SB PROP @ ARL $ARLP012
ARLP012 Propagation de K7RA

ZCZC AP12
QST de W1AW 
Propagation Forecast Bulletin 12 ARLP012
From Tad Cook, K7RA
Seattle, WA March 19, 2021
To all radio amateurs 

SB PROP ARL ARLP012
ARLP012 Propagation de K7RA

Average daily sunspot numbers this week rose just a little, from
18.4 to 19, and average daily solar flux changed from 78.9 to 78.1.
Solar activity remains low.

Note the vernal equinox, (the first day of spring in the Northern
Hemisphere) occurs at 0937 UTC on Saturday, March 20. Both the
Southern and Northern hemispheres will be bathed in approximately
equal amounts of solar radiation, which has a positive effect of HF
propagation.

On March 17 and 18, the daily sunspot number was only 12 on both
days, but the total sunspot area rose from 50 to 200
micro-hemispheres. Sunspot area was 
		
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