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大地电磁在地震预报中的应用
引用本文:王书明,王家映,林长佑.大地电磁在地震预报中的应用[J].地质科技情报,2002,21(2):105-108.
作者姓名:王书明  王家映  林长佑
作者单位:1. 中国地质大学地球物理系,湖北,武汉,430074
2. 中国地震局兰州地震研究所,甘肃,兰州,730000
基金项目:中国地震局监测预报司课题
摘    要:论述了大地电磁(MT)地震前兆多参数综合分析方法和扩展膨胀各向异性(EDA)电性前兆识别。不同的MT参数以不用的形态特征和方式,从不同侧重面反映地球电导率结构特征,充分利用包含于各参数内的信息,对它们随时间的变化进行综合分析研究有利于更可靠地判断新出现的MT前兆。EDA电性前兆是由孕震期间深部原地应力场的变化引起的,可能出现在一个较大的地域范围内,因而该前光是一种具有很好应用前景的地震前兆,利用MT法进行监测较为有利。

关 键 词:地震预报  大地电磁  响应函数  电阻率  各向异性  地震前兆  MT法
文章编号:1000-7849(2002)02-0105-04
修稿时间:2001年6月20日

APPLICATION OF MAGNETOTELLURIC TO EARTHQUAKE PREDICATION
WANG Shu ming ,WANG Jia ying ,LIN Chang you.APPLICATION OF MAGNETOTELLURIC TO EARTHQUAKE PREDICATION[J].Geological Science and Technology Information,2002,21(2):105-108.
Authors:WANG Shu ming  WANG Jia ying  LIN Chang you
Institution:WANG Shu ming 1,WANG Jia ying 2,LIN Chang you 1
Abstract:The predication of earthquakes by using MT has definite physical mechanism,and international features.This paper discusses multiple parameters comprehensive analytical method about magnetotelluric(MT) earthquake precursor,and the electrical precursor of extensive dilatancy anisotropy(EDA).Different MT parameters inflect the conductivity structural characteristic of the earth in different features and ways from different sides.The utilization of the information included in every parameters,and comprehensively studing and analyzing their variations with time contributes to reliable judgment of the latest appearing MT precursor.While the electrical precursor of EDA is caused by the variations of deep in situ stress field in the development of earthquakes,which may appear in considerable extensive regions,so the deep electrical variations of EDA has a fairly good application prospect,and is thus beneficial for utilizing MT to monitor earthquake.
Keywords:magnetotelluric  reponse function  resistivity  anisotropy
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