| 山西地区重力场变化与洪洞ML5.0地震 |
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| 引用本文： | 冯建林,李清林,秦建增.山西地区重力场变化与洪洞ML5.0地震[J].山西地震,2005(3):20-23,41. |
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| 作者姓名： | 冯建林 李清林 秦建增 |
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| 作者单位： | 中国地震局地球物理勘探中心,河南,郑州,450002 |
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| 基金项目： | 本文得到中国地震局地球物理勘探中心第四研究室全体同仁的指导和帮助,在此一并致谢! |
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| 摘 要： | 选取山西测网内2002年至2004年的重力复测资料,研究了2003年11月25日山西洪洞ML5.0地震前后该区重力场的变化特征,认为重力场变化与洪洞ML5.0地震有较好的对应关系,山西地震带上断陷盆地内的活动断裂蠕动和地壳内部质量迁移等因素的共同作用导致该区重力场发生变化,进而引起了该次地震的发生.
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| 关 键 词： | 重力场 断层蠕动 质量迁移 洪洞ML5.0地震 |
| 文章编号： | 1000-6265（2005）03-0020-04 |
| 收稿时间： | 2005-02-14 |
| 修稿时间： | 2005-02-142005-04-10 |
Variation of Gravity Field in Shanxi Region before and after Hongtong, Shanxi, Earthquake of ML 5.0 |
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| FENG Jian-lin,LI Qing-lin,QIN Jian-zeng.Variation of Gravity Field in Shanxi Region before and after Hongtong, Shanxi, Earthquake of ML 5.0[J].Earthquake Research in Shanxi,2005(3):20-23,41. |
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| Authors: | FENG Jian-lin LI Qing-lin QIN Jian-zeng |
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| Institution: | Geophysical Prospecting Center of CSB, Henan,Zhengzhou 450002,China |
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| Abstract: | Variation feature of gravity field in Shanxi region before and after Hongtong, Shanxi, earthquake of Me5.0 is studied, using re-measuring gravity data, from 2002 to 2004, within Shanxi observation network. It is found that variation of gravity field well correlated with Hongtong, Shanxi, earthquake of ML 5. 0. It is pointed out that variation of gravity field in this region is resulted in creeping motion of active faults within downfaulted basin of Shanxi Seismic Belt and mass transition inside the crust etc. , which lead to this earthquake. |
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| Keywords: | Gravity field Creeping motion of fault Mass transition Hongtong earthquake of ML5 0 |
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