Abstract Details


Name: Jayalekshmi G. L.
Affiliation: Not affiliated to an institution
Conference ID: TVS202510259
Title: Analysis of active regions causing CME driven geomagnetic storms of solar cycle 23
Authors and Co-Authors: Tarun Kumar Pant
Abstract Type: Contributory Presentation
Abstract: The solar surface exhibits a vast variety of solar activities that lead to major geomagnetic field variations. In understanding solar-terrestrial relationships, it is essential to identify the characteristics of solar sources of geomagnetic activities. Among these solar sources, the important and prominent ones are the active region driven coronal mass ejections that are known to produce more geomagnetic storms than storms from coronal holes. Exploring the characteristics of active regions associated with geomagnetic storms is significant for the early prediction of geomagnetic storms. This study analyzes solar source regions of 52 major (Dst≤-100) geomagnetic storms of Solar Cycle 23. Among these, 36 are single CME driven, 16 are multiple CME driven and that originated from active regions on the solar surface. Our study of the evolution of active region characteristics on five days prior to the day of occurrence of intense (-200