Speakers
Description
In this paper we have presented a statistical analysis of coronal mass ejections (CME) for the semi solar cycle 25 (year 2020 to year 2025). We used SOHO/LASCO catalogue for finding key parameters such as frequency of occurrence, speed, angular width, halo CMEs and correlated with solar activity indices such as sunspot numbers and solar cycle phase. We found that the narrow events were majorly skewed for angular width of CME which were exponentially obeyed. It was observed that during the solar maximum, there were various halo CMES (≈ 360°). A severe Geomagnetic storm was observed (kp = 9) May-2024 which was almost after 21 years (Last observed in 2003). The CME frequency during the advancing phase of solar cycle 25 was around 7.8 CMES per day in. early 2023 which is the highest monthly occurrence since LASCO'S Launch. The CME speeds were observed to be in between ~ 110 km/s to 2550 km/s with common speed being just over 500 km/s. During a statistical comparison between solar cycles 23 & 24, we found that solar cycle 24 through being weak in sunspot activities anomalously had a high CME rate when compared to solar cycle 23 due to lower heliospheric pressure. The same is what we saw has been followed in solar cycle 25 for being highly productive in CME frequency & halo events. (higher by ~30%). Асcordingly it is augmenting the adapting connection between CME activity & various long established solar indices. We have discussed the implication of the evolution's trends in space weather conjectures.
