四川省汶川大地震成因及次生灾害
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摘要
2008年5月12日14时28分,四川阿坝藏族羌族自治州境内的汶川县(31°N,103.4°E)发生了里氏8.0级浅源地震。震区范围长240km、宽30km,等震线呈长椭圆形,长轴为北东向,震中烈度约为10度,深度为12～19km。震区涉及四川绵阳市北川、德阳、汶川、成都、都江堰、广元、重庆以及甘肃、云南、陕西、河南等地区。除了吉林、黑龙江和新疆地区外,全国都有震感。在北川、汶川等多地区出现次生灾害。地震的发震构造是龙门山构造带中央断裂带。
At 2:28 p.m.on May 12,2008,the Great Wenchuan Earthquake happened,at Wenchuan County,Aba Tibetan and Qiang Autonomous Prefecture,Sichuan Province(31°N,103.4°E).This Earthquake of magnitude 8.0 produced an earthquake zone 240km long and 30km wide.The isoseismal lines are of long ellipse,and its long axis trends the NE-direction.The epicenter intensity is about 10 degrees,and the hypocenter is of 12-19km depth,which should belong to a kind of shallow earthquakes.The Earthquake zones are involved in Beichuan,Deyang,Wenchuan,Chengdu,Dujiangyan,Guangyuan areas in Sichuan Province,and Chongqing,Gansu,Yunnan,Shaanxi,Henan and other regions.Except for Jilin,Heilongjiang and Xinjiang,the people in the China had got the tremble felt.Most of the buildings had been damaged in Beichuan and Wenchuan,and lots of secondary disasters had occurred in various regions.The seismogenic structure is the central Longmen Shan fault zone,also called the Beichuan-Yingxiu fault active zone.
At 2:28 p.m.on May 12,2008,the Great Wenchuan Earthquake happened,at Wenchuan County,Aba Tibetan and Qiang Autonomous Prefecture,Sichuan Province(31°N,103.4°E).This Earthquake of magnitude 8.0 produced an earthquake zone 240km long and 30km wide.The isoseismal lines are of long ellipse,and its long axis trends the NE-direction.The epicenter intensity is about 10 degrees,and the hypocenter is of 12-19km depth,which should belong to a kind of shallow earthquakes.The Earthquake zones are involved in Beichuan,Deyang,Wenchuan,Chengdu,Dujiangyan,Guangyuan areas in Sichuan Province,and Chongqing,Gansu,Yunnan,Shaanxi,Henan and other regions.Except for Jilin,Heilongjiang and Xinjiang,the people in the China had got the tremble felt.Most of the buildings had been damaged in Beichuan and Wenchuan,and lots of secondary disasters had occurred in various regions.The seismogenic structure is the central Longmen Shan fault zone,also called the Beichuan-Yingxiu fault active zone.
引文
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[3]陆仲家,黄培华.地震地质学简明教程[M].北京:地震出版社,1991.
[4]国土资源部地质环境司,国土资源部宣传教育中心.中国地质灾害与防治[M].北京:地质出版社,2003.141～671.
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[8]何冬晓,谢世友,孙在斌,邓晓军.2005年8月5日云南省会泽—四川省会东5.3级地震四川震区地震宏观烈度考察.[J]四川地质学报,2007(27):31～36.
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[10]胡先明,钟国平.四川省天然地震的次生水灾害[J].四川地震,2007(3):28～32.
[11]韩渭宾.地震灾害基本特点及防震减灾对策的几点思考[J]四川地震,2004(3):1～5.
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[14]蒋承菘.中国地质灾害的现状与防治工作[J].中国地质,2000(4):3～51.
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