2008年5月12日汶川地震谱震级及相关问题研究(英文)  

Spectral Magnitudes of the Sichuan,China,Earthquake of 12 May 2008,and Related Problems

作　　者：Seweryn J.Duda Jaromir Jansky 

机构地区：[1]Institut für Geophysik, Universitt Hamburg,Bundesstrasse 55, 20146 Hamburg, Germany [2]Department of Geophysics, Charles University,Ke Karlovu 3, 121 16 Praha 2, Czech Republic

出　　处：《CT理论与应用研究（中英文）》2009年第2期15-23,共9页Computerized Tomography Theory and Applications

基　　金：Grants GACR 205/07/0502 ;MSM 0021620860 of the Czech Republic

摘　　要：基于P波和S波的谱震级特征对汶川地震进行了定量研究,可以看出P波和S波的最大谱震级出现在不同的周期上。对这一现象的构造物理意义进行了讨论,推测相对于P波而言,地震发生期间辐射的S波能量来自异常大的震源体积。选择部分全球地震的谱特征为背景,对汶川地震的体波谱震级特征进行了分析,结论是汶川地震的特征与其所处的周边环境是一致的。The Sichuan earthquake is quantified on the basis of its spectral magnitudes of the P- and of the S-waves. The maximum spectral magnitudes of the two waves are seen to occur at different periods The tectonopbysical significance of the finding is discussed, and it is deduced from it that the S-wave energy radiated during the earthquake was drawn from unusually large volume, if compared to the volume corresponding to the P-waves. The spectral features of the body waves of the Sichuan earthquake are analysed on the background of the spectral features of a selection of worldwide earthquakes. As a result it is concluded that the Sichuan earthquake fits well into the features of the earthquakes in the surrounding regions.

关 键 词：汶川地震 谱震级 地震体积 地震定量化 

分 类 号：P315.3[天文地球—地震学]