| 汶川MS8.0级大震前天基与陆基电场资料联合应用研究 |
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| 引用本文： | 安张辉,杜学彬,范莹莹,刘君,谭大诚,陈军营,解滔.汶川MS8.0级大震前天基与陆基电场资料联合应用研究[J].地球物理学报,2011,54(11):2876-2884. |
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| 作者姓名： | 安张辉 杜学彬 范莹莹 刘君 谭大诚 陈军营 解滔 |
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| 作者单位： | 1. 中国地震局地震预测研究所兰州科技创新基地,兰州 730000;
2. 中国地震局兰州地震研究所,兰州 730000 |
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| 基金项目： | 中国地震局地震预测研究所基本科研业务专项(A88-3)和国家科技支撑计划(2008BAC35B01-8)联合资助. |
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| 摘 要： | 利用边际谱方法对2008年5月12日四川汶川地震前天基和陆基电场变化情况进行了联合分析研究,结果表明:(1)空间电场方面,由重复轨道和连续轨道电场边际谱演化看出,电离层电场从2008年4月27日左右开始,其边际谱出现了明显的增强现象(增大1~2个量级),这种现象一直持续到汶川地震发生.(2)陆基电场方面,中法合作的松山...
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| 关 键 词： | 汶川地震 天基和陆基电场 联合应用研究 边际谱 DEMETER卫星 |
| 收稿时间： | 2011-04-01 |
A study of the electric field before the Wenchuan 8.0 earthquake of 2008 using both space-based and ground-based observational data |
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| AN Zhang-Hui,DU Xue-Bin,FAN Ying-Ying,LIU Jun,TAN Da-Cheng,CHEN Jun-Ying,XIE Tao.A study of the electric field before the Wenchuan 8.0 earthquake of 2008 using both space-based and ground-based observational data[J].Chinese Journal of Geophysics,2011,54(11):2876-2884. |
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| Authors: | AN Zhang-Hui DU Xue-Bin FAN Ying-Ying LIU Jun TAN Da-Cheng CHEN Jun-Ying XIE Tao |
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| Institution: | 1. Lanzhou Base of Institute of Earthquake Prediction, China Earthquake Administration, Lanzhou 730000, China;
2. Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China |
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| Abstract: | We studied the changes of the electric field before the Wenchuan MS8.0 earthquake of 2008 using both space-based and ground-based observational data and the method of marginal spectrum. The evolution of marginal spectrum of the electric field from the repeat orbits and continuous orbits reveals that the marginal spectrum of the electric field in the ionosphere had a remarkable increase (about 1~2 orders of magnitude) from the 27th April, 2008 to the time when the Wenchuan earthquake happened. For the evolution of marginal spectrum of the electric field from the ground-based data, the marginal spectrum of Songshan station of Sino-French cooperation began to enhance (increased by 2 orders of magnitude) from 25th~29th,April, 2008. Such a phenomenon appeared at Chengdu, Longnan and Tianshui stations (increased by 2 orders of magnitude) from 10th~14th, April, 2008. Despite that the marginal spectrum enhancement was identical at Chengdu, Longnan and Tianshui stations, but it ended at different times. This process ended earlier at the Songshan and Tianshui stations than the Chengdu and Longnan stations. It seems that the enhancement of marginal spectra of both the ground and space electric fields happened at a roughly same time. |
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| Keywords: | Wenchuan earthquake The electric field of space-based and ground-based Study of integrate application Marginal spectrum DEMETER satellite |
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