Study of the Geoeffectiveness of Halo CMEs in different phases of solar activity cycle 23
نویسندگان
چکیده
3 Department of Physics, Govt. New Science College, Rewa, (M.P.), 486001, INDIA; __________________________________________________________________________________________ Abstract: Based on SOHO/LASCO catalogue and solar geophysical data, we studied the geoeffectiveness, solar source and flare association of a set of 397 halo CMEs during the period of 1996 to 2008. We find that Disk halos are followed by strong storms, limb halos are followed by moderately storms and backside halos are about near to moderate storms. The Frontside halos (Disk +F-limb) are most geoeffective (~71%). Intense storms are occurred in maximum phase of solar cycle and the few are occurred in declining phase. Most intense storms occur, when there are successive CMEs and occurred near the disk center towards western hemisphere. The Limb halos are faster than the Disk halos and Backside halos. _________________________________________________________________________________________
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