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| 引用本文： | 郝晓光,胡小刚,许厚泽,钟敏,方剑,郝兴华,刘明,刘根友,薛怀平.?????????????????[J].大地测量与地球动力学,2008,28(3):129-131. |
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| 作者姓名： | 郝晓光 胡小刚 许厚泽 钟敏 方剑 郝兴华 刘明 刘根友 薛怀平 |
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| 作者单位： | 中国科学院测量与地球物理研究所,武汉,430077 |
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| 摘 要： | ??1997??5?2???LacosteET-21?????????й?????????????South of Kermadec Islands 7.1??????????????????????????2008??5???????人???????????????????LacosteET-20??????????????з???????????????????????????????????????????????????????????????????0.8??10 -8 ms-2??????????????????????μ????????????????????????ET-21??ET-20?????????ü???????????????????????????????Щ??????????????????????????????????????????????????(1~2)??10 -8 ms -2????????????4??8 s??
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| 关 键 词： | ??????? Lacoste??ET?????? ?????????? ??? ???? |
| 文章编号： | 1671-5942(2008)03-0129-03 |
| 修稿时间： | 2008年5月19日 |
GRAVITY DISTURBANCE BEFORE WENCHUAN Ms8.0 EARTHQUAKE |
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| Hao Xiaoguang,Hu Xiaogang,Xu Houze,Zhong Min,Fang Jian,Hao Xinghua,Liu Min,Liu Genyou,Xue Huaiping.GRAVITY DISTURBANCE BEFORE WENCHUAN Ms8.0 EARTHQUAKE[J].Journal of Geodesy and Geodynamics,2008,28(3):129-131. |
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| Authors: | Hao Xiaoguang Hu Xiaogang Xu Houze Zhong Min Fang Jian Hao Xinghua Liu Min Liu Genyou Xue Huaiping |
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| Institution: | Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077 |
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| Abstract: | After having deserved the significant gravity disturbance before the Kermadec Islands earthquake (Mw 7.1) on May 27,1997 at Zhongshan station in Antarctica with LacosteET 21 gravimeter, and observed the similar disturbance before the Wenchuan earthquake ( Ms 8.0) on May 12,2008 at the Wuhan National Field Scientific Observation Station for Geodesy with LacosteET 20 gravimeter. The analysis of the gravity data of the Wenchuan earthquake shows that the gravity disturbance had been gradually increasing since two days before the earthquake with the maximum amplitude of about 0.8×10 -8 ms -2. The observations of gravity disturbance before earthquake are reliable, as the anomaly was observed at different sites with different Lacoste ET gravimeters. It is concluded that the significant gravity disturbance appear usually about two days before some strong earthquakes with the amplitude of (1~2)×10-8 ms-2 and the period of 4-8 s. |
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| Keywords: | Wenchuan earthquake Lacoste-ET gravimeter gravity disturbance before earthquake amplitude period |
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