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DATE/TIME
5
Day of the year
5
Geomagnetic activity World Data Center for Solar-Terrestrial Physics
5
Geomagnetic observatory
K index
5
Lower limit for K = 9 depends on the latitude of the observatory
Maximum fluctuation
Soviet data
Station label
5
Sum of 8 index values per day
5
geomagnetism
5
geophysics
5
historical data
5
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