摘要
在系统处理地电长期观测资料的基础上，研究了大同—阳高地震的地电前兆变化及大同台地电阻率反映的主压应力（变）方向。结果表明，大同—阳高地震地电前兆异常具有台项少、强度小和零散分布的特征，前兆异常似有由震中往外扩展的现象；大同台震前地电异常反映的主压应力（变）方向发生了４５．２°的明显异变。讨论了对地电地震前兆的复杂性和大同—阳高等中强地震的预报问题，认为只要认真排除干扰，系统分析处理地电的长期观测资料和正确认识异常变化，地电方法对一些中强地震作出一定程度的预测还是有可能的。
Based on systemmatic processing of long term geoelectric observation data, the geoelectric precursor variation of the Datong Yanggao Earthquake and the main compre ssion stress (strain) direction reflected with resistivity of Datong Seismic Station are discussed. The result indicates that the geoelectric precursor anomaly of Datong Seismic Station has the characters of fewer items, less intensity, and scattered distribution, and precursor anomaly seems to extend from epicenter to periphery. The main compression stress (strain) direction, which was reflected by resistivity of Datong Seismic Station, occurred 45.2 degree obvious variation. The complexity of geoelectric precursor and prediction of moderate strong earthquakes are discussed. It is thought that moderate strong earthquakes may be predicted with geoelectric method in some extent, so long as the interference is excluded seriously, long term geoelectric observation data is analyzed and processed systemically, and precursor variation is distinguished correctly.
出处
《山西地震》
1999年第3期21-24,共4页
Earthquake Research in Shanxi
关键词
地震前兆
地电变化
异常特征
地震预报
Earthquake precursor
Geoelectrical variation
Anomalous character
