Abstract Details


Name: Aswin Amirtha Raj S
Affiliation: Arul Anandar College
Conference ID: TVS202510298
Title: Sunspot-Associated Halo CMEs of Solar Cycle 24: Linking SHARP Parameters with CME Velocity
Authors and Co-Authors:
Abstract Type: Contributory Presentation
Abstract: Halo Coronal Mass Ejections (CMEs) are among the most significant drivers of space weather disturbances, and understanding their origin is critical for improving predictive capabilities. In this study, we analyze sunspot-associated halo CMEs of Solar Cycle 24 to explore the relationship between CME velocity and the Space-weather HMI Active Region Patches (SHARP) parameters derived from SDO/HMI data, focusing specifically on the 12-hour interval prior to CME onset. Our aim is to assess whether magnetic field information encoded in SHARP parameters of the source region can serve as a reliable precursor for predicting the initial CME velocity before ejection. Consistent with earlier findings, we note that fast CMEs show a direct correlation with their source region properties, reinforcing the role of strong magnetic activity in driving high-velocity eruptions. Interestingly, for slow CMEs, we identify a negative correlation between their velocities and the associated SHARP parameters of the source active regions. This suggests that SHARP-based diagnostics may offer predictive potential for slow CME dynamics. These results provide new insights into the link between active region magnetic properties and CME kinematics and highlight the possibility of improving CME velocity forecasts by incorporating pre-eruption SHARP parameter analysis.