| Ionospheric Ne disturbances before 2007 Pu’er,Yunnan, China,earthquake |
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| 引用本文： | 欧阳新艳,张学民,申旭辉,刘静,钱家栋,蔡晋安,赵庶凡.Ionospheric Ne disturbances before 2007 Pu’er,Yunnan, China,earthquake[J].地震学报(英文版),2008,21(4):425-437. |
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| 作者姓名： | 欧阳新艳 张学民 申旭辉 刘静 钱家栋 蔡晋安 赵庶凡 |
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| 作者单位： | Institute of Earthquake Science, China Earthquake Administration |
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| 基金项目： | Fundermental Scientific Research of Institute of Earthquake Science, China Earthquake Administration (0207690221);National Key Technology Research and Development Program |
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| 摘 要： | Selecting three half orbits near the epicenter of Pu’er earthquake, we analyzed the Ne data recorded in their revis-ited orbits during a year before this earthquake, and extracted Ne precursors. The results show that: ① There are significant seasonal variations of ionospheric Ne in night time, which exhibit different shapes respectively in four seasons; ② There are three main shapes of Ne: single-peak, saddle-shaped and even-shaped, all of which may oc-cur in four seasons, but each season with its typical shape relatively; ③ Spatial images of Ne showed high values near the epicenter in 30 days before the earthquake, and there is a good correlation between anomaly and distribu-tion of earthquake in space and time, which reflects that these spatial anomalies were indeed concerned with the earthquake; ④There shows a certain similarity of the Ne curves among revisited orbits, which can provide back-ground information for distinguishing and identification of seismic anomaly.
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| 关 键 词： | Pu’er earthquake DEMETER satellite electron density (Ne) seasonal variations earthquake-related anomaly |
| 收稿时间： | 14 November 2008 |
Ionospheric Ne disturbances before 2007 Pu’er, Yunnan, China, earthquake |
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| Xin-yan Ouyang, Xue-min Zhang, Xu-hui Shen, Jing Liu, Jia-dong Qian, Jin’an Cai and Shu-fan Zhao.Ionospheric Ne disturbances before 2007 Pu’er, Yunnan, China, earthquake[J].Acta Seismologica Sinica(English Edition),2008,21(4):425-437. |
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| Authors: | Xin-yan Ouyang Xue-min Zhang Xu-hui Shen Jing Liu Jia-dong Qian Jin’an Cai and Shu-fan Zhao |
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| Institution: | (1) Institute of Earthquake Science, China Earthquake Administration, Beijing, 100036, China |
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| Abstract: | Selecting three half orbits near the epicenter of Pu’er earthquake, we analyzed the N
e data recorded in their revisited orbits during a year before this earthquake, and extracted N
e precursors. The results show that: ① There are significant seasonal variations of ionospheric N
e in night time, which exhibit different shapes respectively in four seasons; ② There are three main shapes of N
e: single-peak, saddle-shaped and even-shaped, all of which may occur in four seasons, but each season with its typical shape
relatively; ③ Spatial images of N
e showed high values near the epicenter in 30 days before the earthquake, and there is a good correlation between anomaly and
distribution of earthquake in space and time, which reflects that these spatial anomalies were indeed concerned with the earthquake;
④ There shows a certain similarity of the N
e curves among revisited orbits, which can provide background information for distinguishing and identification of seismic
anomaly.
Foundation item: Fundermental Scientific Research of Institute of Earthquake Science, China Earthquake Administration (0207690221) and National
Key Technology Research and Development Program. |
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| Keywords: | Pu’ er earthquake DEMETER satellite electron density (N e) seasonal variations earthquake-related anomaly |
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