Field-Aligned Current Density Accumulation in Response to the January ۱, ۲۰۲۵ Geomagnetic Storm

This study investigates the connection between geomagnetic storm activity, quantified by the Disturbance Storm Time (Dst) index, and the accumulation of field-aligned current (FAC) density in low-latitude ionospheric regions. We employ a coupled modeling framework that integrates the EUHFORIA heliospheric model with the Gorgon-Space magnetosphere-ionosphere simulation code. The results reveal that the most prominent FAC enhancements occur in the sunward sector (around ۱۲ MLT) during storm-time on ۱st January ۲۰۲۵. Our simulations demonstrate that significant FAC accumulation can occur even at low latitudes, underscoring the broader spatial influence of geomagnetic storms.

کلیدواژه ها:

CME ، EUHFORIA ، Gorgon_Space ، geomagnetic storm ، FAC ، Ionosphere