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DATE/TIME
4
Day of the year
4
Geomagnetic observatory
K index
4
Maximum fluctuation
4
Soviet data
4
Station label
4
Sum of 8 index values per day
4
geomagnetism
4
geophysics
4
historical data
4
Geomagnetic activity (World Data Center for Solar-Terrestrial Physics)
2
Geomagnetic activity World Data Center for Solar-Terrestrial Physics
2
Lower limit for K = 9 (depends on the latitude of the observatory)
2
Lower limit for K = 9 depends on the latitude of the observatory
2
MAGOBS
2
Russia
2
YAK_K_index
2
Yakutsk
2
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