In this article we have taken the data of coronal mass ejections (CMEs), solar flares and geomagnetic storms (GMS) for the period 2000-2010. For this time duration we have found 31 geomagnetic storms events, out of which 29 (93.54%) geomagnetic storms are associated with CMEs. Out of 29 geomagnetic storms 20 (68.96%) are associated with halo CMES and 9 (31.03%) are associated with partial halo CMEs. Again we observe that all the geomagnetic storms are associated with solar flares of different categories but most of the geomagnetic storms (64.51%) are related to M class X-ray solar flares. We have found the positive weak correlation between magnitude of geomagnetic storms and coronal mass ejections with correlation coefficient 0.13 between these two events.
Keywords: – Coronal mass ejections, Geomagnetic storms, Solar flares.
Preetam Singh Gour, Shiva Soni