大同—阳高6.1级地震的地电前兆研究
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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.
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.
引文
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[3] 许绍燮,王琳瑛,刘玉芬. 大同—阳高中强震群前后的地震活动性[J].地震,1990,4(4):1-4.
[4] 高忠宁,蒋成恩,戴梁焕,等. 大同—阳高6.1 级地震断层位移测量前兆异常特征[J].地震,1990,4(4):70-73.
[5] 朱传镇,王琳瑛,林邦慧.大同—阳高地震序列特征[A].国家地震局科技监测司. 大同—阳高地震研究[C],北京:地震出版社,1993.14-15.
[6] 张国民,傅征祥.由岩体失稳讨论地震前兆的复杂性[J].地震研究,1990(3):220-221.
[2] 钱家栋,陈有发,金安忠. 地电阻率在地震预报中的应用[M].北京:地震出版社,1985.112-116.
[3] 许绍燮,王琳瑛,刘玉芬. 大同—阳高中强震群前后的地震活动性[J].地震,1990,4(4):1-4.
[4] 高忠宁,蒋成恩,戴梁焕,等. 大同—阳高6.1 级地震断层位移测量前兆异常特征[J].地震,1990,4(4):70-73.
[5] 朱传镇,王琳瑛,林邦慧.大同—阳高地震序列特征[A].国家地震局科技监测司. 大同—阳高地震研究[C],北京:地震出版社,1993.14-15.
[6] 张国民,傅征祥.由岩体失稳讨论地震前兆的复杂性[J].地震研究,1990(3):220-221.
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