Scattering by whistler-mode waves during a quiet period perturbed by substorm activity

We study the dynamics of radiation belt electrons during a 10-day quiet period perturbed by substorm activity and preceding high-speed stream (HSS), aiming at global description belts in L-shell, L [2, 6], energy [0.1, 10] MeV. combine Van Allen Probes observations Fokker-Planck numerical simulations pitch-angle diffusion. The model uses event-driven pitch angle diffusion coefficients from whistler-mode waves, built wave properties ambient plasma density measurements Probes. first find this event has some similar characteristics to regular times previously studied; widely extended plasmasphere within which we observe strong varying waves. These conditions lead scattering, contributes creation wide slot region as well significant decay outer belts, are observed qualitatively simulated. In addition, causes short duration (within ± 4h) lowering amplitude waves plasmasphere, both causing opposite effects terms This leads diminution time main activity. Conversely, become enhanced periods between injections. All cumulated, an enhancement above L~4.7 period. directly relates combination quietness allows diffusing up 1 MeV belt. Relativistic 1–2 remain trapped belt, L~5.2, forming, simulations, distinct pocket remnant electrons.