首都圈体应变信号震前突发性变化特征及在短期地震预测中的应用  

Borehole strain measurement in the Capital Circle Area and its anomalous changes shortly before earthquakes

作　　者：高福旺[1] 李丽[1] 韩凤银[1] 

机构地区：[1]中国地震局分析预报中心,北京100036

出　　处：《地震》2004年第1期88-95,共8页Earthquake

基　　金：国家自然基金项目(40234038)

摘　　要：通过对首都圈体应变台网观测资料及首都圈多个显著地震前临震异常的分析,结合岩石实验结果,将体应变临震异常划分为阶跃型、脉冲型、波动型三种类型。通过在首都圈地区体应变临震异常的识别实例,总结了在首都圈及北京地区识别体应变临震异常的方法。The anomalous strain changes at the borehole strain observation stations in the Capital Circle Area before some earthquakes are analyzed, which shows that the strain curves turned different with their ordinary shapes. The abnormal changes could be classified into 3 types, i.e., step type, pulse type and wave types. Some cases are shown in this paper for describing determination of the strain changes shortly before earthquakes, and some operable criteria to identify the strain precursors are listed.

关 键 词：体应变 台网观测 地震异常 地震预测 首都圈 

分 类 号：P315.727[天文地球—地震学]