The K7RA Solar Update

Sunspots finally returned on September 29, after over two weeks with none.

Average daily sunspot numbers increased from 0 to 9.6, and average daily solar flux increased from 67.9 to 68.4 over the past week, September 27 through October 3.

Average daily planetary A index declined from 10.9 to 7.7, while average mid-latitude A index changed from 7.9 to 6.1.

Predicted solar flux is 68 on October 5-18, 70 on October 19 through November 2, 68 on November 3-14, and 70 on November 15-18.

Predicted planetary A index is 5 on October 5-6, 20 on October 7-8, 12 on October 9-10, then 10, 8, 5, 12 and 8 on O ... Читать дальше »

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SB PROP @ ARL $ARLP039
ARLP039 Propagation de K7RA

ZCZC AP39
QST de W1AW 
Propagation Forecast Bulletin 39 ARLP039
From Tad Cook, K7RA
Seattle, WA September 28, 2018
To all radio amateurs 

SB PROP ARL ARLP039
ARLP039 Propagation de K7RA

The Sun remained spotless over the past week, and by September 27
the period with no sunspots was over two weeks. Average daily solar
flux declined from 68.6 to 67.9. Average planetary A index increased
from 9.7 to 10.9, while average mid-latitude A index declined from
8.3 to 7.9.

Predicted solar flux is 68 on September 28 to October 2, 70 on
October 3-10, 68 on October 11-28, 70 on October 29 through November
6, and 68 on November 7-11.

Predicted planetary A index is 5 on September 28-30, then 8 and 12
on October 1-2, 5 on October 3-6, then 20, 35 and 10 on October 7-9,
18, 15 and 8 on October 10-
		
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