SB PROP @ ARL $ARLP031
ARLP031 Propagation de K7RA

ZCZC AP31
QST de W1AW 
Propagation Forecast Bulletin 31 ARLP031
From Tad Cook, K7RA
Seattle, WA July 30, 2021
To all radio amateurs 

SB PROP ARL ARLP031
ARLP031 Propagation de K7RA

Solar activity slowed this week. Average daily sunspot number
declined to 33.9 this week (July 22 to 28) from 48.9 in last week's
report. Wednesday July 28 had no sunspots at all.

Average daily solar flux went from 81.3 to 83.

Geomagnetic indicators held steady, with average daily planetary A
index at 6.4 both last week and this week. Average daily middle
latitude A index went from 6.4 last week to 6.3 this week.

Predicted solar flux is 76 on July 30 and 31, then 74 on August 1,
72 on August 2 to 4, 74 on August 5 and 6, 75 on August 7 to 12,
then 78, 80, 82 and 85 on August 13 to
		
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