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2011•Geophysical Research LettersOpen access

SAID/SAPS-related VLF waves and the outer radiation belt boundary

Е. В. Мишин, J. M. Albert, Ondřej Santolík

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Abstract

[1] We explore Cluster and CRRES observations of plasmaspheric broadband hiss-like VLF emissions related with subauroral ion drifts/polarization streams (SAID/SAPS) to numerically simulate losses of energetic outer zone electrons due to wave-particle interactions. These emissions represent a distinctive subset of substorm/storm-related VLF activity in the region co-located with substorm injected energetic ions. Significant values of pitch-angle diffusion coefficients suggest that SAID/SAPS-related VLF waves could be responsible for the alteration of the outer radiation belt boundary during (sub)storms.

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[1] We explore Cluster and CRRES observations of plasmaspheric broadband hiss-like VLF emissions related with subauroral ion drifts/polarization streams (SAID/SAPS) to numerically simulate losses of energetic outer zone electrons due to wave-particle interactions. These emissions represent a distinctive subset of substorm/storm-related VLF activity in the region co-located with substorm injected energetic ions. Significant values of pitch-angle diffusion coefficients suggest that SAID/SAPS-related VLF waves could be responsible for the alteration of the outer radiation belt boundary during (sub)storms.

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Available abstract

[1] We explore Cluster and CRRES observations of plasmaspheric broadband hiss-like VLF emissions related with subauroral ion drifts/polarization streams (SAID/SAPS) to numerically simulate losses of energetic outer zone electrons due to wave-particle interactions. These emissions represent a distinctive subset of substorm/storm-related VLF activity in the region co-located with substorm injected energetic ions. Significant values of pitch-angle diffusion coefficients suggest that SAID/SAPS-related VLF waves could be responsible for the alteration of the outer radiation belt boundary during (sub)storms.

Key concepts: Substorm, Hiss, Van Allen radiation belt, Geophysics, Plasmasphere, Physics, Electron, Van Allen Probes

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