EGU General Assembly 2022
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Juno Plasma Wave Observations at Ganymede

William Kurth1, Ali H. Sulaiman1, George B. Hospodarsky1, J Douglas Menietti1, Barry H. Mauk2, George Clark2, Frederick Allegrini2, Phil Valek3,4, John E. P. Connerney5, J Hunter Waite3, Scott J. Bolton3, Masafumi Imai6, Ondrej Santolik7, Wen Li9, Stefan Duling10, Joachim Saur10, and Corentin Louis11
William Kurth et al.
  • 1The University of Iowa, Physics & Astronomy, Iowa City, United States of America (
  • 2The Johns Hopkins University Applied Physics Laboratory, Laurel, MD, USA
  • 3Southwest Research Institute, San Antonio, TX, USA
  • 4Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas, USA
  • 5Goddard Space Flight Center, Greenbelt, MD, USA
  • 6Dept of Electrical Engineering & Information Science, National Inst. of Technology (KOSEN), Niihama College, Niihama, Ehime, Japan
  • 7Dept of Space Physics, Institute of Atmospheric Physics of the Czech Academy of Sciences, Prague, Czechia. (8) Faculty of Mathematics and Physics, Charles University, Prague, Czechia
  • 9Center for Space Physics, Boston University, Boston, MA, USA
  • 10Institute of Geophysics and Meteorology, University of Cologne, Cologne, Germany
  • 11School of Cosmic Physics, DIAS Dunsink Observatory, Dublin Institute for Advanced Studies, Dublin, Ireland

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 magnetotail/wake, and nightside and dayside regions in the main magnetosphere distinguished by their electron densities and associated variability. The main 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 magnetotail/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. 

How to cite: Kurth, W., Sulaiman, A. H., Hospodarsky, G. B., Menietti, J. D., Mauk, B. H., Clark, G., Allegrini, F., Valek, P., Connerney, J. E. P., Waite, J. H., Bolton, S. J., Imai, M., Santolik, O., Li, W., Duling, S., Saur, J., and Louis, C.: Juno Plasma Wave Observations at Ganymede, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-10441,, 2022.


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