Juno Plasma Wave Observations at Ganymede

W. S. Kurth, A. H. Sulaiman, G. B. Hospodarsky, J.D. Menietti B. H. Mauk, G. Clark, F. Allegrini, P. Valek, J. E. P. Connerney, J. H. Waite, S. J. Bolton, M. Imai, O. Santolik, W. Li, S. Duling, J. Saur, C. Louis

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13 Scopus citations


The Juno Waves instrument measured plasma waves associated with Ganymede’s magnetosphere during its flyby on 7 June, day 158, 2021. Three distinct regions were identified including a wake, and nightside and dayside regions in the magnetosphere distinguished by their electron densities and associated variability. The magnetosphere includes electron cyclotron harmonic emissions including a band at the upper hybrid frequency, as well as whistler-mode chorus and hiss. These waves likely interact with energetic electrons in Ganymede’s magnetosphere by pitch angle scattering and/or accelerating the electrons. The wake is accentuated by low-frequency turbulence and electrostatic solitary waves. Radio emissions observed before and after the flyby likely have their source in Ganymede’s magnetosphere.

Original languageEnglish (US)
Article numbere2022GL098591
JournalGeophysical Research Letters
Issue number23
StatePublished - Dec 16 2022

Bibliographical note

Funding Information:
The research at the University of Iowa is supported by NASA through Contract 699041X with Southwest Research Institute. JDM acknowledges support from NASA Grant 80NSSC19K1262. WL acknowledges NASA Grant 80NSSC20K0557. SD and JS have received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (Grant agreement No. 884711). OS has received support from MSMT grant LTAUSA17070. CKL's work at DIAS is funded by the Science Foundation Ireland Grant 18/FRL/6199.

Publisher Copyright:
© 2022. The Authors.


  • Ganymede
  • Juno
  • plasma waves

PubMed: MeSH publication types

  • Journal Article


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