HR: 1340h
AN: T43A-1371    [Abstracts]
TI: Structures of Taipei basin from waveform inversion
AU: * Wen, S
EM: strong@eq.ccu.edu.tw
AF: Institude of Seismology, Natl. Chung-Cheng Univ., 168, University Rd., Min-Hsiung, Chiayi, 621 Taiwan
AU: Chen, C H
EM: seichen@eq.ccu.edu.tw
AF: Institude of Seismology, Natl. Chung-Cheng Univ., 168, University Rd., Min-Hsiung, Chiayi, 621 Taiwan
AB: We have performed the nonlinear waveform inversion for the velocity structures beneath the Taipei basin in the northern Taiwan. The wave propagation modeling is carried out using a 3D precisely spectral element simulation, and a neighbourhood algorithm implements the inversion by minimizing the misfit between synthetic and observed seismograms. The consistence between the observed and synthetic waveforms shows that the reliability of the obtained velocity structure. The result makes us not only get better understanding the complex basin structure beneath the Taipei basin area, but can identify waveform characteristics due to velocity heterogeneity and topographic effect. In addition, the results also shown how the computation time and memory requirements scale with the dimension of the parameter space and size of the ensemble for the spectral element method.
DE: 6982 Tomography and imaging (7270, 8180)
DE: 8180 Tomography (6982, 7270)
SC: Tectonophysics [T]
MN: Fall Meeting 2005