GIS-BASED STUDY ON THE RELATIONSHIP BETWEEN EARTHQUAKES AND ACTIVE FAULTS IN SHANGHAI AND ITS ADJACENT OFFSHORE REGION, EAST CHINA

作者：WUNingfen,ZHOUZuyi,LAOQiuyuan,LIUChangsen

摘要：The relation between earthquakes and active faults in Shanghai and its adjacent offshore region is quantitatively evaluated using GIS-based buffer and overlay analysis techniques. Statistics on the distance from the epicenter of an earthquake to its nearest active fault suggest that most earthquakes in the study area occurred within 10 to 20 km of major active faults. The strikes of active faults have significant influences on the occurrence of earthquakes. The NE-NNE-striked faults are less active than NW-NNW- or EW-striked faults.Along the NW-NNW- or EW-striked faults, the frequency of earthquakes is much higher than that along NE-NNE-striked faults. The time of fault activity has some degree of influence on the earthquakes. The newer the faults, the higher the frequency of earthquakes within the zone of the faults.

发文机构：LaboratoryofMarineGeology SeismologicalBureauofShanghai

关键词：地震活性断层地理信息系统上海覆盖区域earthquakeactive faultbuffer analysisoverlay analysisGISShanghai

分类号： P315.2[天文地球—地震学][天文地球—固体地球物理学][天文地球—地球物理学]