The relation between the Earth's outer radiation belt dynamics and solar wind parameters at solar minimum according to data from EMP instrument aboard "Coronas-Photon"

The study of electron flux variations in the Earth's outer radiation belt (ERB) and their connection with solar processes is one of the important problems of the experiment with the instrument «Electron-M-Peska» aboard the solar observatory «Coronas-Photon». Data on relativistic and subrelativistic electron fluxes obtained by Electron-M-Peska in 2009 have been used to study the outer ERB dynamics at the minimum of solar activity (SA). Increases in the outer ERB relativistic electron fluxes observed at a height of 550 km after weak magnetic disturbances induced by high-speed solar-wind streams arriving at the Earth have been analysed. The geomagnetic disturbances caused by the high-speed solar wind streams and generating electron flux variations were insignificant; i.e., there were no considerable storms and substorms during that period, but a number of high-latitude ground-based stations observed an increase in wave activity. An assumption has been made that it was just wave activity that caused the variations in relativistic electron fluxes.