| 地震前后电离层截止频率处电场频谱强度变化分析——以2006年汤加Mw8.o地震为例 |
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| 引用本文： | 张学民,泽仁志玛,申旭辉,蔡军涛,赵庶凡,熊攀,陈化然,欧阳新艳.地震前后电离层截止频率处电场频谱强度变化分析——以2006年汤加Mw8.o地震为例[J].地震学报,2011,33(4):451-460. |
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| 作者姓名： | 张学民 泽仁志玛 申旭辉 蔡军涛 赵庶凡 熊攀 陈化然 欧阳新艳 |
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| 作者单位： | 中国北京100036中国地震局地震预测研究所
2) Istituto Nazionale di Fisica Nucleare, Perugia 06125， Italy
3) 中国南京210014江苏省地震局
4) 中国北京100081中国地震局地球物理研究所 |
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| 基金项目： | 国际科技合作项目(2009DFA21480); 国家科技支撑项目(2008BAC35B01,2008BAC35B05)联合资助 |
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| 摘 要： | 以汤加Mw8.0地震为例,着重分析了DEMETER卫星记录中截止频率附近电磁场频谱在震前的异常演化特征.根据地震前后该区域3个月的数据对比,发现电场频谱增强与地震孕育的关系很不明显.而长时间、大范围的电场频谱减弱现象可能更值得关注,白天和夜间的电场频谱显示同一特征.2006年夏秋季节38次6级以上强震短期异常的统计平均...
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| 关 键 词： | DEMETER 电磁场 电离层 截止频率 2006年汤加Mw8.0地震 |
Analysis on variation of electric field spectrum at cut-off frequency before strong earthquakes: Taking 2006 Tonga M_W8.0 earthquake as an example |
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| Zhang Xuemin,Zeren Zhima,Shen Xuhui,Cai Juntao,Zhao Shufan,Xiong Pan,Chen Huaran,Ouyang Xinyan.Analysis on variation of electric field spectrum at cut-off frequency before strong earthquakes: Taking 2006 Tonga M_W8.0 earthquake as an example[J].Acta Seismologica Sinica,2011,33(4):451-460. |
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| Authors: | Zhang Xuemin Zeren Zhima Shen Xuhui Cai Juntao Zhao Shufan Xiong Pan Chen Huaran Ouyang Xinyan |
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| Institution: | 1) Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China2) Istituto Nazionale di Fisica Nucleare, Perugia 06125，Italy3) Earthquake Administration of Jiangsu Province, Nanjing 210014, China4) Institute of Geophysics, C |
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| Abstract: | Taking a Tonga MW8.0 earthquake as an example,we focus on the analysis of evolutional features of electromagnetic field spectrum in a band around cut-off frequency recorded by DEMETER satellite.The result indicates that the increase in electric spectrum amplitude were not closely related to earthquake preparation process based on comparison of 3-month data above the study region.However,we should pay more attention to the long period and large scale decreasing variation of the electric field in this frequen... |
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| Keywords: | DEMETER electric field ionosphere cut-off frequency 2006 Tonga MW8 0 earthquake |
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