Changes in the Distribution of Low-Energy Trapped Protons Associated with the April 17, 1965, Magnetic Storm

摘要

A study of the temporal variations of these fluxes associated with the April 17,1965, magnetic storm (sc 1313 UT April 17, main phase onset ~0200 UT April 18) shows a general redistribution of these protons for L > 2.5 and all sampled |B| ranges, which persisted for at least 36 days after the storm. The effect of the sudden commencement was a general depression in the intensities and a hardening of the energy spectrums, although the intensities recovered to their prestorm level during the initial phase.