Disappearance of plasmaspheric hiss following interplanetary shock

Zhenpeng Su, Hui Zhu, Fuliang Xiao, Huinan Zheng, Yuming Wang, Chao Shen, Min Zhang, Shui Wang, C. A. Kletzing, W. S. Kurth, G. B. Hospodarsky, H. E. Spence, G. D. Reeves, H. O. Funsten, J. B. Blake, D. N. Baker, J. R. Wygant

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


Plasmaspheric 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. Key Points First report on shock-induced disappearance of plasmaspheric hiss Interruption of chorus access into plasmasphere by enhanced Landau damping Removal of source electrons for chorus by the shrinking magnetopause

Original languageEnglish (US)
Pages (from-to)3129-3140
Number of pages12
JournalGeophysical Research Letters
Issue number9
StatePublished - May 16 2015

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  • Landau damping
  • cyclotron instability
  • cyclotron resonance
  • interplanetary shock
  • plasmaspheric hiss
  • radiation belt

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