SB PROP @ ARL $ARLP037
ARLP037 Propagation de K7RA

ZCZC AP37
QST de W1AW 
Propagation Forecast Bulletin 37 ARLP037
From Tad Cook, K7RA
Seattle, WA September 10, 2021
To all radio amateurs 

SB PROP ARL ARLP037
ARLP037 Propagation de K7RA

Sunspot activity increased dramatically this week.

Sunspot numbers (when looking at only the activity during our
Thursday through Wednesday reporting week) peaked at 87 on
Wednesday, September 8 and the day before, solar flux peaked at
101.2.

Average daily sunspot numbers rose 14, to 64.6, while average daily
solar flux increased from 88 to 92.9. New sunspots appeared on
September 2, again on September 3, and three more new sunspot groups
arrived on September 4. Another new one appeared on September 8,
and on that day the total sunsp
		
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