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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 33, issue 5
Ann. Geophys., 33, 519–524, 2015
https://doi.org/10.5194/angeo-33-519-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 33, 519–524, 2015
https://doi.org/10.5194/angeo-33-519-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

ANGEO Communicates 06 May 2015

ANGEO Communicates | 06 May 2015

Extremely intense (SML ≤–2500 nT) substorms: isolated events that are externally triggered?

B. T. Tsurutani et al.

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Latest update: 26 Sep 2020
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Short summary
Particularly intense substorms (SSS), brilliant auroral displays with strong >106A currents in the ionosphere, are studied. It is believed that these SSS events cause power outages during magnetic storms. It is shown that SSS events can occur during all intensity magnetic storms; thus power problems are not necessarily restricted to the rare most intense storms. We show four SSS events that are triggered by solar wind pressure pulses. If this is typical, ~30-minute warnings could be issued.
Particularly intense substorms (SSS), brilliant auroral displays with strong 106A currents in...
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