EGU21-3433
https://doi.org/10.5194/egusphere-egu21-3433
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Shock-induced radiation belt dynamics: Coordinated observations of drift echoes and ULF modulations in the dayside magnetosphere 

Xingran Chen, Qiugang Zong, Ying Liu, Yixin Hao, Suiyan Fu, Jie Ren, and Chao Yue
Xingran Chen et al.
  • Peking University, Institute of Space Physics and Applied Technology, China (xrchen@pku.edu.cn)

We employ conjunctive observations of particle fluxes and electromagnetic fields in the solar wind, magnetosheath, and dayside magnetosphere to investigate the radiation belt dynamics in response to the impingement of a fast forward interplanetary shock on 7 September 2017. Particularly, drift echoes associated with the one-kick acceleration caused by the shock-induced magnetosonic pulse and oscillations in the Pc 4 range associated with the azimuthally localized ULF waves are identified concurrently in the in-situ particle measurements obtained by the twin Van Allen Probes in the dayside outer radiation belt. Based on this observational evidence, we demonstrate that the radiation bet can be efficiently disturbed via the two mechanisms simultaneously by the shock arrival. We also depict the characteristic features to distinguish between the two mechanisms from an observational approach.

How to cite: Chen, X., Zong, Q., Liu, Y., Hao, Y., Fu, S., Ren, J., and Yue, C.: Shock-induced radiation belt dynamics: Coordinated observations of drift echoes and ULF modulations in the dayside magnetosphere , EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-3433, https://doi.org/10.5194/egusphere-egu21-3433, 2021.

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