatest increase to seismic hazard is in the Indus-Kohistan seismic
zone near the Indus River northwest of the rupture termination, and southeast of the rupture termination near the Kashmir
basin.
Received 7
December
2005;
accepted 8
February
2006;
published 21
March
2006.
Index Terms: 7215 Seismology: Earthquake source observations (1240); 7223 Seismology: Earthquake interaction, forecasting, and prediction (1217, 1242); 7230 Seismology: Seismicity and tectonics (1207, 1217, 1240, 1242); 8164 Tectonophysics: Stresses: crust and lithosphere.
Read Full Article (file size: 2658470 bytes) Cited by
Citation: Parsons, T., R. S. Yeats, Y. Yagi, and A. Hussain
(2006),
Static stress change from the 8 October, 2005 M = 7.6 Kashmir earthquake,
Geophys. Res. Lett.,
33,
L06304,
doi:10.1029/2005GL025429.
This paper is not subject to U.S. copyright. Published in 2006 by the
American Geophysical Union.
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