SB PROP @ ARL $ARLP041
ARLP041 Propagation de K7RA

ZCZC AP41
QST de W1AW 
Propagation Forecast Bulletin 41 ARLP041
From Tad Cook, K7RA
Seattle, WA October 8, 2021
To all radio amateurs 

SB PROP ARL ARLP041
ARLP041 Propagation de K7RA

Sunspots were visible every day this week, but numbers were lower.
Average daily sunspot numbers declined from 58.4 to 30.7, and
average daily solar flux was down 2.9 points to 86.9.

Geomagnetic activity was a little higher, with average daily
planetary A index going from 7.3 to 8.1, and average daily middle
latitude A index from 6.3 to 6.7.

Friday, October 1 was affected by a solar flare from sunspot group
AR2871, driving the planetary A index to 15. This had a greater
effect at higher latitudes, with Alaska's College A index hitting 30
and 31 on Friday and Saturday. In the midd
		
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