EGU2020-13767
https://doi.org/10.5194/egusphere-egu2020-13767
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Using In-Situ Juno Observations to Understand the Evolution of Interplanetary Coronal Mass Ejections Within 1 AU and Beyond

Emma Davies1, Robert Forsyth1, and Simon Good2
Emma Davies et al.
  • 1Space and Atmospheric Group, Department of Physics, Imperial College London, United Kingdom of Great Britain and Northern Ireland (emma.davies12@imperial.ac.uk)
  • 2Department of Physics, University of Helsinki, Finland

Understanding the evolution of interplanetary coronal mass ejections (ICMEs) as they propagate through the heliosphere is essential in forecasting space weather severity. Much of our knowledge of ICMEs has been gained using in-situ measurements from single spacecraft, although the increasing number of missions in the inner heliosphere has led to an increase in multi-spacecraft studies improving our understanding of the global structure of ICMEs. Whilst most such recent studies have focused on the inner heliosphere within 1 AU, Juno cruise phase data provides a new opportunity to study ICME evolution over greater distances. We present analysis of ICMEs observed in-situ both by Juno and at least one other spacecraft within 1 AU to investigate their evolution as they propagate through the heliosphere. Investigation of the sheath region and timing considerations between spacecraft allows for the general shape of the shock front to be reconstructed. Combining in-situ observations and results of flux rope fitting techniques determines the global picture of the ICME as it propagates. However, effects on in-situ observations due to radial evolution and due to the longitudinal separation between multi-spacecraft remain hard to separate. We note the importance of the interplanetary environment in which the ICME propagates and the need for caution in radial alignment studies.  

How to cite: Davies, E., Forsyth, R., and Good, S.: Using In-Situ Juno Observations to Understand the Evolution of Interplanetary Coronal Mass Ejections Within 1 AU and Beyond , EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-13767, https://doi.org/10.5194/egusphere-egu2020-13767, 2020

Displays

Display file