利用SH波和P波振幅比测定中小地震的震源机制  

Determination of Focal Mechanism by Using SH and P Wave Amplitude Ratio

作　　者：杨选 康英 林伟 

机构地区：[1]广东省地震,广东广州510070

出　　处：《华南地震》2006年第3期83-90,共8页South China Journal of Seismology

基　　金：广东省地震局青年基金资助项目(1527-213);广东省科技计划项目重点项目(2005B32601003)资助

摘　　要：用SH波和P波振幅比测定地震震源机制具有诸多优点,但它对台站布局要求较高。通过适当处理资料,降低该方法对台站分布的依赖程度,用此方法测定了几个地震的震源机制解并与其它方法得出的震源机制解进行了分析对比,结果表明,这样处理是可行的,一般只要有5个以上台站(震中距<120 km)记录到的地震都可以反演出较合理的震源机制解。It has many advantages to determine the focal mechanism by using SH and P wave amplitude ratio, but requires highly for the distribution of stations. The dependence on the station＇s distribution would be decreased by dealing properly with the data. The result shows that the method is doable by analyzing and comparing with several focal mechanisms of earthquakes. Generally, the focal mechanism of the earthquake recorded by at least 5 seismostations （epicentral distance 〈120 km） can be inverted logically.

关 键 词：SH/P振幅比 测定 震源机制 

分 类 号：P315.33[天文地球—地震学]