SB PROP @ ARL $ARLP026
ARLP026 Propagation de K7RA

ZCZC AP26
QST de W1AW 
Propagation Forecast Bulletin 26 ARLP026
From Tad Cook, K7RA
Seattle, WA June 26, 2020
To all radio amateurs 

SB PROP ARL ARLP026
ARLP026 Propagation de K7RA

No sunspots were observed since June 15, when the daily sunspot
number was 11. This does not mean there were 11 sunspots seen, but
instead it means that one sunspot group was observed containing one
sunspot. The sunspot number is derived by assigning 10 points for
each sunspot group, and one point for each sunspot. So 11 is the
minimum non-zero sunspot number.

On June 8 the daily sunspot number was 17, indicating 7 sunspots in
one group.

If those seven sunspots had been in two groups, the sunspot number
would be reported as 27.

Last week's bulletin Propagation Forecast Bulletin AR
		
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