CREATION OF SOLAR PROTON BELTS DURING MAGNETIC STORMS: COMPARISON OF TWO MODELS

After strong magnetic storms enhanced fluxes of trapped proton with energy 1-20 MeV were registered at L=2-4. Solar cosmic rays are regarded as a source of this new proton population. There are two mechanisms proposed for the explanation how SCR became trapped. The first mechanism suggests that particles are radially injected into the inner magnetosphere at the beginning of the magnetic storm by the electric pulse induced by SC compression of the magnetosphere. By the second mechanism SCR penetrates directly to the inner magnetosphere during the main phase of the magnetic storm and during the recovery phase remains at the closed drift shells if the recovery of the magnetosphere is fast enough compared with particle magnetic drift period. Detailed analysis of the particle dynamics during two magnetic storms based on low-altitude satellites CORONAS-F and SERVIS-1 presented in this paper shows that it is direct trapping during recovery phase which is responsible for the enhanced proton radiation belts arriving after the strong magnetic storms