地电阻率各向异性前兆异常特征及其与地震的关系

英文篇名：The Research of Precursor Anomaly Characteristic of Ground Resistivity Anisotropy and Its Physical Mechanism in Earthquake
中文刊名：华南地震
英文刊名：South China Journal of Seismology
作者：邓柏昌 ; 魏焕 ; 于立业 ; 马寇聪 ; 王晓纯
英文作者：DENG BaiChang~1 WEI Huan~2 YU Liye~3 MA Koucong~1 WANG Xiaochun~1 TANG Ming~1 (1.College of Physical Science and Tech. ; South China Univ.of Tech. ; Guangzhou 510640 ; China ; 2.Earthquake Administration of Shandong Province ; Jinan 250014 ; China ; 3.Earthquake Administration of Longkou ; Longkou 250014 ; China)
中文关键词：地电阻率各向异性值s ; 前兆异常 ; 地应力
英文关键词：The value s of ground resistivity anisotropy ; Precursor Anomaly ; Earthquake compression stress
出版日期：2007-03-15
机构：华南理工大学物理科学与技术学院,山东省地震局,山东省龙口市地震局,华南理工大学物理科学与技术学院,华南理工大学物理科学与技术学院广东广州510641,山东济南250014,山东龙口250014,广东广州510641,广东广州510641
年：2007
期：01
出版单位：华南地震

摘要

在对山东菏泽和郯城两台站提供的地震地电阻率观测资料进行必要处理的基础上,研究了地震地电阻率各向异性的前兆异常特征,得出两台站周围300 km内的5级以上地震发生前均存在明显的地电阻率各向异性前兆异常;并发现在中强地震发生时地电阻率各向异性值变化都基本处于高值附近的一个区间内,即地电阻率各向异性变化存在一个易发震区间;并从地震发生时地应力的角度讨论了易发震变化区间的物理机理。
The precursor abnormal characteristic of ground resistivity anisotropy is studied based on the data provided by Hezhe and Yancheng seismostations.The results indicate there were the distinct precursor anomalies of ground resistivity anisotropy before the above 5 magnitude earthquakes occurred within the range of 300 km of both of the seismostations.We also find that the value of anisotropy was in a stable variation range near the high value when the moderate-strong earthquakes occurred.That is,there is a variation range of ground resistivity anisotropy in which earthquake would happen likely.The physical mechanism of this range is discussed in this paper.

引文

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