| Characteristics of Collapses Caused by the M 8.1 Earthquake West of the Kunlun Mountains Pass |
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| 作者姓名： | Wang Zanjun Dang Guangming Tian Qinjian |
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| 作者单位： | [1]SeismologicalBureauofQinghaiProvince,Xining810001,China; [2]CenterforAnalysisandPrediction,ChinaSeismologicalBureau,Beijing100036,China |
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| 基金项目： | TheresearchwassupportedunderakeyScienceandTechnologyResearchProjectoftheScienceandTechnologyDepartmentofQinghaiProvince (2 0 0 2 N 14 1),China |
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| 摘 要： | An M 8.1 earthquake that occurred west of the Kunlun Mountains Pass has caused more than 20 collapse bodies or zones, which are mainly distributed near the surface seismic rupture zone, west of Hoh Sai Lake. The collapses are of four types, bedrock, soil mass and ice mass collapses and avalanches. The spatial distribution and the characteristics of development of the collapses are analyzed in the paper. Comparised with those caused by other earthquakes, the collapses are smaller in scale. In addition to the lithological characteristics of the crustal media, topographic, geomorphic and climatic factors, weaker seismic ground motion is an important cause for formation of the smaller-scale collapses. The long surface rupture zone and weaker ground motion are important features of the seismic rupture, which may be related to the structure of the preexisting fault.
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| 关 键 词： | 地震学 地震灾害 地震损失 昆仑山 地震断裂带 |
Characteristics of Collapses Caused by the M 8.1 Earthquake West of the Kunlun Mountains Pass |
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| Wang Zanjun,Dang Guangming,Tian Qinjian.Characteristics of Collapses Caused by the M 8.1 Earthquake West of the Kunlun Mountains Pass[J].Earthquake Research in China,2003,17(4):352-363. |
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| Authors: | Wang Zanjun Dang Guangming and Tian Qinjian |
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| Institution: | Seismological Bureau of Qinghai Province, Xining 810001, China;Seismological Bureau of Qinghai Province, Xining 810001, China;School of Earth & Space Science, University of Science & Technology of China, Hefei 230026, China |
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| Abstract: | An M 8.1 earthquake that occurred west of the Kunlun Mountains Pass has caused more than 20 collapse bodies or zones, which are mainly distributed near the surface seismic rupture zone, west of Hoh Sai Lake. The collapses are of four types, bedrock, soil mass and ice mass collapses and avalanches. The spatial distribution and the characteristics of development of the collapses are analyzed in the paper. Comparised with those caused by other earthquakes, the collapses are smaller in scale. In addition to the lithological characteristics of the crustal media, topographic, geomorphic and climatic factors, weaker seismic ground motion is an important cause for formation of the smaller-scale collapses. The long surface rupture zone and weaker ground motion are important features of the seismic rupture, which may be related to the structure of the preexisting fault. |
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| Keywords: | Kunlun Mountains Pass The M 8 1 earthquake Seismic collapse Geographic environment |
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