山西地震台站地电场变化特征及映震能力初探

Preliminary Study on Geoelectric Field Variation at Seismological Stations in Shanxi and Their Earthquake Reflecting Ability

从地质构造、日变形态、数据内在质量、干扰、映震能力方面对山西5个地电场台站进行综合分析,结果表明,山西5个地电场台站电场数据普遍受到雨雪、雷电、电磁暴的干扰,部分台站还受大风、农田灌溉干扰;多数台站数据表现为弱日变,与电极的稳定性、背景噪声、地下电性结构、季节有密切关系;各地电场台站自观测以来映震能力普遍不好。

A comprehensive analysis for 5 geoelectric field stations in Shanxi is made, from aspects of geological structure, diurnal variation, the intrinsic quality of the data, interference and earthquake reflecting ability. The results show that the observations of five geoelectric field stations in Shanxi are generally disturbed by rain, snow, thunder and lightning , electromagnetic interference storm and in addition, some of the stations are also affected by strong winds, farmland Irrigation interference. The data of most stations show a weak diurnal variation, which is closely related to stability of the electrode, the background noise, underground electrical structure and season. The conclusion is that earthquake reflecting abilities of all these geoelectric field stations have been being poor since they began to run.