The K7RA Solar Update

Tad Cook, K7RA,
The average daily sunspot number declined to zero this week from 7.6 last week. Average daily solar flux was unchanged at 68.6, and the average daily planetary A index declined from 12.6 to 9.7, while average daily mid-latitude A index dipped from 10 to 8.3.
Based on NOAA predictions, solar flux is 68 on September 20 – 26; 69 on September 27 – October 1; 70 on October 2 – 9, and 69 on October 10 – 13.
Predicted planetary A index is 5 on September 20 – 22; 16 and 12 on September 23 – 24; 5 on September 25 – 30; 8 and 10 on October 1 – 2; 5 on October 3 – 6; 20, 30, 10, 18, 15, and 8 on October 7 – 12, and 5 on October 13.
Sunspot numbers for September 13 – 19 were 0, 0, 0, 0, 0, 0, and 0, with a mean of 0. The 10.7-centimeter flux was 69.6, 69, 68.5, 69.1, 67.8, 68.1, and 67.9, with a mean of 68.6. Estimated planetary A indices were 17, 16, 8, 6, 11, 6, and 4, with a mean of 9.7. Estimated mid-latitude A indices were 17, 11, 7, 5, 9, 5, and 4, with a mean of 8.3.

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