Abstract Details


Name: Swetha Gopinathan
Affiliation: Research Scholar
Conference ID: TVS202510277
Title: Sub-Photospheric Dynamics and Atmospheric Eruptions in Active Region NOAA 13842
Authors and Co-Authors: Swetha Gopinathan
Abstract Type: Contributory Presentation
Abstract: Active Region NOAA 13842 emerged on the solar disk in late September 2024 and quickly developed into one of the most magnetically complex and flare-productive regions of Solar Cycle 25. During its disk passage (29 September-10 October 2024), it evolved into a complex magnetic configuration and expanded to an area exceeding 1000 millionths of the solar hemisphere. The region produced numerous energetic events, including three X-class flares (X7.1 on 1 October, X9.0 on 3 October, and X2.1 on 7 October), as well as multiple M- and C-class flares, establishing it as a significant driver of solar activity and space weather disturbances. In this study, we investigate the magnetic evolution, flare productivity, and sub-surface fluid dynamics of AR 13842 by integrating multi-wavelength observations with local helioseismology techniques. Imaging and spectroscopic data from space- and ground-based observatories are employed to trace coronal emissions, chromospheric responses, and photospheric drivers, while helioseismic diagnostics provide constraints on sub-photospheric flows. Particular attention is given to signatures of magnetic flux emergence, shear flows, vorticity, and energy accumulation in the near-surface layers, and their possible role in triggering major flares. This comprehensive analysis provides new insights into the coupling between sub-surface dynamics and coronal energy release processes, thereby advancing our understanding of the mechanisms driving extreme solar activity and contributing to the broader effort of improving space weather forecasting capabilities.