成组活动强震跨断层形变前兆相似性特征  

Similarity characteristics of cross-fault geodetic deformation associated with strong earthquakes in group activity

作　　者：车兆宏[1] 范燕[1] 

机构地区：[1]中国地震局综合观测中心,北京100039

出　　处：《地震》2000年第z1期38-43,共6页Earthquake

摘　　要：分析大同及张北地震前后跨断层流动形变资料 ,结果表明 ,成组活动强震中各次强震在特定构造部位具有相似的断层活动前兆异常 ,反映成组活动强震的孕育过程具有统一性 ;断层活动前兆异常的阶段性 ,反映了震源区能量的集中、释放过程 ;前兆异常的跟踪监测与对比分析 ,在震情预测中有重要作用。We have analyzed the cross-fault mobile geodetic deformation data befo re and after the Datong and Zhangbei earthquakes. The results indicate that each strong earthquake in group activity has similar precursory anomaly of fault mov ement in specific tectonic sites. The process of earthquake preparation of stron g earthquakes in group activity is of unity. The phase of precursory anomaly of fault movement reflects the process of energy centralization and liberation. The trace monitoring and comparative analysis of precursory anomaly is of great sig nificance in seismic regime prediction.

关 键 词：成组活动 前兆特征 跨断层形变 大同地震 张北地 震 

分 类 号：P315[天文地球—地震学]