Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 40, issue 2
Articles | Volume 40, issue 2
https://doi.org/10.5194/angeo-40-217-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-40-217-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 40, issue 2
Regular paper
 | 
22 Apr 2022
Regular paper |  | 22 Apr 2022

Dayside magnetopause reconnection and flux transfer events under radial interplanetary magnetic field (IMF): BepiColombo Earth-flyby observations

Weijie Sun, James A. Slavin, Rumi Nakamura, Daniel Heyner, Karlheinz J. Trattner, Johannes Z. D. Mieth, Jiutong Zhao, Qiu-Gang Zong, Sae Aizawa, Nicolas Andre, and Yoshifumi Saito

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Latest update: 13 Oct 2025
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Short summary
This paper presents observations of FTE-type flux ropes on the dayside during BepiColombo's Earth flyby. FTE-type flux ropes are a well-known feature of magnetic reconnection on the magnetopause, and they can be used to constrain the location of reconnection X-lines. Our study suggests that the magnetopause X-line passed BepiColombo from the north as it traversed the magnetopause. Moreover, our results also strongly support coalescence creating larger flux ropes by combining smaller ones.
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