Tad Cook, K7RA, Seattle, reports: Sunspot activity persisted this week, although the numbers were a little lower. The average daily sunspot number declined from 124.4 to 110.1. Average daily solar flux slipped slightly, from 125 to 124. Average daily planetary A index went from 9.1 to 6.4, and average middle latitude numbers changed from 6.4 to 4.4.
New sunspot groups appeared on December 25, 26...
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New sunspot groups appeared on December 25, 26...
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