EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Triple-point magnetic flux rope analysis for the 2020 April 19 CME observed in situ by Solar Orbiter, Bepi Colombo, and WIND

Andreas J. Weiss1,2, Christian Möstl1, Emma Davies4, Matthew J. Owens5, Tanja Amerstorfer1, Maike Bauer1,2, Jürgen Hinterreiter1,2, Rachel L. Bailey3, Martin A. Reiss1, Tim Horbury4, Helen O'Brien4, Vincent Evans4, Virginia Angelini4, Daniel Heyner6, Ingo Richter6, Uli Auster6, Werner Magnes1, and Wolfgang Baumjohann1
Andreas J. Weiss et al.
  • 1Space Research Institute, Austrian Academy of Sciences, Graz, Austria (
  • 2Institute of Physics, University of Graz, Universitätsplatz 5, 8010 Graz, Austria
  • 3Zentralanstalt für Meteorologie und Geodynamik, Hohe Warte 38, 1190 Vienna, Austria
  • 4Department of Physics, Imperial College London, London, UK
  • 5Space and Atmospheric Electricity Group, Department of Meteorology, University of Reading, Reading, UK
  • 6Technical University of Braunschweig, Braunschweig, Germany

We present initial results for a triple-point analysis for the in situ magnetic field measurements of a CME observed at three independent locations. On the 19th of April 2020, Solar Orbiter observed a CME in situ at a radial distance of around 0.8 au. This CME was subsequently also detected by the Wind and Bepi Colombo satellites closer to Earth. This triple in situ measurement of a CME provides us the unique opportunity to test the consistency of the measurements with our own 3D Coronal Rope Ejection (3DCORE) model. A triple measurement allows for up to seven different data combinations to be analyzed (three single-point, three dual-point, and one single triple-point combination) which gives us information on how our analysis pipeline responds to multi-point measurements and how the results change with measurements at differing radial and longitudinal distances. The goal of this study is to test whether all three in situ measurements can still be described by a slightly bent flux rope geometry and how adding additional measurements can improve the accuracy of inferred model parameters.

How to cite: Weiss, A. J., Möstl, C., Davies, E., Owens, M. J., Amerstorfer, T., Bauer, M., Hinterreiter, J., Bailey, R. L., Reiss, M. A., Horbury, T., O'Brien, H., Evans, V., Angelini, V., Heyner, D., Richter, I., Auster, U., Magnes, W., and Baumjohann, W.: Triple-point magnetic flux rope analysis for the 2020 April 19 CME observed in situ by Solar Orbiter, Bepi Colombo, and WIND, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-8878,, 2021.

Display materials

Display file

Comments on the display material

to access the discussion