文章摘要

文章信息/Info

Author(s):: WU Yan-qiang¹; JIANG Zai-sen¹; YANG Guo-hua²; (1.Institute of Earthquake Prediction,CEA,Beijing 100036,China)(2.First Crustal Monitoring and Application Center,CEA,Tianjin 300180,China)

Keywords:: block movement; GPS; rigid movement; strain contribution deformation; irregular deformation; earthquake genesis

摘要:: 利用GPS时间序列对块体运动的信息进行了分离,发现块体的刚性运动、应变贡献部分变形和非规则变形所占的比重有明显差异,其中第一部分比重最大,其余两部分比重相当。从与地震孕育关系的角度看,后两部分与地震孕育的联系更紧密一些,它们反映了地震孕育过程的能量积累和震前的快速形变。最后,利用BJFS,BJSH,JIXN和KC014个GPS连续站数据计算了不同部分的信息分离结果,并分析了2006年河北文安5.1级地震前块体的变形特征。

Abstract:: We divide the spatial information of the movement of the blocks into rigid movement,strain contribution deformation and irregular deformation.The rigid movement takes the largest portion.The strain deformation and the irregular deformation are equally small portions.And they are relative to the genesis of the earthquake because they reflect the energy accumulation and fast deformation of the crust before the occurrence of the earthquake.Finally,we use the data from BJFS,BJSH,JIXN and KC01 station to calculate different part information,and then discuss the deformation characteristics before M5.1 Wen'an,Hebei earthquake in 2006.