地电阻率观测常见变化形态及其可能原因分析

Variations of Apparent Resistivity and Its Possible Causes

摘要:

地电阻率连续观测中常见的变化形态有长趋势变化、年变、日变化、阶跃、高频扰动、快速下降/上升、年尺度持续性下降/上升变化等形态,且多种形态通常相互叠加在一起,构成观测曲线复杂的变化形态。本文结合地电阻率观测基本原理、地电学科多年的研究成果和异常核实工作,尝试对地电阻率观测中常见变化形态可能的产生原因进行分析和总结,以期为异常分析和震情跟踪提供一定的参考。

Abstract:

The common changes in the continuous observation of the apparent resistivity observation includes annual change,daily change,step,high frequency disturbance,quick drop/rise,annual persistent decrease/rise change and etc. Variety of vibration forms often overlay together constituting a complex variation shape in the observation curve. Tin this paper we analyze and summarize the possible causes of usual variations in the apparent resistivity observations,by combining the basic principle of apparent resistivity observation,the results from theoretical researches and experiments,and anomaly verification work of geoelectrical disciplines,in order to provide a reference for the abnormal analysis and earthquake tracking.