We present a clear case study on the occurrence of two successive X-class flares, including
a decade-class flare (X9. 3) and two coronal mass ejections (CMEs) triggered by shearing …

Context. Flares and coronal mass ejections (CMEs) are solar phenomena that are not yet
fully understood. Several investigations have been performed to single out their related …

We study the magnetic field evolution in AR 12371, related to its successive eruptive nature.
During the disk transit of seven days, the active region (AR) launched four sequential fast …

We analyze the multiwavelength observations of an M2. 9/1N flare that occurred in the active
region (AR) NOAA 11112 in the vicinity of a huge filament system on 16 October 2010 …

Analysis of a time series of high spatial resolution vector magnetograms of the active region
NOAA 10930 available from the Solar Optical Telescope SpectroPolarimeter on board …

Exploring the origins of coronal helicity and energy, as well as determining the mechanisms
that lead to coronal energy release, is a fundamental topic in solar physics. Using MDI 96 …

We studied the temporal evolution of the magnetic topology of the active region (AR) 11158
based on the reconstructed three-dimensional magnetic fields in the corona. The non-linear …

We report a detailed event analysis of the M6. 6 class flare in the active region (AR) NOAA
11158 on 2011 February 13. AR 11158, which consisted of two major emerging bipoles …

We report the evolution of the magnetic field and its energy in NOAA active region 11158
over five days based on a vector magnetogram series from the Helioseismic and Magnetic …

Twist and connectivity of magnetic field lines in the flare-productive active region NOAA
10930 are investigated in terms of the vector magnetograms observed by the Solar Optical …