Disappearance of plasmaspheric hiss following interplanetary shock

TitleDisappearance of plasmaspheric hiss following interplanetary shock
Publication TypeJournal Article
Year of Publication2015
AuthorsSu, Z, Zhu, H, Xiao, F, Zheng, H, Wang, Y, Shen, C, Zhang, M, Wang, S, Kletzing, CA, Kurth, WS, Hospodarsky, GB, Spence, HE, Reeves, GD, Funsten, HO, Blake, JB, Baker, DN, Wygant, JR
JournalGeophysical Research Letters
Date Published03/2015
KeywordsCyclotron instability; Cyclotron resonance; interplanetary shock; Landau damping; Plasmaspheric Hiss; Radiation belt; Van Allen Probes
AbstractPlasmaspheric hiss is one of the important plasma waves controlling radiation belt dynamics. Its spatiotemporal distribution and generation mechanism are presently the object of active research. We here give the first report on the shock-induced disappearance of plasmaspheric hiss observed by the Van Allen Probes on 8 October 2013. This special event exhibits the dramatic variability of plasmaspheric hiss and provides a good opportunity to test its generation mechanisms. The origination of plasmaspheric hiss from plasmatrough chorus is suggested to be an appropriate prerequisite to explain this event. The shock increased the suprathermal electron fluxes, and then the enhanced Landau damping promptly prevented chorus waves from entering the plasmasphere. Subsequently, the shrinking magnetopause removed the source electrons for chorus, contributing significantly to the several-hours-long disappearance of plasmaspheric hiss.
URLhttp://doi.wiley.com/10.1002/2015GL063906
DOI10.1002/2015GL063906
Short TitleGeophys. Res. Lett.


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