Coronal mass ejections and sunspot number over solar cycle 24

Abstract In this article we work with the coronal mass ejections (CMEs) and sun spot number (SSN) during solar cycle 24 i.e. from 2008-2019. We have to take in to considerations that the CMEs have velocity >= 500 km/s and acceleration ~2000m/sec^2. To see the relation between these parameters we have extract the SSN from Sunspot Index and Long-term Solar Observations (SILSO), while CMEs number observations made by the Large Angle and Spectrometric Coronagraph (LASCO) on board the Solar and Heliospheric Observatory mission (SOHO). We have observed 1290 total CMEs for the current period. Out of these the rate of halo CMEs and partial halo CMEs are 35.34% and 64.65% respectively. The SSN are 132 for the current period. To conduct the investigation between CMEs and SSN we have performed statistical investigation between these parameters. To perform the statistical investigation taken the monthly averaged value of CMEs velocity and average value of SSN. The analysis of the results indicated that CMEs of different categories have mutual correlation with SSN. The correlation coefficients of halo and partial halo CMEs with SSN are 0.43 and 0.42 respectively. Keywords: – Coronal mass ejections, Sunspot number, halo CMEs, Partial halo CMEs, Solar cycle. Preetam Singh Gour¹, Savita², Devangana Shyamlan Chaturvedi^3*