使用SV/P,SH/P和SV/SH振幅比确定震源机制解  

Determining Focal Mechanic Solution by Using the Proportion of the Amplitude of SV/P,SH/P and SV/SH

作　　者：于海英[1] 朱元清[1] 郭育[1] 

机构地区：[1]上海市地震局地震信息技术研究所,上海200062

出　　处：《地震研究》2003年第4期355-360,共6页Journal of Seismological Research

摘　　要：为了准确确定地震的震源机制解 ,引入了用SV P ,SH P和SV SH振幅比修正使用P波、SV波和SH波极性所得到的震源机制解的方法 ,采用解析法在震源空间内寻找符合地震波观测极性和振幅比的解。该方法能够降低单纯使用初动极性确定震源机制解的不确定性 ,提高震源机制解的求解精度。In order to determine the focal mechanic solution accurately , the paper introduces a method with which the focal mechanic solution attained by using the polarity of P,SV and SH wave which can be corrected by using the proportion of the amplitude of SV/P,SH/P and SV/SH.Analytic method is used to search the solution agreeing to observed polarity and proportion of amplitude in focal space. This mechanic solution can reduce the degree of uncertainty of determining the focal machanic solution only with the polarity of first motion and improve the accuracy of result of focal mechanic solution.

关 键 词：振幅比 震源机制解 震源模式 初动极性 地震波 观测极性 

分 类 号：P315.3[天文地球—地震学]