Electron fluxes in the breakup region according to measurements at Kosmos-426

Results of electron flux measurement conducted at KOSMOS-426 satellite within magnetosphere region, where breakup propagated, are analyzed. Maximum of electron fluxes with particle isotropic pinch-angular distribution measured with different pinch-angles is recorded in breakup region. Energy spectrum of 0.25-2 MeV electrons is harded near the boundary of radiation belt. Essential decrease of the intensity within latitude narrow range is marked during breakup in E≤1 keV energy electron fluxes behind the boundary of radiation belt