三峡地区水库诱发地震精定位方法对比研究

Research on Comparison of Reservoir-Induced Earthquake Fine Positioning Methods in Three Gorges area

基于三峡数字遥测地震台网目前使用的地震数据分析软件EDSP-IAS 2.2接挂的Hypo2000定位程序,对三峡库首区两个区域所选取的324个水库诱发地震事件进行重新定位,其结果与原有地震数据分析软件waveview接挂的GENETIC(遗传法)定位结果相对比分析。结果表明:Hypo2000程序优于遗传法定位结果,特别是在控制震中分布和震源深度均有较大改进,能较为合理地解释地震成因,达到精定位的目的。

Based on locating procedure Hypo2000 with EDSP-IAS 2. 2 which is used by the Three Gorges digital telemetry seismic network presently, we have relocated 324 reservoir-induced seismic events from two areas of the Three Gorges reservoir head region, and compared the results with GENEIC. It turned out that the results of Hypo2000 was better than that of GENETIC, especially on controlling epicenter distribution and focal depth are improved obviously after accurate relocation. It also could explain the seismic origin more reasonably and achieve the purpose of fine positioning.