| GIS-BASED STUDY ON THE RELATIONSHIP BETWEEN EARTHQUAKES AND ACTIVE FAULTS IN SHANGHAI AND ITS ADJACENT OFFSHORE REGION, EAST CHINA |
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| 作者姓名： | WUNingfen ZHOUZuyi LAOQiuyuan LIUChangsen |
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| 作者单位： | [1]LaboratoryofMarineGeology,TongjiUniversity,Shanghai200092,China [2]SeismologicalBureauofShanghai,Shanghai200062,China |
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| 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 are aoccurred 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.
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| 关 键 词： | 地震 活性断层 地理信息系统 上海 覆盖区域 |
GIS-BASED STUDY ON THE RELATIONSHIP BETWEEN EARTHQUAKES AND ACTIVE FAULTS IN SHANGHAI AND ITS ADJACENT OFFSHORE REGION,EAST CHINA |
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| WUNingfen ZHOUZuyi LAOQiuyuan LIUChangsen.GIS-BASED STUDY ON THE RELATIONSHIP BETWEEN EARTHQUAKES AND ACTIVE FAULTS IN SHANGHAI AND ITS ADJACENT OFFSHORE REGION, EAST CHINA[J].Geotectonicaet Metallogenia,2005,29(1):34-43. |
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| Authors: | Wu Ningfen ZHOU Zuyi LAO Qiuyuan Liu Changsen |
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| Abstract: | 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. |
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| Keywords: | earthquake active fault buffer analysis overlay analysis GIS Shanghai |
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