Coronal Mass Ejections: Their Propagation and Associated Storms in the First Phase of Solar Cycle 25

Abstract

We have investigated of about 50 coronal mass ejections from 2022 to 2024 in first phase of solar cycle 25. We have investigated about the velocities, angular widths and central width of those coronal mass ejections. The interplanetary consequences of those ejections particularly to a height of 30 R_? in the range of sun-earth distance. The ejections mostly investigated have DST above -70nT, the ejections have affected the geomagnetics and have auroral onset in the lower latitudes. For each of the ejections these properties like the speed and kp were observed from the onboard SOHO SPACE mission by the LASCO coronagraphs. The ranges of velocities of the coronal mass ejections were from, about 400Km/sec to 900Km/sec. although some of the ejections have caused the high intense geomagnetic storms like in May 2024 but most of them have moderate storms in the magnetosphere. It has been found that as the solar cycle 24 saw less coronal mass ejections the ejections have shown some sharp rise as in the beginning of solar cycle 25.. We have also presented some consequences of interplanetary coronal mass ejections (ICMEs). Some of the halo CMEs with angular width (?180) .were also observed and investigated in this study.