Analysis of Sequential Geomagnetic storms as Single and Separate Entity

The Geomagnetic Storms which occur one after the other within the time gap of 24 hours or which occur before the previous one has ended are investigated. Only those Geomagnetic storms for which Dst index falls below -100nT are chosen and the period selected is from 1996 to 2006. The investigation is done in two ways: 1) by considering each storm separately and 2) by considering the storms occurring in succession as single storm and assessing their cumulated effect. For doing so, the solar and interplanetary data like solar wind speed, interplanetary magnetic field etc. are observed and correlated with Dst index. Thus, the two ways of investigations are compared and analyzed.