Interplanetary Magnetic Field B y Controls the Magnetopause Location

We present a statistical study of interplanetary magnetic field (IMF) effects on the magnetopause location based on nearly 15,000 magnetopause crossings identified in the THEMIS A‐E, Magion 4, Geotail, and Interball‐1 satellite data. In order to exclude the dominant controlling role of the solar win...

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Bibliographic Details
Published in:Journal of geophysical research. Space physics 2023-05, Vol.128 (5)
Main Authors: Aghabozorgi Nafchi, M., Němec, F., Pi, G., Němeček, Z., Šafránková, J., Grygorov, K., Šimůnek, J.
Format: Article
Language:English
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Summary:We present a statistical study of interplanetary magnetic field (IMF) effects on the magnetopause location based on nearly 15,000 magnetopause crossings identified in the THEMIS A‐E, Magion 4, Geotail, and Interball‐1 satellite data. In order to exclude the dominant controlling role of the solar wind dynamic pressure, differences between observed and empirical model magnetopause distances are analyzed. We find that the magnetopause distance is significantly controlled by the IMF clock angle, not considered in the used empirical models. Furthermore, during very low Alfvén Mach numbers ( M A  
ISSN:2169-9380
2169-9402
DOI:10.1029/2023JA031303