Abstract We perform a superposed epoch analysis on two groups of selected geospace disturbance events, emerging from single and isolated interplanetary drivers, and resulting in either the enhancement or the depletion of the average relativistic electron Phase Space Density (PSD). We investigate the occurrence of behavioural/temporal patterns of solar wind and geomagnetic parameters, chorus and ULF Pc5 wave activity, and the source/seed electron PSD in the outer Van Allen radiation belt. Our results indicate that the source electron population of μ = 10 MeV/G exhibits a similar behaviour during both event groups, while the μ = 1 MeV/G population can be considered as negligible for the whole process of wave excitation and electron energisation. Moreover, events that result in relativistic electron enhancement are characterised by statistically stronger and prolonged storm, substorm and wave activity, combined with an abundance of seed electrons of μ = 100 MeV/G, mostly at L* = 4–5, the nominal heart of the outer radiation belt.

中文翻译：

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源/种子电子和波粒相互作用在外范艾伦带中产生相对论电子 PSD 增强的相互作用

摘要 我们对两组选定的地球空间扰动事件进行了叠加历元分析，这些事件来自单个和孤立的行星际驱动器，导致平均相对论电子相空间密度 (PSD) 的增强或耗尽。我们研究了太阳风和地磁参数、合唱和 ULF Pc5 波活动以及外范艾伦辐射带中的源/种子电子 PSD 的行为/时间模式的发生。我们的结果表明，μ = 10 MeV/G 的源电子群在两个事件组中表现出相似的行为，而 μ = 1 MeV/G 群在波激发和电子激励的整个过程中可以被认为可以忽略不计。而且，