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目前,用于地震预报的地电阻率资料,除少部分台站外,多数资料的年变幅值都在l％以上,个别台站的年变幅值可达20％。这么大的年变幅值给正确判断震前长、中、短、临异常带来极大困难。因此,在地震预报工作中研究无震情况下的地电阻率年变规律,以及如何利用有年变化的地电资料预报地震是非常重要的。 本文总结了无震情况下地电阻率资料年变形态的一般规律和怎样从有年变化的地电资料中分析真正的地震异常。
At present, the earth resistivity data used for earthquake prediction, with the exception of a few stations, the annual amplitude of most data is above 1%, and the annual amplitude of individual stations can reach 20%. Such a large annual amplitude to the correct judgment of the earthquake before the middle, short, temporary abnormalities bring great difficulties. Therefore, it is very important to study the annual variation law of geo-resistivity in the earthquake prediction work and how to use the geoelectric data with annual variation to predict the earthquake. This paper summarizes the general laws of earth resistivity data under earthquake-free conditions and how to analyze the real seismic anomalies from geoelectric data with annual changes.