Sunspot
Merging and Fragmentation in the Solar Active Region 10930 Caused by Emerging Magnetic Flux Tube with Asymmetric Field-Line Twist Distribution along Its Axis
Chromospheric running wave from solar cyclone
MHD model of solar penumbral microjet
Characteristic development of magnetic shear in flare-producing sunspot
Flare-producing active region's evolution characterized by magnetic helicity
Emergence of partially split flux tube into solar atmosphere