新疆强震前地震活动增强研究  

Research on seismicity increasing before strong earthquake in Xinjiang

作　　者：王筱荣[1] 

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011

出　　处：《华南地震》2005年第1期17-23,共7页South China Journal of Seismology

基　　金：中国地震局"十五"课题01-01-03部份成果。

摘　　要：系统研究了1970～2002年新疆天山30次中强震前地震增强现象,发现较大地震发生前中等地震的增强现象较为普遍;南北天山地震带增强区与后续主震震中相关性较好;除北天山地震带外,仅以地震增强现象作为地震中短期预测指标准确率太低;以增强发生后是否有平静现象发生作为确定短临异常的标准,预报效率可以提高。Research on seismicity increasing before 30 mid-strong earthquakes from 1970 to 2002 in Tianshan mountain in Xinjiang shows that it is common for activity of moderate earthquakes to increase before stronger events. There is good relation between the increasing region of seismic belt of southern and northern Tianshan mountain and the epicenters of sequent mainshocks. It is less accurate only to take seismicity increasing as the prediction index of mid-short term earthquakes except in the seismic belt of northern Tianshan Mountain. The prediction efficiency will be improved if taking quiescence after earthquake increasing as a criterion to distinguish the short-impending anomaly.

关 键 词：短临异常 地震活动增强 新疆强震 中短期预报 

分 类 号：P315.75[天文地球—地震学]