Abstract
In this paper we have considered correlative study of Cosmic Ray Intensity (CRI) variations with solar activity parameters such as interplanetary magnetic field (IMF), sunspot numbers (SSN) and solar flare index (SFI) during the period of 2009-2019. From the correlative study we have found that negative co-relation between Cosmic Ray Intensity (CRI) with interplanetary magnetic field (IMF), sunspot numbers (SSN) and solar flare index (SFI), with: ( i) Co-relation co-efficient -0.84 between Cosmic Ray Intensity and yearly average values of IMF, (ii) Co-relation co-efficient -0.94 between Cosmic Ray Intensity (CRI) and yearly average values of SSN, (iii) Co-relation co-efficient -0.95 between Cosmic Ray Intensity (CRI) and yearly average values of SFI.
Keywords: – Cosmic Ray Intensity (CRI), IMF, SSN and SFI.
Puspraj Singh1*, Nand Kumar Patel2, Shivgopal Singh3, Shiva Soni4