Variability of solar cycles 22-24 in relation to cosmic ray intensity and geomagnetic parameters

In the present work, the study of length of solar cycle 22-24 has been presented in relation to the solar activity, cosmic ray intensity, interplanetary magnetic field and geomagnetic activity. We have studied the solar activity trends of sunspot number (SSN), geomagnetic activity amplitude planetary A-index (Ap), cosmic ray intensity (CRI) and interplanetary magnetic field (IMF) during solar cycles 22, 23 and 24 (till Dec.2014). We have studied the relation among simultaneous variations in cosmic ray intensity (Moscow NM), SSN, Ap and IMF during solar cycles 22, 23 & 24, and found the correlation coefficient. We then compared the relations between those obtained for the two previous solar cycles. We have observed certain peculiar features in cosmic ray modulation during the solar cycles 22-24. The focus of our study was to investigate whether this range is associated with a secular pattern in the length of the solar cycles 22,23 and 24 (SSN, CRI, gamogenetic activity and IMF) in the analysis of the long-term behaviour of the Sun. We have analysed archival data of SIG parameters from 1986 - 2014.