Earth System Science Data
Earth System Science Data
Earth System Science Data
Articles | Volume 13, issue 5
Articles | Volume 13, issue 5
https://doi.org/10.5194/essd-13-1987-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-13-1987-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 13, issue 5
Data description paper
 | 
11 May 2021
Data description paper |  | 11 May 2021

Historical K index data collection of Soviet magnetic observatories, 1957–1992

Natalia Sergeyeva, Alexei Gvishiani, Anatoly Soloviev, Lyudmila Zabarinskaya, Tamara Krylova, Mikhail Nisilevich, and Roman Krasnoperov

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Latest update: 12 Jul 2025
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Short summary
The K index is the classical, commonly used parameter of geomagnetic activity that serves as the measure of local magnetic field variations. This paper presents a unique collection of historical K index values that was formed at the World Data Center for Solar-Terrestrial Physics in Moscow. It includes the results of the K index determination at 41 geomagnetic observatories of the former USSR for the period from July 1957 to the early 1990s.
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