Disappearance of plasmaspheric hiss following interplanetary shock

Authors

Zhenpeng Su, University of Science and Technology of China
Hui Zhu, University of Science and Technology of China
Fuliang Xiao, Changsha University of Science and TechnologyFollow
Yuming Wang, University of Science and Technology of ChinaFollow
Chao Shen, Chinese Academy of Sciences, Beijing
Min Zhang, University of Science and Technology of China
Shui Wang, University of Science and Technology of China
C A. Kletzing, University of IowaFollow
W. S. Kurth, University of Iowa
G. B. Hospodarsky, University of Iowa
Harlan E. Spence, University of New HampshireFollow
Geoffrey Reeves, Los Alamos National LaboratoryFollow
H. O. Funsten, Los Alamos National LaboratoryFollow
J. B. Blake, Aerospace CorporationFollow
D. N. Baker, University of Colorado BoulderFollow
J. R. Wygant, University of Minnesota - Twin Cities

Abstract

Abstract 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.

Department

Physics

Publication Date

5-16-2015

Journal Title

Geophysical Research Letters

Publisher

American Geophysical Union Publications

Digital Object Identifier (DOI)

10.1002/2015GL063906

Document Type

Article

Recommended Citation

Z. Su, H. Zhu, F. Xiao, H. Zheng, Y. Wang, C. Shen, M. Zhang, S. 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, and J. R. Wygant, ‘Disappearance of plasmaspheric hiss following interplanetary shock’, Geophysical Research Letters, vol. 42, no. 9, pp. 3129–3140, May 2015.