利用大地电磁测深法识别EDA地震电性变化前兆  

USING MTS TO DISTINGUISH THE EARTHQUAKEPRECURSOR OF EDA ELECTRICAL CHANGES

作　　者：林长佑[1] 武玉霞[1] 杨长福[1] 陈军营[1] 

机构地区：[1]国家地震局兰州地震研究所

出　　处：《西北地震学报》1995年第4期89-98,共10页Northwestern Seismological Journal

摘　　要：论述了起因于ＥＤＡ现象的地球介质电导率各向异性特征，分析研究了地球介质电导率各向异性变化引起的大地电磁响应函数变化形态特征，简述了大地电磁测深法对ＥＤＡ电性变化前兆的可识别性及大地电磁资料解释中考虑电导率各向异性的必要性，研究了对称各向异性层状介质大地电磁资料的反演问题。The characteristics of conductivity anisotropy of earth medium due to EDA phenomena were demonstrated,tha pattern and characteristics of MT response function variations caused by the cbanges of conductivityanisotropy were analysed and studied, the distinguishability of MTS to the earthquake precursor of EDA electricalchanges and the necessity of considering the anisotropy in the interpration of MT data were explained, and the.inverse problem of MT data for the symmetrically anisotropic layered medium was discussed.

关 键 词：地震前兆 大地电磁测深 电导率 各向异性 

分 类 号：P315.7[天文地球—地震学]