The statistical relationship between solar wind parameters and geomagnetic activities during the maximum phase of the solar cycle 23(1999~2003)

Details The statistical relationship between solar wind parameters and geomagnetic activities during the maximum phase of the solar cycle 23(1999~2003) The statistical relationship between solar wind parameters and geomagnetic activities during the maximum phase of the solar cycle 23(1999~2003)

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm51a1753m&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM51A-1753

Physics

[2784] Magnetospheric Physics / Solar Wind/Magnetosphere Interactions, [2788] Magnetospheric Physics / Magnetic Storms And Substorms

Scientific paper

Title: The statistical relationship between solar wind parameters and geomagnetic activities during the maximum phase of the solar cycle 23(1999~2003) It is generally believed that the occurrence of magnetic storm depends upon the solar conditions, especially southward IMF component. To understand the solar wind-magnetosphere coupling, the influence of the solar wind parameters on the development of magnetic storms is examined during the maximum phase of the solar cycle 23(1999~2003). For this purpose the time-integrated solar wind parameters is compared with the time-integrated Dst during the main phase of each magnetic storm. Also examined is how the direction change of IMF By and Bz components(in GSM coordinate) during the main phase is related with the development of storm. Some results are worth noting: First, it is found that the correlation is high between the integrated IMF Bz and integrated Dst index during the main phase of magnetic storms. The high correlation between integrated AL index and integrated Dst index is also noted. Second, the direction of Bz plays a more important role in developing magnetic storms than that of By. Regardless of the By direction, over 60% of storms occurred when Bz component showed negative value. Third, the fluctuations of IMF By and Bz components seem to be one of the main sources leading to the development of magnetic storm.

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