| 汶川M_S8.0地震前后的重力场动态变化 |
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| 引用本文： | 祝意青,梁伟锋,徐云马,郭树松,刘芳.汶川M_S8.0地震前后的重力场动态变化[J].地震学报,2010,32(6):633-640. |
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| 作者姓名： | 祝意青 梁伟锋 徐云马 郭树松 刘芳 |
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| 作者单位： | 1）中国西安710054中国地震局第二监测中心
2）中国武汉430077中国科学院测量与地球物理研究所动力大地测量学重点实验室 |
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| 基金项目： | 中国地震局M7专项项目，国家自然科学基金，地震行业科研重点专项项目 |
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| 摘 要： | 利用国家重大科学工程"中国地壳运动观测网络"1998—2008年绝对重力和相对重力的观测资料,获得了南北地震带地区的重力场及其动态变化,从动态的观点研究了2008年5月12日汶川8.0级地震前后区域重力场演化特征及其与地震活动的关系.重力场变化既具有时-空分布的不均匀性,同时又具有与活动断裂构造密切相关和与地震孕育发展有着内在联系.重力场动态变化图象较清晰地反映了汶川大地震孕育、发生过程中出现的重力前兆信息.
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| 关 键 词： | 汶川地震 重力变化 动态过程 地震前兆 地震预测 |
Dynamic variation of gravity field before and after Wenchuan MS8.0 earthquake |
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| Zhu Yiqing,Liang Weifeng,Xu Yunma,Guo Shusong,Liu Fang.Dynamic variation of gravity field before and after Wenchuan MS8.0 earthquake[J].Acta Seismologica Sinica,2010,32(6):633-640. |
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| Authors: | Zhu Yiqing Liang Weifeng Xu Yunma Guo Shusong Liu Fang |
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| Institution: | 1）SecondMonitoring Center, China Earthquake Administration, Xirsquo;an 710054, China2）Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China |
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| Abstract: | Based on the data of absolute and relative gravity observations of the national major scientific project China Crustal Movement Observation Network from 1998 to 2008，gravity field in the North-South seismic belt region and its dynamic variations are obtained. The evolution characteristics of regional gravity field and its relationship with the seismic activity before and after the 12 May 2008 WenchuanMS8.0 earthquake are studied in the sight of dynamics. The dynamic variation image of gravity field reflect the portentous information of the development and occurrence of Wenchuan MS8.0 earthquake more clearly. The variations of gravity field show spatial and temporal inhomogeneity, at the same time, however, they reveal certain relation associated with the development and Occurrenceoftheearthquake, and associated also with regional tectonic activity. |
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