Articles | Volume 40, issue 1
Regular paper
21 Feb 2022
Regular paper |  | 21 Feb 2022

Spatio-temporal development of large-scale auroral electrojet currents relative to substorm onsets

Sebastian Käki, Ari Viljanen, Liisa Juusola, and Kirsti Kauristie

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Subject: Earth's ionosphere & aeronomy | Keywords: Auroral ionosphere
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Cited articles

Akasofu, S.-I.: The development of the auroral substorm, Planet. Space Sci., 12, 273–282, 1964. a, b
Amm, O. and Viljanen, A.: Ionospheric disturbance magnetic field continuation from the ground to the ionosphere using spherical elementary current systems, Earth Planets Space, 51, 431–440, 1999. a, b
Anderson, B., Takahashi, K., Kamei, T., Waters, C., and Toth, B.: Birkeland current system key parameters derived from Iridium observations: Method and initial validation results, J. Geophys. Res.-Space, 107, 1079,, 2002. a
Anderson, B., Korth, H., Waters, C., Green, D., Merkin, V., Barnes, R., and Dyrud, L.: Development of large-scale Birkeland currents determined from the Active Magnetosphere and Planetary Electrodynamics Response Experiment, Geophys. Res. Lett., 41, 3017–3025, 2014. a
Anderson, B. J., Takahashi, K., and Toth, B. A.: Sensing global Birkeland currents with Iridium® engineering magnetometer data, Geophys. Res. Lett., 27, 4045–4048, 2000. a
Short summary
During auroral substorms, the ionospheric electric currents change rapidly, and a large amount of energy is dissipated. We combine ionospheric current data derived from the Swarm satellite mission with the substorm database from the SuperMAG ground magnetometer network. We obtain statistics of the strength and location of the currents relative to the substorm onset. Our results show that low-earth orbit satellites give a coherent picture of the main features in the substorm current system.