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ARK_K_index
1
Arkhangelsk
DATE/TIME
Day of the year
1
Geomagnetic activity (World Data Center for Solar-Terrestrial Physics)
1
Geomagnetic observatory
K index
1
Lower limit for K = 9 (depends on the latitude of the observatory)
1
MAGOBS
1
Maximum fluctuation
1
Russia
Soviet data
1
Station label
1
Sum of 8 index values per day
1
geomagnetism
1
geophysics
historical data
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