Simulation of the outer radiation belt electron flux decrease during the March 26, 1995, magnetic storm

In this paper we study the variation of the relativistic electron fluxes in the Earth's outer radiation belt during the March 26, 1995, magnetic storm . Using observations by the radiation environment monitor (REM) on board th e space technology research vehicle (STRV-1b), we discuss the flux decrease and possible loss of relativistic electrons during the storm main phase. I n order to explain the observations we have performed fully adiabatic and g uiding center simulations for relativistic equatorial electrons in the nons tationary Tsyganenko96 magnetospheric magnetic field model. In our simulati ons the drift of electrons through the magnetopause was considered as a los s process. We present our model results and discuss their dependence on the magnetospheric magnetic and electric field model, as well as on the presto rm fluxes used in the simulations.