Published Paper Details:

Geomagnetic storms are the most dramatic manifestation of solar-terrestrial coupling they involve the injection of large amounts of energy from the solar wind into the earth's magnetosphere, Ionosphere and thermosphere.There are number of solar sources, two types of solar wind streams and different interplanetary parameters that are responsible for geomagnetic storms have been investigated by many researcher.Recurrent storms occur most frequently in the declining phase of the solar cycle. geomagnetic storms occur most frequently near solar maximum.The low-energy ions that replace them contribute little current, and so the strength of the ring current decreases with time.and general study and different characteristics of above selected 158 large geomagnetic storms are performed in this section. Out of the selected large geomagnetic storm events, 82 are sudden commencement type and rest 76 is gradual commencement type. Geomagnetic storms are the most dramatic manifestation of solar-terrestrial coupling. They involve the injection of large amounts of energy from the solar wind into the earth's magnetosphere, ionosphere and thermosphere.