Relationship between Geomagnetic Index and Solar Wind Parameters

Abstract

Based on the monthly data of various solar and interplanetary parameters e.g. solar wind velocity, proton density, plasma temperature, IMF B(nt), sunspot numbers with geomagnetic index (Kp and Ap) from 1996 to 2009, detailed correlative study has been performed. We have reported the significant relationship among interplanetary plasma parameters for the 23 and rising phase of 24 solar cycles . We have also tried to investigate the correlative study of different solar and interplanetary parameters with Kp and Ap index. We have found that monthly average of geomagnetic index Kp and Ap are highly correlated with solar wind velocity, plasma temperature, IMF B(nt) while negative correlation between monthly average values of geomagnetic index Kp and Ap with proton density. We have also shows variation of geomagnetic indices with sunspot numbers and reported significant relationship between geomagnetic Kp and Ap index with sunspot numbers.