Volume 35 Issue 4
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Article Navigation >  Chinese Journal of Space Science  > 2015  >  35(4): 415-423
ZHU Yiting, ZONG Weiguo, PEI Shixin. Relationship between X-class Flares and Geomagnetic Effects[J]. Chinese Journal of Space Science, 2015, 35(4): 415-423. doi: 10.11728/cjss2015.04.415
Citation: ZHU Yiting, ZONG Weiguo, PEI Shixin. Relationship between X-class Flares and Geomagnetic Effects[J]. Chinese Journal of Space Science, 2015, 35(4): 415-423. doi: 10.11728/cjss2015.04.415
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Relationship between X-class Flares and Geomagnetic Effects

doi: 10.11728/cjss2015.04.415
  • 1.

    School of Mathematics and Statistics, Nanjing University of Information Science and Technology, Nanjing 210044

  • 2.

    National Satellite Meteorological Center, China Meteorological Administration, Beijing 100081

  • 3.

    School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology, Nanjing 210044

  • Received Date: 2014-07-07
  • Rev Recd Date: 2014-12-31
  • Publish Date: 2015-07-15
    Abstract
  • A statistical study has been conducted on all the geomagnetic storms caused by Coron Mass Ejection (CMEs) which are associated with flares from January 2010 to December 2012. The following results are obtained. The initial locations of CMEs mentioned above are distributed from 45°E to 45°W in solar longitude, accounting 78.95% of the total. Besides, the CMEs located in the west hemisphere are more likely to cause geomagnetic effects. X-class flares are more likely to be geo-effective, while flares in other classes have much lower probability. Geomagnetic storms will be observed in two or three days after 60% of X-class flares eruption. Therefore, more attention should been paid on X-class flares. By analyzing all the X-class flares erupted during this period, it is found that for the X-class flares located from 45°E to 45°W in solar longitude, if there is no disturbance on the solar surface (EUV wave) during eruption, the probability of the occurrence of geomagnetic storms after the flares will be very small. Therefore, a new method for geomagnetic storm forecasting by analyzing the Sun surface observations has been proposed.

     

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