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Detailed Explorer 45 equatorial observations of the storm and poststorm structure of radiation-belt electrons (35 to 560 keV) for L values between 1.7 and 5.2 are presented. Injection during major storms results in electron pitch-angle distributions and radial profiles that are greatly distorted from their quiet-time equilibrium structure. Following storms, the pitch-angle distributions return to their prestorm shape over a period of several days. This shape is maintained as electron fluxes decay back to the quiet-time levels. The equatorial radial profiles slowly return to their prestorm equilibrium structure over a period of a few weeks and then maintain that structure.
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Lyons et al. (1975) studied this question.
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