Many of us are nearly giddy with joy over the recent steady increase in sunspot activity that seems long overdue. Average daily sunspot numbers rose more than 10 points this week compared to last -- from 21.1 to 31.4! The monthly average daily sunspot numbers for September, October and November were 6.6, 7 and 7.7, so this is quite a large jump. Sunspot numbers for December 17-23 were 24, 20, 43, 42, 42, 26 and 23, with a mean of 31.4. The 10.7 cm flux was 86.9, 84.2, 81.7, 83.7, 82.7, 82.2 and 78.4, with a mean of 82.8. The estimated planetary A indices were 1, 2, 1, 1, 1, 2 and 2, with a mean of 1.4. The estimated mid-latitude A indices were 2, 2, 0, 2, 1, 2 and 3, with a mean of 1.7.
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