Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 39, issue 1
Articles | Volume 39, issue 1
https://doi.org/10.5194/angeo-39-69-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/angeo-39-69-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 39, issue 1
Regular paper
 | 
22 Jan 2021
Regular paper |  | 22 Jan 2021

Electron precipitation characteristics during isolated, compound, and multi-night substorm events

Noora Partamies, Fasil Tesema, Emma Bland, Erkka Heino, Hilde Nesse Tyssøy, and Erlend Kallelid

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Latest update: 13 Dec 2024
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Short summary
About 200 nights of substorm activity have been analysed for their magnetic disturbance magnitude and the level of cosmic radio noise absorption. We show that substorms with a single expansion phase have limited lifetimes and spatial extents. Starting from magnetically quiet conditions, the strongest absorption occurs after 1 to 2 nights of substorm activity. This prolonged activity is thus required to accelerate particles to energies, which may affect the atmospheric chemistry.
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Special Issue on the joint 19th International EISCAT Symposium...