Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 46547 10.2205/2020ES000724 ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ The aspects of K-index calculation at Russian Geomagnetic Observatories The aspects of K-index calculation at Russian Geomagnetic Observatories Petrov Valery G Petrov Valery G vpetrov@izmiran.ru Krasnoperov Roman I Krasnoperov Roman I Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation RAS ru Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation RAS ru Geophysical Center RAS ru Geophysical Center RAS ru 20 6 29 10 2021 https://rjes.ru/en/nauka/article/46547/view

One of the most widely used indices of geomagnetic activity is the K" role="presentation">K

One of the most widely used indices of geomagnetic activity is the K" role="presentation">K

 Geomagnetic observatories geomagnetic data magnetograms 𝐾-index 𝐾𝑝-index 𝐾9 limit Geomagnetic observatories geomagnetic data magnetograms 𝐾-index 𝐾𝑝-index 𝐾9 limit This work was supported by the Russian Science Foundation grant No. 17-77-20034. The authors wish to thank the team of the World Data Center for Solar-Terrestrial Physics in Moscow (Russia) (http://www.wdcb.ru/stp/index.en.html). This work employed data and services provided by the Shared Research Facility "Analytical Geomagnetic Data Center" of the Geophysical Center of RAS (http://ckp.gcras.ru/).

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