Characteristic behavior of high-energy magnetospheric electrons from 1987 to 2007

The daily fluence is selected as the main characteristic of the behavior of electrons with E > 2 MeV measured by GOES satellites in geostationary orbits, since this characteristic is closely associated with malfunctions of satellite electronic equipment. It is shown that increases in the flux of high-energy magnetospheric electrons are associated with considerable interplanetary and magnetospheric perturbations, but lag behind them by 1–3 days. A greatly increased solar wind speed is observed as early as 3 days before the electron flux starts to grow, with a maximum being reached by the onset of growth. It is shown that the electron fluence is weakly associated with the level of geomagnetic activity on the same day but correlates to the А р index of geomagnetic activity observed 2–3 days earlier. The fluence of high-energy magnetospheric electrons is closely associated with the solar wind’s speed, especially with its value measured 2 days earlier.