紫坪铺水库地区尾波Q_C值研究  

Coda Wave Q_C Values in the Zipingpu Reservoir Area,Sichuan Province

作　　者：周连庆[1] 赵翠萍[1] 陈章立[2] 

机构地区：[1]中国地震局地震预测研究所,北京100036 [2]中国地震局,北京100036

出　　处：《地震》2009年第4期44-51,共8页Earthquake

基　　金：国家科技支撑项目(2006BAC01B04-02-01)

摘　　要：利用Sato模型研究了汶川MS8.0地震前位于震源区的紫坪铺水库地区尾波QC值特征。结果表明,库区QC值与频率有很强的依赖关系,4个台站的平均QC=21.6f1.211,尾波Q0值较小,平均为21.6。离震群最近的MZP台Q0最大,为29.0,离震群最远的BAJ台Q0最小,为13.9。这种尾波Q0值的差别可能与尾波Q值所反映的介质深度存在一定的关系,而较小的流逝时间可能是这里η值偏高的原因之一。Using Sato model, this article studied the characteristics of coda wave Q values varied with time near the Zipingpu reservoir located at the hypocenter region of the 2008 Wenchuan MsS. 0 earthquake. The results show that Q0 of coda waves recorded by the 4 stations near the Zipingpu reservoir is relatively small and η is relatively big. Q0 of the MZP station which is the nearest station to the earthquake swarm is the biggest, and has a value of 29.0. On the other hand, Q0 of the BAJ station which is the farthest station to the earthquake swarm is the smallest, and has a value of only 13.9. The difference of Q0 can be attributed to the medium＇s depth reflected by the coda wave Q values and small elapse time could be one of the reason for the relatively big ηvalue.

关 键 词：紫坪铺水库 尾波QC值 汶川地震 

分 类 号：P315.7[天文地球—地震学]