EGU22-12423
https://doi.org/10.5194/egusphere-egu22-12423
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Multi-spacecraft Observations of Interplanetary Coronal Mass Ejections between 0.3 and 2.2 AU: Conjunctions with the Juno Spacecraft

Emma Davies1, Réka Winslow1, Camilla Scolini1, Robert Forsyth2, and Christian Möstl3
Emma Davies et al.
  • 1Institute for the Study of Earth, Ocean, and Space, University of New Hampshire, Durham, New Hampshire, USA (emma.davies@unh.edu)
  • 2Department of Physics, Imperial College London, London, UK
  • 3Space Research Institute, Austrian Academy of Sciences, Graz, Austria

We present a catalogue of 35 interplanetary coronal mass ejections (ICMEs) observed by the Juno spacecraft during its cruise phase to Jupiter in conjunction with at least one other spacecraft at heliocentric distances near or less than 1 AU (by MESSENGER, Venus Express, Wind, or STEREO). Previous ICME catalogues are used to find conjunctions between spacecraft, and events with magnetic field features that can be matched unambiguously across different spacecraft are selected. We conduct a multi-spacecraft analysis of ICME properties between 0.3 and 2.2 AU: we first investigate the global expansion of ICMEs by tracking the variation in magnetic field strength with increasing heliocentric distance of individual events, finding significant variability in magnetic field relationships for individual events in comparison with statistical trends. With the availability of plasma data at 1 AU, local and global expansion rates are compared; despite following expected trends, the local and global expansion rates are weakly correlated. Finally, for those events with clearly identifiable magnetic flux ropes, we investigate their magnetic complexity as they propagate; we find that 60% of events undergo at least one change in complexity between observations at the innermost spacecraft and Juno. The multi-spacecraft catalogue produced in this study provides a valuable link between ICME observations in the inner heliosphere and beyond 1 AU, contributing to our understanding of ICME evolution in situ. We intend the catalogue to be a useful resource for future studies of ICMEs and space weather research at Earth and other planets.

How to cite: Davies, E., Winslow, R., Scolini, C., Forsyth, R., and Möstl, C.: Multi-spacecraft Observations of Interplanetary Coronal Mass Ejections between 0.3 and 2.2 AU: Conjunctions with the Juno Spacecraft, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-12423, https://doi.org/10.5194/egusphere-egu22-12423, 2022.

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