Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 38, issue 6
Articles | Volume 38, issue 6
https://doi.org/10.5194/angeo-38-1159-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-38-1159-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 38, issue 6
Regular paper
 | 
03 Nov 2020
Regular paper |  | 03 Nov 2020

High-latitude crochet: solar-flare-induced magnetic disturbance independent from low-latitude crochet

Masatoshi Yamauchi, Magnar G. Johnsen, Carl-Fredrik Enell, Anders Tjulin, Anna Willer, and Dmitry A. Sormakov

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Latest update: 13 Dec 2024
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Short summary
The paper reports a new finding on space weather effects at around 70–75 ° geographic latitudes. We found that X flares cause an unexpectedly strong ionospheric current driven by solar flares. The effect is as large as a substorm that is known to cause strong auroras and may enhance ongoing substorms. However, it has been overlooked in the past due to the narrow latitudinal range at high latitudes. Since severe magnetic storms often occur with X flares, this may cause geomagnetic hazards.
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