The K7RA Solar Update

During the recent reporting week (December 14-20) the first six days had zero sunspots. On December 20 one new sunspot group appeared (2692) with a sunspot number of 16. The average daily sunspot number decreased from 6.9 during the previous seven days to 2.3.

Average solar flux increased from 71 to 71.5, average planetary A index went from 7.4 to 9.4, and maid-latitude A index increased from 5....

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