Abstract Details


Name: Dr. Ram Ajor Maurya
Affiliation: NIT Calicut
Conference ID: TVS202510285
Title: Long-term Helioseismic Ring-Diagram Analysis of Sub-Photospheric Flows in Active Regions
Authors and Co-Authors:
Abstract Type: Contributory Presentation
Abstract: Local helioseismology, and in particular the ring-diagram analysis technique, has proven to be a powerful diagnostic tool for investigating the dynamics of the solar interior at localized spatial scales. Over the past two decades, this method has yielded significant results on sub-photospheric flows, structural perturbations, and their relation to solar magnetic activity, including systematic detections of converging and shearing flows beneath active regions, depth-dependent variations linked to sunspot evolution, and large-scale modulation of zonal and meridional flows over the solar cycle. These findings underscore the intricate coupling between interior dynamics and photospheric magnetism, with evidence that persistent vortical and converging flows may play a central role in the development and maintenance of strong magnetic regions. In this presentation, we consolidate the advances achieved through ring-diagram studies while focusing on the long-term evolution of sub-photospheric flow patterns beneath super-active regions, with analyses based on extended helioseismic datasets spanning multiple cycles. By tracking temporal changes in flow topologies across different evolutionary stages of strong active regions, we discuss their statistical association with major energetic phenomena, such as flares and coronal mass ejections, and explore possible flow signatures that could serve as predictive diagnostics of eruptive activity. Beyond synthesizing results to date, we propose a framework for systematic long-term helioseismic monitoring of active regions to better capture the persistence, depth dependence, and complexity of flow fields associated with the largest energy releases on the Sun. Such efforts are expected to provide both deeper physical insight into solar magneto-fluid dynamics and valuable constraints for space weather forecasting, thereby strengthening the link from helioseismic investigations to practical prediction of solar eruptive events.