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Magnetic storms are often corresponded by intense precipitation of energetic electrons from the outer radiation belt into the Earth's atmosphere. This phenomenon can be registered by polar LEO satellites as an enhancement of particle fluxes. Balloon experiments also allow to detect energetic electrons at altitudes of 20-30 km by X-ray bremsstrahlung. Simultaneous observations of energetic electrons precipitation 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 has been studied based on the measurements of electron fluxes on the satellites "Meteor M2", POES-18 and POES-19 located at different MLTs. The ratio of electron fluxes measured by the vertical and horizontal satellite detectors was used to identify particle precipitation corresponding to the event recorded during the balloon experiments on 02/02/15. Precipitation were detected on L-shells from 4 to 7 both in the northern hemisphere and in the southern, in the magnetically conjugated region. For each event the region in the magnetosphere responsible for the scattering of electrons and their penetration into the Earth's atmosphere was determined. It was shown, that in the storm maximum and during early recovery phase precipitation were caused by intensive wave-particle interaction taking place in the near-equatorial region with wide MLT and L ranges. Spatial changes of this region during 01/02/15 - 06/02/15 magnetic storm were determined.