两种方法所定震源深度的对比分析

Comparative Analysis of Two Methods for Determining Focal Depth of Earthquakes

选取山西数字地震台网2002年至2006年间4个及其以上台记录的80个震相清晰的地震事件,对利用石川交切法与HYP 081盖格法所定震源深度进行了对比,得出二者结果基本吻合,数字HYP 081盖格法所定震源深度是准确可信的结论。这一结论对于用该值进行如发生震群、大震的迁移等反映震源点深部信息的相关方面的研究有重要的作用。

For selected 80 seismic events which phases are clear and each one is recorded by at least 4 stations of Shanxi Digital Seismic Network from 2002 to 2006, intersection of Ishikawa＇s method and program HYP081 of Geiger＇s method is applied respectively to them to determine focal depth of them. The results are basically consistent with each other, so that we think that focal depth pa- rameters determined by program HYP081 of Geiger method are credible. This conclusion is important as these focal depth results are used in the studies such as earthquake swarm and the migration of earthquake which reflects deep focal points information.