地震学报2017，Vol.39Issue(4)：495-505,11.DOI:10.11939/jass.2017.04.005
地电阻率长趋势变化及其预测意义
Long-term trending variation of georesistivity and its implication to earthquake prediction
摘要
Abstract
The trend variations in the earth-resistivity over one year scale are observed in large quantities.This trend variation is regional and synchronous.In order to study this phenomenon,this paper analyzes the reasons for the trend variation of resistivity from the view points of the relationship between water level and ground resistivity,and between ground level and resistivity,as well as the earth tide phenomenon of ground resistivity through the theory,experiment and example analysis.It is considered that the trend variation is independent of the observation system or the water level (non-tectonic water level),but relate to structural change.The rising and falling trend respectively reflect the compressional and extensional variation of stress field around.Furthermore,taking the stations Gaoyou and Chengdu as examples,the characteristics of the resistivity trend are analyzed based on the relationship between the surrounding earthquakes and the resistivity.The result shows that the uptrend turning has short-term predictive implication,which can provide a reference for the research on the long-term trend of resistivity.The future earthquake prediction needs to be integrated with the observation results of each station,which can effectively determine the direction and the relative amplitude of regional stress field,so as to give some significant results of earthquake precursor and prediction.关键词
地电阻率/趋势变化/应力场/地震预测Key words
georesistivity/trend variation/stress field/earthquake prediction分类
天文与地球科学引用本文复制引用
沈红会,王丽,王维,李鸿宇,孙春仙,叶碧文..地电阻率长趋势变化及其预测意义[J].地震学报,2017,39(4):495-505,11.基金项目
中国地震局震情任务跟踪重点项目(1530503)资助. （1530503）
