Modulation of Locally Generated Equatorial Noise by ULF Wave

TitleModulation of Locally Generated Equatorial Noise by ULF Wave
Publication TypeJournal Article
Year of Publication2019
AuthorsZhu, H, Chen, L, Liu, X, Shprits, YY
JournalJournal of Geophysical Research: Space Physics
Date Published04/2019
Keywordslinear growth rate; magnetosonic waves; Radiation belts; ULF waves; Van Allen Probes
AbstractIn this paper we report a rare and fortunate event of fast magnetosonic (MS, also called equatorial noise) waves modulated by compressional ultralow frequency (ULF) waves measured by Van Allen Probes. The characteristics of MS waves, ULF waves, proton distribution, and their potential correlations are analyzed. The results show that ULF waves can modulate the energetic ring proton distribution and in turn modulate the MS generation. Furthermore, the variation of MS intensities is attributed to not only ULF wave activities but also the variation of background parameters, for example, number density. The results confirm the opinion that MS waves are generated by proton ring distribution and propose a new modulation phenomenon.
Short TitleJ. Geophys. Res. Space Physics

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