Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 41, issue 2
Articles | Volume 41, issue 2
https://doi.org/10.5194/angeo-41-355-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-41-355-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 41, issue 2
Regular paper
 | 
12 Sep 2023
Regular paper |  | 12 Sep 2023

The record of the magnetic storm on 15 May 1921 in Stará Ďala (present-day Hurbanovo) and its compliance with the global picture of this extreme event

Eduard Koči and Fridrich Valach

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Short summary
We dealt with the most intense magnetic storm of the 20th century, which took place on 13–15 May 1921. It was also observed at Stará Ďala (present-day Hurbanovo). However, the record was not complete. We estimated the missing sensitivity scale values and presented the resulting digitized Stará Ďala’s data for 13–15 May 1921. The data were compared with the records from other observatories. The analysis suggests that the auroral oval got close to Stará Ďala in the morning hours on 15 May 1921.
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