Speaker
Description
In this study, we analyzed the structural and magnetic evolution of the active region NOAA 14366, using the Helioseismic and Magnetic Imager (HMI) on board the Solar Dynamics Observatory (SDO). The region was visible on the solar disk between January 31 and February 11, 2026. Characterized by an compact β-γ-δ magnetic configuration, it has produced a large number of major solar flares (6 X-class and 66 M-class solar flares), which places it in third place among the most productive active regions, in terms of flares, in the last five decades.
We focused our investigation on the X8.1-class solar flare that occurred on February 1, 2026. To understand its three-dimensional coronal magnetic topology, we reconstructed the coronal magnetic field using Valori's nonlinear force-free field magnetofrictional extrapolation (NLFFF) method. Finally, we compared the resulting three-dimensional coronal magnetic field, derived from photospheric observations, with coronal imaging data to assess the consistency of the reconstructed magnetic structure.