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《Progress in Geophysics》 2009-01
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Hypocenter relocation in central and southern Jiangsu province and adjacent areas,China and its application to fault research

LIU Jian-da1,LI Qing-he1,ZHANG Yuan-sheng2,JIN Shu-mei1(1.Earthquake Administration of Jiangsu Province,Nanjing 210014,China;2.Lanzhou Institute of Seismology,Lanzhou 730000,China)  
The advantage and disadvantage of Double-Difference(DD) technique and Joint Hypocentral Determination(JHD) technique to locate earthquakes are analyzed.Combining above two methods and applying the Genetic Algorithm(GA) to optimization,we relocated the hypocenters in central and southern Jiangsu province and adjacent areas(29°~34°N,117.5°~122.5°E) in East China.Firstly,we used GA for inversion to get crustal structure of the research area,then using DD to get precise relative locations for 58% original events,and last 42% events were located by GA.The relationship between events and the faults,the correlation of focus-depth and fault of Liyang M6.0 earthquake,southern Yellow Sea M6.2 earthquake,Changshu-Taicang M5.1 earthquake are discussed,the feature of focus-depth of the Changshu-Zhangjiagang swarm is analysed.
【Fund】: 国家自然科学基金项目(40374033);; 无锡市政府社会发展项目“无锡市基底构造探测”联合资助
【CateGory Index】: P315.2
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