Articles | Volume 7, issue 4
https://doi.org/10.5194/gc-7-297-2024
https://doi.org/10.5194/gc-7-297-2024
Research article
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20 Dec 2024
Research article | Highlight paper |  | 20 Dec 2024

The Gannon Storm: citizen science observations during the geomagnetic superstorm of 10 May 2024

Maxime Grandin, Emma Bruus, Vincent E. Ledvina, Noora Partamies, Mathieu Barthelemy, Carlos Martinis, Rowan Dayton-Oxland, Bea Gallardo-Lacourt, Yukitoshi Nishimura, Katie Herlingshaw, Neethal Thomas, Eero Karvinen, Donna Lach, Marjan Spijkers, and Calle Bergstrand

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Executive editor
This work highlights the importance of data collected through citizen science for studying extreme geomagnetic storms. The Gannon storm was an unprecedented opportunity to test the limitations of citizen science data collection and to offer solutions to enable similar studies in the future. This study has great potential to be of interest to the wider public.
Short summary
We carried out a citizen science study of aurora sightings and technological disruptions experienced during the extreme geomagnetic storm of 10 May 2024. We collected reports from 696 observers from over 30 countries via an online survey, supplemented with observations logged in the Skywarden database. We found that the aurora was seen from exceptionally low latitudes and had very bright red and pink hues, suggesting that high fluxes of low-energy electrons from space entered the atmosphere.
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