HR: 1340h
AN: T13E-1637    [Abstracts]
TI: Estimations of the Shallow Velocity Structures in the Taipei Basin, Taiwan, Using Inversion of the Receiver Function
AU: * Wu, C
EM: sei9010@eq.ccu.edu.tw
AF: Institute of Seismology, National Chung Cheng University, 168, University Rd. Min Hsiung, Chia-Yi, 621, Taiwan
AU: Huang, H
EM: seihuey@eq.ccu.edu.tw
AF: Institute of Seismology, National Chung Cheng University, 168, University Rd. Min Hsiung, Chia-Yi, 621, Taiwan
AB: It is essential to estimate the S-wave velocity structure of sediments on the bedrock for the strong-motion simulation. Based on the receiver function method, we investigate the shallow S-wave velocity structures of the Taipei basin using the strong-motion records of TSMIP in Taiwan. A receiver function of a complex Fourier spectral ratio (R/V), radial over vertical component, is originally applied to estimate S-wave velocity structures of crust and mantle using the far-field long-period P-waves (Langston, 1979). In this study, the PS-phase conversion is applied to detect the depths of the seismic bedrock. We calculate the receiver functions at the frequencies of roughly 1-5Hz. According to the inversion of the receiver functions, the depths of the bedrock gradually increase from southeast to northwest. The result is in good agreement with the available geological information in the Taipei basin
DE: 7200 SEISMOLOGY
DE: 7212 Earthquake ground motions and engineering seismology
SC: Tectonophysics [T]
MN: 2007 Fall Meeting