ИСТИНА

Precipitation of energetic electrons from the outer radiation belt into the Earth's atmosphere are the bright manifestations of magnetospheric dynamics. These phenomena can be recorded directly on the polar low-altitude satellites of the POES and Meteor series. Balloon experiments also make it possible to detect invasions of energetic electrons at altitudes of 20-30 km using X-ray bremsstrahlung. Simultaneous observations of energetic electrons precipitations at different altitudes make it possible to better understand the physical mechanisms of this phenomenon, to establish magnetospheric sources of precipitations and their connections with the solar wind parameters and the level of geomagnetic activity. The development of the 01/02/15 - 06/02/15 event recorded in LPI (Lebedev Physical Institute) database of electron precipitations registered during the balloon experiments in the Murmansk region (L = 5.5) has been studied based on the measurements of electron fluxes on the satellites "Meteor M2", POES-18 and POES-19. The ratio of electron fluxes measured by the vertical and horizontal satellite detectors in the range from 0.1 to 0.7 MeV was used to identify particle precipitation corresponding to the events recorded during the balloon experiments. Precipitation were found on L-shells from 4 to 7 both in the northern hemisphere over the Murmansk region and in the southern, in the magnetically conjugated region. For each of the considered events the region in the magnetosphere is determined that is responsible for the scattering of electrons and their invasion in the Earth's atmosphere. A connection was established between data on particle fluxes and data on the interplanetary magnetic field and solar wind parameters which made it possible to make assumptions about the mechanisms of precipitation and explain their observed dynamics, as well as classify this event.