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Removing Solar Radiation Based on the Empirical Mode Decomposition Method for Seismo-Ionospheric Anomaly Before the M9.0 Tohoku Earthquake

HU Yanli XU Tong WU Jian

HU Yanli, XU Tong, WU Jian. Removing Solar Radiation Based on the Empirical Mode Decomposition Method for Seismo-Ionospheric Anomaly Before the M9.0 Tohoku Earthquake[J]. 空间科学学报, 2013, 33(5): 518-524. doi: 10.11728/cjss2013.05.518
引用本文: HU Yanli, XU Tong, WU Jian. Removing Solar Radiation Based on the Empirical Mode Decomposition Method for Seismo-Ionospheric Anomaly Before the M9.0 Tohoku Earthquake[J]. 空间科学学报, 2013, 33(5): 518-524. doi: 10.11728/cjss2013.05.518
HU Yanli, XU Tong, WU Jian. Removing Solar Radiation Based on the Empirical Mode Decomposition Method for Seismo-Ionospheric Anomaly Before the M9.0 Tohoku Earthquake[J]. Journal of Space Science, 2013, 33(5): 518-524. doi: 10.11728/cjss2013.05.518
Citation: HU Yanli, XU Tong, WU Jian. Removing Solar Radiation Based on the Empirical Mode Decomposition Method for Seismo-Ionospheric Anomaly Before the M9.0 Tohoku Earthquake[J]. Journal of Space Science, 2013, 33(5): 518-524. doi: 10.11728/cjss2013.05.518

Removing Solar Radiation Based on the Empirical Mode Decomposition Method for Seismo-Ionospheric Anomaly Before the M9.0 Tohoku Earthquake

doi: 10.11728/cjss2013.05.518
基金项目: Supported by the Seismic Public Welfare Scientific Research Special Appropriation Project of China (201008007) and the National Natural Science Foundation of China (41004066)
详细信息
    作者简介:

    HU Yanli, E-mail: huyanli22s@163.com

  • 中图分类号: P352

Removing Solar Radiation Based on the Empirical Mode Decomposition Method for Seismo-Ionospheric Anomaly Before the M9.0 Tohoku Earthquake

More Information
    Author Bio:

    HU Yanli, E-mail: huyanli22s@163.com

  • 摘要: The ionospheric effect from solar activity can be seen as the background in the process of detecting the ionospheric precursor prior to strong earthquakes. The ionospheric variation induced by the forthcoming earthquake can be covered by the strong solar background during the period of high solar activity. The issue of how to remove the ionospheric effect from solar radiation is of outstanding significance. In this paper, a method of Empirical Mode Decomposition (EMD) is used to eliminate the solar background. As a case study, the global ionospheric map TEC before the M9.0 Tohoku earthquake on 11 March 2011 is analyzed. After the effect of solar radiation is removed using the EMD method, the precursor of the imminent earthquake is more obvious. The ionospheric anomaly had a local character and only appeared close to the earthquake epicenter while the useful signals were covered by the solar radiation background with traditional method, which implies that the EMD method is effective in eliminating solar radiation background.

     

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出版历程
  • 收稿日期:  2012-10-19
  • 修回日期:  2013-05-22
  • 刊出日期:  2013-09-15

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