SB PROP @ ARL $ARLP018
ARLP018 Propagation de K7RA

ZCZC AP18
QST de W1AW 
Propagation Forecast Bulletin 18 ARLP018
From Tad Cook, K7RA
Seattle, WA May 4, 2018
To all radio amateurs 

SB PROP ARL ARLP018
ARLP018 Propagation de K7RA

Sunspots disappeared again this week, with a blank Sun on April 28,
and continuing on every day since.

Average daily sunspot numbers dropped from 20 to 3.6, while average
daily solar flux decreased from 73.4 to 69.3.

Average daily planetary A index declined from 11.9 to 4.4 and
average mid-latitude A index went from 8.6 to 5.

Predicted solar flux is 67 on May 4-5, 68 on May 6, 69 on May 7-10,
68 on May 11-13, 70 on May 14-28, 68 on May 29 through June 9, and
70 on June 10-17.

Predicted planetary A index is 5 on May 4-5, then 18, 22, 16, 12 and
8 on May 6-10, 5 on May 11-16, then 42, 12 and 8 on May 17-19, 5 on
May 20 through June 1, then 8
		
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