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地震 ›› 2007, Vol. 27 ›› Issue (增刊): 35-42.

• 地电阻率研究 • 上一篇    下一篇

地震地电阻率多方位观测的必要性

马占虎1,2, 杜学彬1,2, 李宁1,2, 叶青1,2, 谭大诚1,2, 陈军营1,2   

  1. 1.中国地震局地震预测研究所兰州科技创新基地, 甘肃 兰州 730000;
    2.中国地震局兰州地震研究所, 甘肃 兰州 730000
  • 收稿日期:2006-06-09 修回日期:2006-07-08 出版日期:2007-06-30 发布日期:2021-10-29
  • 作者简介:马占虎(1978-), 男, 回族, 宁夏海原人, 2003年获硕士学位, 主要从事地震电磁及前兆等研究
  • 基金资助:
    国家科技基础重点项目(2004DEA71000); 中国地震局兰州地震研究所科技论著编号(LC20060019)

On necessity of seismic earth resistivity multi- orientation observation

MA Zhan-hu1,2, DU Xue-bin1,2, LI Ning1,2, YE Qing1,2, TAN Da-cheng1,2, CHEN Jun-ying1,2   

  1. 1. Lanzhou Base of Institute of Earthquake Science, CEA, Lanzhou 730000;
    2. Lanzhou Institute of Seismology, CEA, Lanzhou 730000, China
  • Received:2006-06-09 Revised:2006-07-08 Online:2007-06-30 Published:2021-10-29

摘要: 利用归一化月速率方法研究了国内现运行的地电阻率观测台站不同测道反映地震前兆的差异, 从地电阻率各向异性机理方面进行了理论解释, 同时介绍了地电阻率多方位观测在地震预报以及主应力状态反演中的应用。 得到以下结果: ① 中国现行的地震地电阻率多方位观测确实检测到了与孕震有关的电阻率变化, 多方位观测是捕捉地震地电阻率前兆信息的最佳布极方式, 对近场地震和远场地震均有较好的映震能力; ② 运用近震中区地电阻率多方位观测结果, 可以认识和了解强地震孕育过程的中短期至短临阶段震源区及附近地壳介质的应力状态及其动态过程。

关键词: 地震前兆, 地电阻率, 各向异性, 多方位观测, 映震能力

Abstract: The difference of earthquake precursors reflected on different survey line at earth resistivity stations now operating in China is studied by uing the normalized monthly rate method and theoretically explained by means of earth resistivity anisotropy mechanism. Meanwhile, the application of earth resistivity multi-orientation observation in earthquake prediction and principal stress state reversion is introduced. The following results are gained: First, the earth resistivity multi-orientation observation now operating in China can indeed detect the resistivity variations which have connection with earthquake preparation, the multi-orientation observation is the best moment setting mode to catch the preursor information, which have good earthquake-reflecting ability both for near-field and far-field earthquakes. Second, the stress state and dynamic process in epicenter and its vicinal region during the middle-short term to short-impending term of earthquake preparation process can be realized by using earth resistivity multi-orientation observation data.

Key words: Earthquake precursor, Earth resistivity, Anisotropy, Multi-orientation observation, Earthquake-reflecting ability

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