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.

發文機構：LaboratoryofMarineGeology SeismologicalBureauofShanghai

關鍵詞：地震活性斷層地理信息系統上海覆蓋區域earthquakeactive faultbuffer analysisoverlay analysisGISShanghai

分類號： P315.2[天文地球—地震學][天文地球—固體地球物理學][天文地球—地球物理學]