| 英文摘要 |
In this study, we adopt the damping least-square inversion method to investigate the Vp structures and Vp/Vs ratios of the crust beneath the Yun-Chia-Nan area, Taiwan. Previous studies have shown that velocity structure can be used as an indicator of the geometry of a fault and general aspects of the area's tectonics. Therefore, the goal of this research is to analyze the degree of correlation between the velocity structure and the seismic characteristics with respect to the tectonic implications of the area. Finally, the distribution of Vp/Vs ratios and its association with fault activities is also investigated. Our results indicate that the variations in velocity structure beneath the Yun-Chia-Nan area are caused by local geological structures, such as fault crossing. We also find that most earthquakes occur in areas that have Vp/Vs gradients that vary greatly. In addition, according to the distribution of the earthquakes, there appears to be a west-dipping fault west of the Chukou fault; however, this needs to be investigated further in a future study. |
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