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华北地区中强地震前的地电阻率异常特征分析
The earth-resistivity anomaly characteristics analysis before the moderate earthquake in North China
【摘要】 用周期综合分析方法对华北地区1985年初~2002年底发生的5级以上地震进行研究。结果表明,华北地区中强地震前地电阻率异常均为负异常,异常时间为中长期时间尺度。地震发生在地电阻率异常曲线的下降、恢复过程中或恢复后。
【Abstract】 The earthquakes with magnitude M_S≥5 occurred in North China from 1985~2002 were studied in this paper with method of periodical synthesis analysis.The results indicate that the earth-resistivity anomaly characteristics in North China before the earthquake were all negative.The anomalous duration was long or medium.Earthquake often took place in the decrease,restoring or after restoring of the earth-resistivity curve.
【关键词】 地电阻率异常;
周期综合分析;
中强地震;
【Key words】 earth-resistivity anomaly; periodical synthesis analysis; moderate earthquake;
【Key words】 earth-resistivity anomaly; periodical synthesis analysis; moderate earthquake;
【基金】 北京市“十五”攻关科技合同项目,H030630090190“北京及邻区地震预测预报与近期地震危险性的综合判定研究”
- 【文献出处】 地震地磁观测与研究 ,Seismological and Geomagnetic Observation and Research , 编辑部邮箱 ,2005年02期
- 【分类号】P315.722
- 【被引频次】2
- 【下载频次】53