地震的震源机制解的计算和分析

M≥3.5 Earthquake focal mechanism solution calculation and analysis since 2008 in Qinghai Dachaidan region

本文根据大柴旦周围40余个地震监测台站记录到的P波初动及部分S波初动等信息计算了2008年以来大柴旦50余次M3.5级以上的地震,其中合理的得出了46个震源机制解,通过与哈佛给出的结果分析了两次6级地震震源机制解的可靠性,同时讨论了中小震的震源机制解特性,并对区域的应力场进行了估算,得到了较为合理的结果,为该区域的地震研究提供一定参考.

In this paper, according about 40 seismic monitoring stations＇ recorded around Dachaidan of Qinghai provice, Use P wave first motion and part of S wave first motion information to calculate the focal mechanism solution. Collected 50 times M≥3. 5 since 2008 of Dachaidan region, but only get 46 reasonably focal mechanism solutions, compared with Harvard＇s solution by two M≥6, the results that our focal mechanism solutions is reliability. So use the mechanism solutions of we have calculated to discuss the characteristics, and estimate the region stress field, and got a series of reasonable results, provide meaningful reference to study the region.