| Analyses on gravity variation before and after the Lijiang earthquake based on a finite rectangular dislocation model |
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| 作者姓名： | 燕乃玲 李辉 申重阳 |
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| 作者单位： | [1]InstituteofGeographyandLimnology,ChineseAcademyofSciences,nanjing210008,China [2]InstituteofSeismology,ChinaSeismologicalBureau,Wuhan430070,China |
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| 基金项目： | Joint Seismological Science Foundation of China (No.101005). |
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| 摘 要： | The methods were discussed to calculate the gravity variation due to crustal deformation based on a model of dis-location on a finite rectangular plane.Taking the Lijiang Ms=7.0 earthquake as an example the calculating princi-ple of fault parameters were determined,and the results were given.Of particular interests were the characteristics of the gravity variations in different dislocation types.With comparison between the calculated results and the practical measurements,it was found that the model could to some extent account for the observations.But it failed to give explanations to the more far spatial gravity variation.
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| 关 键 词： | 重力异常 丽江地震 云南 地震前兆 地壳变形 位移模型 |
| 收稿时间： | 29 March 2002 |
| 修稿时间： | 9 October 2002 |
Analyses on gravity variation before and after the Lijiang earthquake based on a finite rectangular dislocation model |
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| Yan Nai-ling , Li Hui and Shen Chong-yang.Analyses on gravity variation before and after the Lijiang earthquake based on a finite rectangular dislocation model[J].Acta Seismologica Sinica(English Edition),2003,16(2):185-194. |
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| Authors: | Yan Nai-ling Li Hui and Shen Chong-yang |
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| Institution: | 1. Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;Graduate School, Chinese Academy of Sciences, Beijing 100039, China
2. Institute of Seismology, China Seismological Bureau, Wuhan 430070, China |
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| Abstract: | The methods were discussed to calculate the gravity variation due to crustal deformation based on a model of dis-location on a finite rectangular plane. Taking the Lijiang MS=7.0 earthquake as an example the calculating princi-ple of fault parameters were determined, and the results were given. Of particular interests were the characteristics of the gravity variations in different dislocation types. With comparison between the calculated results and the practical measurements, it was found that the model could to some extent account for the observations. But it failed to give explanations to the more far spatial gravity variation. |
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| Keywords: | a finite rectangular dislocation model Lijiang earthquake co-seismic gravity field variations |
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