- 责任者：Zheng Guolei (Lanzhou Institute of Seismology ; China Earthquake Administration ; Lanzhou 730000 ; China) ; Du Xuebin
- 刊名：Acta Seismologica Sinica
- 出版年：2011
- 卷期：33(2)
- 关键词：活动断层 ; active faults ; 地震前兆 ; precursor ; 地电阻率 ; earth resistivity
- 页码：p.187-197
- 图表：illus., 1 table, 25 refs.
- 分类号：0500
- issnNo：ISSN0253-3782
- isbnNo：CN11-2021/P
In this paper, the authors studied the fault influence on the spatial distribution of geo-electric resistivity anomalies through analyzing typical cases of earthquake. Then, the strain distribution in a geologic body model with a fault is calculated using the elasto-plastic 2D finite element method, and the strain values are converted into the relative changes of geo-electric resistivity. This paper proposed a well explanation for the spatially non-uniform distribution of changes of geo-electric resistivity before an earthquake. According to the research result of this paper, the spatially non-uniform distribution of the moderate-term and imminent geo-electric resistivity anomalies around an earthquake source region is mainly caused by spatially non-uniform distribution of the underground medium deformations due to the active faults and different focal mechanisms.