RUSSIAN JOURNAL OF EARTH SCIENCES, VOL. 20, ES6008, doi:10.2205/2020ES000724, 2020

Figure 1. Distribution histogram of occurrence of different $K$-index values for 2005–2016 calculated with limit value of $K9=500$ nT (black) and 600 nT (grey). Borok observatory (BOX).

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Citation: Petrov Valery G., Roman I. Krasnoperov (2020), The aspects of K-index calculation at Russian Geomagnetic Observatories, Russ. J. Earth Sci., 20, ES6008, doi:10.2205/2020ES000724.

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