| 英文摘要 |
Microzonation of seismic hazard potential becomes necessary in Kaohsiung area after the Central Geological Survey upgraded the Chishan active fault from suspected fault to Category I in 2010. In this study, a catalog of 2065 shallow earthquakes occurred from 1900 to 2013 with Mw magnitudes ranging from 5.0 to 8.2, and 11 disastrous earthquakes occurred from 1683-1899, as well as Chishan active fault and 4 active faults of Category I in the vicinity are used to estimate the seismic hazard potential in Kaohsiung area for seismic microzonation. The results reveal that the highest earthquake hazard potential areas in Kaohsiung are located in the northeastern, central and northern parts of southwestern region. The probabilities of seismic intensity exceeding CWB intensity scale VII (0.4g) in 10, 30, and 50-year periods in above areas are 0-5%, greater than 5％ and 10%, respectively. Finally, by comparing with the seismic zoning map of Taiwan in current building code, we find that classification of Kaohsiung seismic zone should be pay attention to the following areas: one is in the northeastern area around Shanlin, Meinong, Neimen and Chishan. The other is in the central area around Alian, Tianliao, Yanchao, Gangshan, Ciaotou, Mituo, Zihguan, Dashe, Renwu, Niaosong, Fongshan, Nanzih, Zuoying, Gushan, Sanmin, Cianjin, Sinsing and Yancheng. Results of this study provide important information for site evaluation of critical facilities, for mitigation of regional earthquake hazards, as well as critical information for earthquake disaster management. |
