Articles | Volume 43, issue 1
https://doi.org/10.5194/angeo-43-151-2025
https://doi.org/10.5194/angeo-43-151-2025
Regular paper
 | 
21 Feb 2025
Regular paper |  | 21 Feb 2025

Investigation of the occurrence of significant deviations in the magnetopause location: solar-wind and foreshock effects

Niklas Grimmich, Adrian Pöppelwerth, Martin Owain Archer, David Gary Sibeck, Ferdinand Plaschke, Wenli Mo, Vicki Toy-Edens, Drew Lawson Turner, Hyangpyo Kim, and Rumi Nakamura

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Cited articles

Aghabozorgi Nafchi, M., Němec, F., Pi, G., Němeček, Z., Šafránková, J., Grygorov, K., Šimůnek, J., and Tsai, T. C.: Magnetopause location modeling using machine learning: inaccuracy due to solar wind parameter propagation, Front. Astron. Space Sci., 11, 1390427, https://doi.org/10.3389/fspas.2024.1390427, 2024. a, b, c, d
Angelopoulos, V.: The THEMIS Mission, Space Sci. Rev., 141, 5–34, https://doi.org/10.1007/s11214-008-9336-1, 2008. a
Archer, M. O., Hartinger, M. D., Walsh, B. M., Plaschke, F., and Angelopoulos, V.: Frequency variability of standing Alfvén waves excited by fast mode resonances in the outer magnetosphere, Geophys. Res. Lett., 42, 10150–10159, https://doi.org/10.1002/2015GL066683, 2015a. a
Archer, M. O., Turner, D. L., Eastwood, J. P., Schwartz, S. J., and Horbury, T. S.: Global impacts of a Foreshock Bubble: Magnetosheath, magnetopause and ground-based observations, Planet. Space Sci., 106, 56–66, https://doi.org/10.1016/j.pss.2014.11.026, 2015b. a, b
Archer, M. O., Hietala, H., Hartinger, M. D., Plaschke, F., and Angelopoulos, V.: Direct observations of a surface eigenmode of the dayside magnetopause, Nat. Commun., 10, 615, https://doi.org/10.1038/s41467-018-08134-5, 2019. a
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Short summary
The boundary of Earth's magnetic field, the magnetopause, deflects and reacts to the solar wind, the energetic particles emanating from the Sun. We find that certain types of solar wind favour the occurrence of deviations between the magnetopause locations observed by spacecraft and those predicted by models. In addition, the turbulent region in front of the magnetopause, the foreshock, has a large influence on the location of the magnetopause and thus on the accuracy of the model predictions.
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