Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 33, issue 4
Articles | Volume 33, issue 4
https://doi.org/10.5194/angeo-33-505-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/angeo-33-505-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 33, issue 4
Regular paper
 | 
29 Apr 2015
Regular paper |  | 29 Apr 2015

A quantitative study of magnetospheric magnetic field line deformation by a two-loop substorm current wedge

A. V. Nikolaev, V. A. Sergeev, N. A. Tsyganenko, M. V. Kubyshkina, H. Opgenoorth, H. Singer, and V. Angelopoulos

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Latest update: 01 Nov 2025
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Short summary
In this study we use two-loop model SCW (SCW2L) to quantitatively investigate distortion of the ionospheric footpoint pattern in response to changes of different SCW2L parameters. Calculation results show that SCW-related footprint shifts result in formation of auroral bulge and westward travelling surge and may contribute to rotation of auroral streamers, and that SCW2L combined with the AM03 model nicely describes the azimuthal progression and the observed magnitude of the auroral expansion.
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