| 英文摘要 |
In this study, we adopt the damping least-square inversion method to investigate Vp structures and Vp/Vs ratios of the crust in southwestern Taiwan. Previous studies have shown that velocity structure can be used as an indicator of the geometry of a fault and the estimation of strong motion. Therefore, the goal of this research is to obtain a high resolution velocity structure and seismic characteristics with respect to the wave propagation in this area. Finally, the distribution of the Vp/Vs ratio and its association with fault activities is also investigated. Our results indicate that the variations in velocity structure in southwestern Taiwan are caused by local geological structures, such as fault crossings. We also find that most earthquakes occur in areas that have Vp/Vs gradients that vary greatly. In addition, through the simulation of strong earthquakes that have occurred in this area, the obtained 3D velocity structure can be more reliably utilized in seismic hazard assessment. |
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