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地震 ›› 2003, Vol. 23 ›› Issue (3): 131-136.

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电阻率测深在地电异常判定中的应用

田山1, 郑文俊1, 刘允秀1, 关华平2   

  1. 1.天津市地震局, 天津 300201;
    2.中国地震局分析预报中心, 北京 100036
  • 收稿日期:2003-01-07 修回日期:2003-03-16 出版日期:2003-07-31 发布日期:2021-12-21
  • 作者简介:田山(1952-), 男, 天津人, 高级工程师, 主要从事地震分析预报及电磁学预报方法等研究。

Application of geoelectric resistivity sounding in abnormity determinant

TIAN Shan1, ZHENG Wen-jun1, LIU Yun-xiu1, GUAN Hua-ping2   

  1. 1. Seismologi cal Bureau of Tianjin Municipality, Tianjin 300201;
    2. Center f or Analysis and Prediction, CSB, Beijing 100036, China
  • Received:2003-01-07 Revised:2003-03-16 Online:2003-07-31 Published:2021-12-21

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摘要： 塘沽台NS 方向地电阻率观测值在观测极距缩短后出现大幅度上升变化, 为了判断此变化的性质及其产生的可能原因, 开展了多次恢复原极距的对比观测。并依据该台已有的电测深资料, 对此变化进行了最佳拟合的理论反演计算。经比测及反、正演计算结果分析, 认为该台NS 方向大幅度的上升变化其主要原因与台站观测极距缩短有关, 可能是随观测极距的缩短,受浅部电性结构层影响增大, 而与深部电性结构无关, 因而这一变化不具有震兆意义。

关键词: 电阻率测深, 异常判定, 反、正演计算

Abstract: Resistivity in the North-south direction at Tanggu station increased obviously after the measuring space was shortened.In order to further understand the variation causes, the resistivity was contrasted to the original spacing for several times and was analyzed by using forward calculation and inverse explanation.The result shows that the resistivity variation was related to the shortening of spacing.The affection of near-surface layer to geoelectric resistivity measurement was increased and the affection of deeper layer was decreased with the shortening of spacing.However, the resistivity variation due to the shortening of spacing is not associated with earthquake precursor.

Key words: Resistivity sounding, Abnormity determinant, Forward calculating and inversion explaining

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