Relation between interplanetary parameters and geomagnetic field variations during solar cycle 24

Abstract

The Earth’s magnetosphere is highly dynamic with large scale variations due to energy coming from solar wind. The magnetosphere continuously readjusts itself to the ever-changing solar wind. This creates geomagnetic field variations. The relationship between solar wind parameters, such as solar wind speed (V), interplanetary magnetic field (B) and geomagnetic activity index (Ap) is studied in the present paper. The results show significant positive correlation between Ap index and solar wind parameters. But a very high correlation is found between the product VB and Ap index.