HR: 1330h
AN: S42E-0209    [PDF]
TI: Tectonic implications of 1998 Ruey-Li, Taiwan earthquake Sequence
AU: * Chen, C
EM: seichen@eq.ccu.edu.tw
AF: Chau-Huei Chen, 160,San-Shing,Ming-Hsuing, Chiayi, 621 Taiwan
AU: Teng, T
EM: lteng@usc.edu
AF: Ta-Liang Teng, Department of Earth Sciences, University of Southern California, Los Angeles, CA 90089 United States
AB: We have investigated the 1998 M6.2 Ruey-Li earthquakes. It is found that the earthquake is generated by ruptures essentially along nearby sections of a large through-going fault zone along the Western Foothills of Taiwan. The rapid termination (in ten days) of the M6.2 Ruey-Li sequence is interpreted by the presence of an asperity in terms of the Peikang basement high, which dominates the tectonic deformation in central western Taiwan. We have carried out the relocation of the aftershocks, their fault-plane solutions, plus stress inversion, waveform source slip inversion, Coulomb stress change calculations and regional strain energy calculations for the Ruey-Li sequence. We have concluded that the event is results of the regional stress accumulation due to the plate convergence, the Ruey-Li earthquake sequence would likely have escalated into a much larger rupture including the Chelungpu fault had it not been for the presence of the Peikang basement high.
DE: 7200 SEISMOLOGY
DE: 7215 Earthquake parameters
DE: 7230 Seismicity and seismotectonics
SC: Seismology [S]
MN: 2003 Fall Meeting