SB PROP @ ARL $ARLP021
ARLP021 Propagation de K7RA

ZCZC AP21
QST de W1AW 
Propagation Forecast Bulletin 21 ARLP021
From Tad Cook, K7RA
Seattle, WA May 21, 2021
To all radio amateurs 

SB PROP ARL ARLP021
ARLP021 Propagation de K7RA

Sunspot activity continues this week, although the average daily
sunspot numbers and solar flux have not really changed since last
week's report. This was not expected, because on the first day of
the reporting week in last week's Propagation Forecast Bulletin
ARLP020 there was no sunspot activity.

Average daily sunspot number hardly changed, from 21.1 to 20.3, and
average daily solar flux went from 74.3 to 74.2. I am surprised that
solar flux still remains below 80, since April 20.

Geomagnetic indicators were quiet, but values were slightly lower.

Average daily planetary A ind
		
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