ИСТИНА

Latitudinal location of the outer radiation belt (ORB) was determined during last 17 years from 2001 to 2018 with using NOAA/Polar-orbiting Operational Environmental Satellite observations of energetic electrons. It was found that the ORB was shifted a little (~1 degrees) in the European and North American sectors while in the Siberian sector, ORB was displaced equatorward by more than 3 degrees. The displacements corresponded qualitatively to the change of geomagnetic field predicted by the IGRF-12 model. However in the Siberian sector, the shift was found to be ~2 degrees larger than that predicted by the model. The equatorward shift became prominent after 2012 that might be related to a geomagnetic jerk occurred in 2012 – 2013. The displacement of ORB to lower latitudes in the Siberian sector can contribute to an increase in the occurrence rate of mid-latitude auroras observed in the Eastern Hemisphere.