Nonlinear Processes in Geophysics
Nonlinear Processes in Geophysics
NPG
Articles | Volume 31, issue 2
Articles | Volume 31, issue 2
https://doi.org/10.5194/npg-31-195-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/npg-31-195-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 31, issue 2
Research article
 | 
10 Apr 2024
Research article |  | 10 Apr 2024

Quantification of magnetosphere–ionosphere coupling timescales using mutual information: response of terrestrial radio emissions and ionospheric–magnetospheric currents

Alexandra Ruth Fogg, Caitríona M. Jackman, Sandra C. Chapman, James E. Waters, Aisling Bergin, Laurent Lamy, Karine Issautier, Baptiste Cecconi, and Xavier Bonnin

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Short summary
Auroral kilometric radiation (AKR) is a radio emission emitted by Earth. Due to the complex mixture of phenomena in the magnetosphere, it is tricky to estimate the time difference between the excitation of two systems. In this study, AKR is compared with indices describing Earth's system. Time differences between the excitation of AKR and the indices are estimated using mutual information. AKR feels an enhancement before the aurora but after more polar latitude features.
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