ИСТИНА

Storm time substorms are ordinarily considered as the source of the seed population of energetic electrons, which are additionally accelerated during storm and form an outer radiation belt (ORB). A number of observations, however, show that large magnetospheric substorms can lead to the appearance of relativistic electrons without magnetic storms. Such substorms in accordance with Vorobjev et al. (2018) lead to the noticeable decrease of the SYM-H index of geomagnetic activity, which shows the deep connection of processes leading to substorms and storms. The clarification of such connection became possible based on the analysis of storm time substorms, which provide dispersionless energetic electron injection deep inside the magnetosphere to the Earth from the geosynchronous orbit. Injected energetic electrons are additionally accelerated by betatron mechanism during storm recovery phase and form ORB population. Important part of such analysis is the study of plasma sheet turbulence, processes during substorm onset and first auroral arc brightening. We try to show that the obtained results provide the reason to reanalyze the role of the auroral processes in the ORB formation.