强震前地电阻率短期异常特征与识别标志研究  

The research on recognizing symbol and short-term abnormal characteristic of geoelectrical resistivity before the strong earthquake

作　　者：田山[1] 吴国有[1] 关华平[2] 刘允秀[1] 

机构地区：[1]天津市地震局,中国天津300201 [2]中国地震局分析预报中心,中国北京100036

出　　处：《地震地磁观测与研究》2003年第6期72-78,共7页Seismological and Geomagnetic Observation and Research

基　　金：国家科技攻关计划项目<强地震短期预测技术研究>子专题"强震前电磁短期阶段异常演化特征与识别标志"研究成果之一;编号2001BA601B01-05-03

摘　　要：从地震信息“场”的概念出发,利用空间线性度方法,对强震近震源区的地电阻率观测资料进行组合计算,得到描述孕震过程中震源区附近新的前兆特征量——空间线性度。本文分析计算了华北地区发生的7次6级以上强震前的地电阻率观测资料,结果表明,强震前半年内震源区附近的空间线性度a有明显的下降异常变化。Based on the concept of field in seismic information, using the measure of the spatial linearity to observe and calculate the geoelectrical resistivity, we can find the premonitory characteristic value, spatial linearity short-term abnormal characteristic value (a ), which describes the earthquake source district in the course of earthquake pregnancy. By analyzing the data of geoelectrical resistivity in the seven times strong earthquakes above M6.0 previously happened in North China, we can conclude that the spatial linearity (a) will decline obviously in the earthquake source district before half a year of the strong earthquake.

关 键 词：地电阻率 空间线性度 短期异常 识别标志 强地震 

分 类 号：P315.72[天文地球—地震学]