Volume : 5, Issue : 7, July - 2016

STUDY OF SEVERE GEOMAGNETIC STORM: SOLAR CYCLE 24

Radha Devi Singh

Abstract :

<p> According to present study in the whole period of ascending and descending phases of solar cycle 24,only one strongest geomagnetic storm occurred on 17 march 2015.we have seen that total 17 geomagnetic storms occurred during the span of 2008 to 2016 with disturbance time index (Dst<-100nT).It is observed that no sever (Dst< -200 nT)geomagnetic storm have been occurred during the rising phase of Solar Cycle 24.we found only two severe geomagnetic storm(Dst<-200nT) during time period of 2008 to May2016.As a result of Strongest storm the Dst decrease up to -223 nT has been investigated in number of ground based instruments. For this study we have investigated its properties in term of it’s Solar Sources, relation with interplanetary and geomagnetic parameters. It is found that this storm was associated with the passage of interplanetary Coronal Mass Ejection</p>