易县地震台形变资料对汶川8.0级大地震的反应  

The Response of Crustal Deformation Data in Yixian Seismic Station to Wenchuan M8.0 Earthquake

作　　者：苏树朋[1] 李津津[2] 张勤 杨素卿[1] 宋志刚[1] 

机构地区：[1]河北省地震局保定中心台,河北保定071000 [2]河北省地震局,河北石家庄050022 [3]云南省勐腊县地震局,云南勐腊666300

出　　处：《华北地震科学》2009年第2期54-58,共5页North China Earthquake Sciences

基　　金：国家科技支撑计划子专题(2006BAC01B02-02-05)

摘　　要：运用易县地震台数字化形变观测资料分析汶川8.0级地震时出现的同震形变响应和震前一些测项的异常变化。各手段出现的地震扰动、同震阶跃具有共同特征,反映了当地应变场在地震影响下产生的波动及调整过程;部分测项震前出现的异常变化与地震发生时间较为吻合,可能包含一定的前兆信息。Coseismic deformation responses of Wenchuan M8.0 earthquake and anomalies from some observations before the earthquake are analyzed with the digital deformation data in Yixian Sei.smostation. Seismic disturbance and coseistnic step of all observation items have some common characteristics, which reflects the the fluctuation and adjustment process of local strain field under the influence of the earthquake. Anomalies of some observation items before the earthquake, which is consistent relatively well with the time of the earthquake, may include some precursory information.

关 键 词：汶川地震 形变观测 同震响应 前兆异常 

分 类 号：P315.72[天文地球—地震学]