Probabilistic seismic hazard analysis in Nepal

查看全文 作　　者：Thapa Dilli [1]Ram;Wang [1]Guoxin

机构地区：[1]State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology

出　　处：《Earthquake Engineering and Engineering Vibration》索引2013年第12卷第4期,共10页

基　　金：National Natural Science Foundation of China under Grant No.51121005 and Grant No.51378092 摘　　要：The seismic ground motion hazard for Nepal has been estimated using a probabilistic approach.A catalogue of earthquakes has been compiled for Nepal and the surrounding region(latitude 26°N and 31.7°N and longitude 79°E and 90°E)from 1255 to 2011.The distribution of catalogued earthquakes,together with available geological and tectonic information were used to delineate twenty-three seismic source zones in Nepal and the surrounding region.By using the seismic source information and probabilistic earthquake hazard parameters in conjunction with a selected ground motion prediction relationship,peak ground accelerations(PGAs)have been calculated at bedrock level with 63%,10%,and 2%probability of exceedance in 50 years.The estimated PGA values are in the range of 0.07–0.16 g,0.21–0.62 g,and 0.38–1.1 g for 63%,10%,and 2%probability of exceedance in 50 years,respectively.The resulting ground motion maps show different characteristics of PGA distribution,i.e.,high hazard in the far-western and eastern sections,and low hazard in southern Nepal.The quantified PGA values at bedrock level provide information for microzonation studies in different parts of the country. 关键词：概率地震危险性分析尼泊尔地震地面运动构造信息周边地区危险性预测峰值加速度 PGA

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Probabilistic seismic hazard analysis in Nepal

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