• 责任者：Dong Chunli (Earthquake Administration of Shanxi Province ; Taiyuan 030021 ; China) ; Li Le
• 刊名：Seismology and Geology
• 出版年：2013
• 卷期：35(4)
• 关键词：小震 ; small seisms ; 地震定位 ; seismic location ; 山西 ; Shanxi Province
• 页码：p.873-886
• 图表：7 illus., 2 tables, 36 refs.
• 分类号：0500
• issnNo：ISSN0253-4967
• isbnNo：CN11-2192/P

     In the paper,we relocate the small earthquakes occurring in Linfen region from 1981 to 2010 by using the double-difference earthquake location algorithm.Our result shows that the distribution of relocated earthquakes is characterized by cluster activities,and most of the them occurred at the depths of 5 ～ 11 km and 15 ～27km,which suggests that the two main seismogenic layers in this region are located in the upper and mid-upper crust.Earthquake frequency is high along both sides of the Subu Fault zone in the northern Linfen Basin,and most of the earthquakes in the north of Subu Fault zone are deeper than that in the south of Subu Fault.To some extent,this result indicates that the regional tectonic setting plays a major control role in the distribution of earthquakes.Analysis on the distribution of earthquake focal depths reveals that there exist deep faults which cut through the crust into the mantle in the middle of the Linfen Basin and connect with the active faults around the basin in the upper crust.The dislocations along the active faults on both sides of the basin are a reflex on the surface of faulting of the deep faults beneath the central basin.