SB PROP @ ARL $ARLP043
ARLP043 Propagation de K7RA

ZCZC AP43
QST de W1AW 
Propagation Forecast Bulletin 43 ARLP043
From Tad Cook, K7RA
Seattle, WA October 22, 2021
To all radio amateurs 

SB PROP ARL ARLP043
ARLP043 Propagation de K7RA

Solar activity declined last week, and on one day (October 17) there
were no sunspots at all. Most days this week had the minimum
non-zero sunspot number, which is 11, indicating a single sunspot
group containing a single sunspot.

Average daily sunspot number declined from 23.7 to 11.3, and average
daily solar flux dropped seven points from 85.6 to 78.6.

Geomagnetic indicators were quiet, with average planetary A index
declining from 12.4 to 8.4, and average middle latitude A index from
10.1 to 5.4. No middle latitude A index was available for October
16-18, so middle latitude A ind
		
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