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The K7RA Solar Update

ARRL

Well-Known Member
Nov 15, 2008
10,591
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Still no sunspots, and again we saw a prediction for slightly higher solar flux slip away. If you go here and click on any forecast prior to April 14, you will see solar flux numbers at 72 predicted for the end of this month. But in the few days since then, any predicted values over 70 have vanished -- including another set of slightly higher numbers in late May. Sunspot numbers for April 9-15 were 0, 0, 0, 0, 0, 0 and 0 with a mean of 0. The 10.7 cm flux was 70.1, 69.4, 69.3, 69.3, 68.4, 69.4 and 69.4 with a mean of 69.3. The estimated planetary A indices were 12, 8, 9, 8, 4, 2 and 3 with a mean of 6.6. The estimated mid-latitude A indices were 9, 6, 7, 4, 3, 1 and 2 with a mean of 4.6.



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