HR: 15:10h
AN: U53A-06    [Abstracts]
TI: Analysis of High Rate GPS Data From the September 12 and 13 Strong Motion Events off Sumatra
AU: * Genrich, J
EM: jeff@gps.caltech.edu
AF: Tectonics Observatory, California Institute of Technology, MS 100-23, 1200 E. California Blvd, Pasadena, CA 91125, United States
AU: Konca, O
EM: ozgun@gps.caltech.edu
AF: Tectonics Observatory, California Institute of Technology, MS 100-23, 1200 E. California Blvd, Pasadena, CA 91125, United States
AU: Sladen, A
EM: sladen@gps.caltech.edu
AF: Tectonics Observatory, California Institute of Technology, MS 100-23, 1200 E. California Blvd, Pasadena, CA 91125, United States
AU: Sieh, K
EM: sieh@gps.caltech.edu
AF: Tectonics Observatory, California Institute of Technology, MS 100-23, 1200 E. California Blvd, Pasadena, CA 91125, United States
AU: Avouac, J
EM: avouac@gps.caltech.edu
AF: Tectonics Observatory, California Institute of Technology, MS 100-23, 1200 E. California Blvd, Pasadena, CA 91125, United States
AU: Galetzka, J
EM: galetzka@gps.caltech.edu
AF: Tectonics Observatory, California Institute of Technology, MS 100-23, 1200 E. California Blvd, Pasadena, CA 91125, United States
AB: The Sumatran Global Positioning System Array (SuGAr) consists of currently 29 continuous GPS stations that cover the forearc region of Sumatra. Four stations in the southern part of the array recorded high rate (1 sec. sampling rate) data during and surrounding the 3 major regional earthquakes (M8.4, M7.9, and M7.0) on September 12 and 13. Using the GAMIT/TRACK software, we compute 3-component time series of station displacements to investigate coseismic and postseismic kinematics. We present spectral characteristics of the recorded coseismic wave forms and compare them to model predictions. We analyze the observed early postseismic displacement in the context of frictional sliding models
DE: 1207 Transient deformation (6924, 7230, 7240)
DE: 1209 Tectonic deformation (6924)
DE: 1242 Seismic cycle related deformations (6924, 7209, 7223, 7230)
DE: 7212 Earthquake ground motions and engineering seismology
DE: 7240 Subduction zones (1207, 1219, 1240)
SC: Union [U]
MN: 2007 Fall Meeting