A variety of dynamic behavior of multi-MeV electrons near the inner edge of the outer radiation belt has been revealed by detailed analysis of Van Allen Probes data. This study presents multi-MeV electron flux and phase space density (PSD) using Van Allen Probes data during two strong geomagnetic storms to reveal their energy-dependent dynamics in the outer belt, with dynamics occurring on timescales of hours to ∼1 week. Enhancements are shown down to L = 2.6, where ∼3 MeV electron populations are enhanced by an order of magnitude during one storm of study. Study of a second comparable storm shows rapid depletion of electron populations up to ∼7 MeV in the region 2.6 ≤ L ≤ 3. We also identify a local electron PSD peak at L ≈ 3 that slowly accumulates during quiet time and is rapidly depleted during an intense storm. Possible contributors to these dynamics are discussed.

中文翻译：

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外辐射带内边缘附近的多 MeV 电子动力学

通过对 Van Allen Probes 数据的详细分析，揭示了外辐射带内边缘附近多 MeV 电子的各种动态行为。本研究使用 Van Allen Probes 数据在两次强地磁暴期间展示了多 MeV 电子通量和相空间密度 (PSD)，以揭示它们在外带中依赖于能量的动态，动态发生在数小时到 1 周的时间尺度上。增强显示到L  = 2.6，其中在一次研究风暴中~3 MeV 电子群增强了一个数量级。对第二个类似风暴的研究表明，在 2.6 ≤ L  ≤ 3区域内电子群的快速消耗高达 ~7 MeV  。我们还确定了L处的局部电子 PSD 峰 ≈ 3 在安静时期缓慢积累，在强烈风暴期间迅速耗尽。讨论了这些动态的可能贡献者。