Volume 35 Issue 1
Jan.  2015
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Huang Wengeng, Shen Hua, Liu Siqing, Zhong Qiuzhen, Chen Yanhong. Fluctuations of high-energy electron fluxes in Earth's radiation belt and its applications for geomagnetic storm alert[J]. Chinese Journal of Space Science, 2015, 35(1): 18-25. doi: 10.11728/cjss2015.01.018
Citation: Huang Wengeng, Shen Hua, Liu Siqing, Zhong Qiuzhen, Chen Yanhong. Fluctuations of high-energy electron fluxes in Earth's radiation belt and its applications for geomagnetic storm alert[J]. Chinese Journal of Space Science, 2015, 35(1): 18-25. doi: 10.11728/cjss2015.01.018
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Fluctuations of high-energy electron fluxes in Earth's radiation belt and its applications for geomagnetic storm alert

doi: 10.11728/cjss2015.01.018 cstr: 32142.14.cjss2015.01.018

  • Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190

  • Received Date: 2014-02-26
  • Rev Recd Date: 2014-05-16
  • Publish Date: 2015-01-15
    Abstract
  • The outer radiation belt consists mainly of high energy electrons trapped by the Earth's magnetic field. The disturbance of the geomagnetic field caused by the Coronal Mass Ejection (CME) or the Co-rotating Interaction Region (CIR) can result in electron radiation belt variations. According to the variation feature of high energy electron flux in the outer radiation belt during magnetic storms, a novel index referred to as high electron flux fluctuation index was evaluated by using the 5-min resolution sampled electron flux data provided by GOES, and its correlation with geomagnetic Kp index was analyzed. It is found that high electron flux fluctuation index has a good correlation with geomagnetic Kp index, and the new index can be used as an indicator of geomagnetic storm occurrence. In comparison with 3-hour Kp index, which is wildly used in space environment operation prediction system, the suggested index in this paper can alert geomagnetic storm occurrence earlier.

     

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