江苏省地电阻率年变化及其差异性探讨

DISCUSSION ON THE ANNUAL VARIATION FEATURES AND DIFFERENCE OF APPARENT RESISTIVITY IN JIANGSU PROVINCE

以江苏省江宁地震台、新沂地震台和海安地震台为例,归纳了江苏省地电阻率年变化特征的类型,并对地电阻率年变化差异性的原因做了探讨。通过反演计算指出地电阻率年变化差异性的原因主要是由各观测场地地下电性结构造成的,分析这种不同有益于解决在场地选择中如何得到一个规则年变的场地,以便更好地服务于地震预报的数据处理。

Analysis on the annual variation features of apparent resistivity of Jiangning seismic station, Xinyi seismic station and Hal＇ an seismic station in Jiangsu province. Analysis on the reason of its difference.Show that： （1） The same in different stations on the annual variation of earth resistivity morphological complexity and diversity, both rules cycle type, and have irregular cycles, and random type; （2） The main reason of the annual variation difference of apparent resistivity is apparent resistivity observation site of underground structure and different influence factors in different surface, surface effects factors of surface water, the impact is more prominent.Point out that the apparent resistivity observation site of electrical sounding test as well as the importance of the rule changes contribute to seismic precursor information extraction.