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 in the Siberian sector, ORB was displaced equatorward by more than 3 degrees that was ~2 degrees larger than that predicted by the IGRF-12 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 can contribute to an increase in the occurrence rate of mid-latitude auroras observed in the Eastern Hemisphere. We have analyzed 18 geomagnetic storms occurred from 2011 to 2018 and found that during some of them, the auroral precipitations were observed in close vicinity of Irkutsk and Paratunka. This exceptional cases support the conclusion about anomalous changes in secular variations of the geomagnetic field in the Siberian and Far East regions.