| Abstract : | Solar variability controls the structure of the heliosphere and produce changes in cosmic ray intensity. Based on the observation from Omniweb data centre for solar- interplanetary data and yearly / maonthly mean count rate of cosmic ray intensity (CRI) variation data from Oulu / Moscow neutron monitors (Rc=0.80 GV & Rc=2.42 GV) during 1996-2022 . It is observed that the during minimum phase of low Solar activity , sun is remarkably quiet and the strength of the interplanetary magnetic field has been falling off to new low levels , reduces the GCR entering inner- heliosphere and it is high anti-correlation (-0.78) between sunspot number & GCR flux. It is also found that 10.7 cm solar radio flux, velocity of solar wind and the strength and turbulence of the interplanetary magnetic field were positive correlated with each other and inverse correlated with count rate of cosmic ray intensity.
Keywords- Interplanetary magnetic field (IMF), Cosmic ray intensity (CRI), Solar activity (SA).
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