日本九州岛地震震前电离层TEC异常

doi:10.11947/j.AGCS.2016.F035

测绘学报 ›› 2016, Vol. 45 ›› Issue (S2): 139-146.doi: 10.11947/j.AGCS.2016.F035

日本九州岛地震震前电离层TEC异常

杨力^1,2, 赵海山^1,2, 董明³, 徐世依^1,2, 南天浩⁴

1. 信息工程大学, 河南郑州 450001;
2. 北斗导航应用技术河南省协同创新中心, 河南郑州 450001;
3. 卫星导航工程中心, 北京 100000;
4. 武警黄金第四支队, 辽宁辽阳 111000

收稿日期:2016-11-25 修回日期:2016-12-20 出版日期:2017-05-20 发布日期:2017-05-20
通讯作者: 赵海山 E-mail:313449511@qq.com
作者简介:杨力(1965-),男,教授,主要从事大地测量与导航领域科学研究。E-mail:chxygps@sina.com
基金资助:
地理信息工程国家重点实验室开放基金课题经费（SKLJIE2014-Z-2-1）

Ionospheric Anomaly before Kyushu|Japan Earthquake

YANG Li^1,2, ZHAO Haishan^1,2, DONG Ming³, Xu Shiy^1,2, NAN Tianhao⁴

1. Information Engineering University, Zhengzhou 450001, China;
2. BeiDou Navigation Technology Collaborative Innovation Center of Henan, Zhengzhou 450001, China;
3. Satellite Navigation Engineering Center, Beijing 100000, China;
4. Fourth Detachment of Armed Forces of Gold, Liaoyang 111000, China

Received:2016-11-25 Revised:2016-12-20 Online:2017-05-20 Published:2017-05-20
Supported by:
Geo-information Ergineering State Key Laboratory Open Fund(No.SKLJIE2014-Z-2-1)

摘要/Abstract

摘要：

采用IGS发布的GIM数据，提出了一种结合滑动时窗法和临近格网点电离层TEC相关性分析法的联合分析方法，研究了震前电离层异常变化与地震的关系。通过分析震区附近5个格网点TEC的异常变化情况，发现震前电离层TEC发生明显异常变化，且格网点之间的TEC序列相关性受地震显著影响；通过分析二维电离层图的TEC异常空间分布，发现震前三天震中附近分别出现6 h、12 h和6 h的异常。最后利用电离层层析的方法，对电离层异常时刻进行了电子密度的反演，进一步分析了电子密度在电离层异常时刻的分布情况。

关键词: 电离层异常, 滑动时窗法, 相关性分析, 地磁指数, 太阳活动指数, 电离层层析

Abstract:

GIM data released by IGS is used in the article and a new method of combining the Sliding Time Window Method and the Ionospheric TEC correlation analysis method of adjacent grid points is proposed to study the relationship between pre-earthquake ionospheric anomalies and earthquake. By analyzing the abnormal change of TEC in the 5 grid points around the seismic region, the abnormal change of ionospheric TEC is found before the earthquake and the correlation between the TEC sequences of lattice points is significantly affected by earthquake. Based on the analysis of the spatial distribution of TEC anomaly, anomalies of 6 h, 12 h and 6 h were found near the epicenter three days before the earthquake. Finally, ionospheric tomographic technology is used to do tomographic inversion on electron density. And the distribution of the electron density in the ionospheric anomaly is further analyzed.

Key words: ionospheric anomaly, sliding window method, correlation analysis, geomagnetic indices, solar activity index, Ionospheric tomography

中图分类号:

P228

杨力, 赵海山, 董明, 徐世依, 南天浩. 日本九州岛地震震前电离层TEC异常[J]. 测绘学报, 2016, 45(S2): 139-146.

YANG Li, ZHAO Haishan, DONG Ming, Xu Shiy, NAN Tianhao. Ionospheric Anomaly before Kyushu|Japan Earthquake[J]. Acta Geodaetica et Cartographica Sinica, 2016, 45(S2): 139-146.

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日本九州岛地震震前电离层TEC异常

Ionospheric Anomaly before Kyushu|Japan Earthquake

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