A Comprehensive Relocation of Earthquakes in Taiwan from 1991 to 2005
A Comprehensive Relocation of Earthquakes in Taiwan from 1991 to 2005
复制标题
DOI：
10.1785/0120070166
复制
发表时间：
2008-06
影响因子：
3
通讯作者：
Yih‐Min Wu;Chien‐Hsin Chang;Li Zhao;T. Teng;M. Nakamura
中科院分区：
文献类型：
--
作者：
Yih‐Min Wu;Chien‐Hsin Chang;Li Zhao;T. Teng;M. Nakamura
我们在台湾中央气象局地震台网（CWBSN）地震目录的基础上，对台湾近15年来发生的267,210次地震进行了全面的重新定位，并在三个方面进行了改进。首先，我们整合了分布在台湾岛各地的680个台湾强震仪器计划（TSMIP）台站的S-P时间大数据集，以提高岛上地震的覆盖范围。其次，我们在琉球岛链南部增加了18个日本气象站（JMA），以增强台站对东部近海事件的覆盖，特别是在台湾东北部俯冲带附近。第三，采用三维VP和VP=VS模型预测P波和S波的传播时间。这些改进在地震重新定位方面的有效性可以从三个方面看出：(1)p波到达时间和S-P时间的残差减少；(2)更好地理解了峰值加速度与震中距离之间的衰减关系；(3)p波到达时间和S-P时间的台站校正具有地质意义的模式。联机资料：1991年1月至1991年1月台湾重新定位地震目录
We have carried out a comprehensive relocation of a total of 267,210 earthquakes in Taiwan that occurred during the past 15 yr. We based our relocation process on the earthquake catalog of the Taiwan Central Weather Bureau Seismic Network (CWBSN) and made improvements in three aspects. First, we incorporated a large dataset of the S-P times from 680 Taiwan Strong-Motion Instrumentation Pro- gram (TSMIP) stations distributed throughout the island of Taiwan to improve the coverage of earthquakes on the island. Secondly, we added 18 Japan Meteorological Agency (JMA) stations in the southern Ryukyu Island chain to enhance the station coverage for eastern offshore events, especially around the subduction zone northeast of Taiwan. Thirdly, we adopted 3D VP and VP=VS models in predicting the travel times of P and S waves. The effectiveness of these improvements in earthquake re- location can be seen in three aspects: (1) the reduction in the residuals of P-wave arrival times and S-P times, (2) a better understanding of the attenuation relationship between the peak-ground acceleration and epicentral distance, and (3) the geologically meaningful patterns of station corrections to P-wave arrival times and S-P times. Online Material: Catalog of relocated earthquakes in Taiwan from January 1991 to