乌什地震台钻孔应变震前异常特征  

CHARACTERISTICS OF BOREHOLE STRAIN ANOMALIES IN WUSHI BEFORE EARTHQUAKES

作　　者：潘振生[1] 徐衍刚[1] 赖爱京[1] 

机构地区：[1]新疆维吾尔自治区地震局阿克苏中心地震台,新疆阿克苏843000

出　　处：《内陆地震》2015年第1期43-49,共7页Inland Earthquake

摘　　要：新疆乌什地震台分量式钻孔应变观测以来,300 km范围内的2次6级地震和150 km区域内的1次5级地震前,存在较为显著的短期异常。异常特征表现为震前15~24天,4个分量中的两个或两个以上分量张应变或压应变速率同时增大,加速变化后期或结束后7天内发震;震前应变加速且反向,震后应变方向恢复;震前张、压加速应变交替变化。还对乌什钻孔应变与水位观测震前异常变化形态进行了对比分析。There were short-term anomalies of borehole strain in Wushi station before earthquakes with MS5. 0 to 6. 0 which epicenter under 300 km. The anomalies usually appeared fifteen to twenty four days before earthquakes while the strain release velocity of more than two directions becoming larger at the same time but quickly back to normal after earthquakes. The tensile strain and compressive strain changed alternative. They also making comparison analysis on borehole strain and water level anomalies.

关 键 词：地震预报 钻孔应变 异常特征 新疆 

分 类 号：P315.7[天文地球—地震学]