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The record of the magnetic storm on 15 May 1921 in Stará Äala and its compliance with the global picture of this extreme event
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The record of the magnetic storm on 15 May 1921 in Stará Äala and its compliance with the global picture of this extreme event
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Journal Article
The record of the magnetic storm on 15 May 1921 in Stará Äala and its compliance with the global picture of this extreme event
2023
Overview
This paper deals with the most intense magnetic storm of the 20th century, which took place on 13-15 May 1921. Part of this storm was observed in the magnetic declination and vertical intensity at Stará Äala, currently known as Hurbanovo. However, the sensitivity of the magnetometer was not determined there in the years when the storm occurred. Here, we estimated the sensitivity scale values on the basis of data from before and after the studied event. The resulting digitized Stará Äala's data for 13-15 May 1921 are the main contribution of this work. The data were also put into the context of the records from other observatories. The overall picture of the geomagnetic field variations compiled from the observations by worldwide observatories, including Stará Äala, suggests that the auroral oval got close to Stará Äala and other European mid-latitude observatories in the morning hours on 15 May 1921.
Publisher
Copernicus GmbH
Subject
