Outer radiation belt during a strong magnetic storm

Physics

Scientific paper

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Electron Flux Density, Magnetic Storms, Outer Radiation Belt, Satellite Observation, Cosmos Satellites, Electron Energy, Explorer 45 Satellite, Geomagnetism, Particle Acceleration, Protons, Ring Currents

Scientific paper

Cosmos-426 and Explorer-45 data on the intense magnetic storm of December 17, 1971 are analyzed and primary consideration is given to spatial and temporal variations of fluxes and spectra of trapped and precipitating high-energy electrons in the outer belt (at about L = 3-5) in relation to parameters of magnetospheric plasma, fields and radiation. The intensity of high-energy electrons decreases during ring-current formation and this decrease is associated with VLF emission in the magnetosphere. Electron acceleration was observed on the day side of the earth about 2.5 hours after the commencement of a series of substorms, while conditions for the fast precipitation of accelerated particles into the atmosphere were present on the evening side. The high intensity of high-energy electrons in the ring-current region was maintained after the end of the substorm in the maximum of the main phase of the magnetic storm.

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