Proton flares and the topology of the magnetic field in the active regions of the Sun

[1] Events in flare productive active regions (ARs) accompanied by proton flares are considered on the basis of the observations from the ground and spacecrafts during the recent decades. The principal features of the morphology, magnetic fields, and substance mass motions in the ARs and also their variations with time are analyzed. All the considered ARs had a common feature in the magnetic field structure: a rather extended configuration of the delta type existed in them. The observations in the high-altitude expedition of the Sternberg Institute and the data from publications have been used.