The topology and dynamics of the three-dimensional magnetic field in the solar atmosphere
govern various solar eruptive phenomena and activities, such as flares, coronal mass …

The largest concentrations of magnetic flux on the Sun occur in active regions. In this paper,
the properties of active regions are investigated in terms of the dynamics of magnetic flux …

This review on coronal mass ejections (CMEs) treats hydromagnetic issues posed by
observations, in order to relate CMEs to flares and prominence eruptions and to consider the …

We study a simple model for the solar dynamo in the framework of the Parker migratory
dynamo, with a nonlinear dynamo saturation mechanism based on magnetic helicity …

Using the photospheric magnetic and coronal observations of Solar Dynamics Observatory,
we studied the buildup and eruption of coronal nonpotential magnetic structure in emerging …

We examine the spatial and temporal relationship between chromospheric H flares and
photospheric current helicities in active regions. All of the data were obtained by the vector …

Abstract Using Solar Dynamics Observatory/Helioseismic and Magnetic Imager vector
magnetic field observations, we studied the relation between the degree of magnetic non …

We continue our attempt to connect observational data on current helicity in solar active
regions with solar dynamo models. In addition to our previous results about temporal and …

Solar magnetic fields exhibit hemispheric preference for negative (positive) helicity in
northern (southern) hemisphere. The hemispheric helicity rule, however, is not very strong …

The coronal mass ejections (CMEs) from the sun consist of the plasma and strong magnetic
fields (∼ 4–5 G at 1.3 R⊙) and generally, the fast CMEs are often associated with energetic …