HR: 1340h
AN: G13B-1237    [Abstracts]
TI: Seismic Ground Motion and Coseismic Displacement Associated with the 26 December 2006 off Pingtung, Taiwan, Earthquake
AU: * Chen, H
EM: chenhy@eart.sinica.sdu.tw
AF: Assistant Research Scientist, P.O.Box 1-55m Nankang, Taipei, Taiwan, Taipei, 115, Taiwan
AU: Kuo, L
EM: kuo@earth.sinica.edu.tw
AF: Assistant Research Scientist, P.O.Box 1-55m Nankang, Taipei, Taiwan, Taipei, 115, Taiwan
AU: Yu, S
EM: yusb@earth.sinica.edu.tw
AF: Research Fellow, P.O.Box 1-55m Nankang, Taipei, Taiwan, Taipei, 115, Taiwan
AU: Liu, C
EM: liucc@earth.sinica.edu.tw
AF: Associate Research Fellow, P.O.Box 1-55m Nankang, Taipei, Taiwan, Taipei, 115, Taiwan
AB: Two sequence earthquakes (ML=6.96 and 6.99) occurred in southern Taiwan off Pingtung, and the main shocks are only at an interval of 8 minutes. These earthquakes caused more than ten centimeters of ground motion, and a few centimeters of coseismic deformation, respectively. All of these displacements have been recorded by the Continuously Observation Recording GPS Stations (CORS), and estimated by two different post-processing methods, namely the kinematic positioning and the daily solution algorithm. Precise evaluation of the capturing instantaneous ground motion and coseismic deformation at a level of just millimeters requires rigorous computational procedures. In this paper, a set of high sampling rate (1Hz) data from the CORS has been used to study simultaneous ground motion during the Pingtung earthquakes. A completely regular algorithm to estimate the crustal deformation in the Taiwan area has been applied to acquire coseismic deformation as a result of the Pingtung earthquakes. Applying beyond 2 weeks of data and 50 stations of the CORS, the coseismic deformation can be precisely estimated. Since the instantaneous ground motion can be computed by continuous GPS observations and the coseismic deformation can be acquired precisely and integrated with seismic data, these results can assist the study of earthquake geodesy.
DE: 1200 GEODESY AND GRAVITY
DE: 1242 Seismic cycle related deformations (6924, 7209, 7223, 7230)
DE: 6924 Interferometry (1207, 1209, 1242)
SC: Geodesy [G]
MN: 2007 Fall Meeting