Relocation of Small to Moderate Earthquakes in Shanxi Province and Its Relation to the Seismogenic Structures
详细信息   
摘要
Based on the phase reports of analog seismic stations from 1981~2001,and those of digital seismographs from 2002~2008, the authors relocated the small to moderate earthquakes with unprecedented precision by absolute and relative relocating methods. The results show that: 1) comparing with precious researches,the percentage of relocated earthquakes with horizontal locating error ≤5 km increases from 65.8% to 86.2%; 2) the general pattern of seismicity has no big changes in horizontal directions; 3) the distribution of relocated earthquakes can outline the profile of the lower seismogenic boundaries of the basins, as well as the boundaries between the extensional basins and the uplifted areas; and 4) there is a good correlation between the focal depths and the structures of the basin and range system. 
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