SB PROP @ ARL $ARLP035
ARLP035 Propagation de K7RA

ZCZC AP35
QST de W1AW 
Propagation Forecast Bulletin 35 ARLP035
From Tad Cook, K7RA
Seattle, WA August 27, 2021
To all radio amateurs 

SB PROP ARL ARLP035
ARLP035 Propagation de K7RA

Sun watchers saw no days without sunspots this week. Average daily
sunspot numbers rose from 17.7 last week to 21.7 this reporting
week, August 19 through 25.

Average daily solar flux increased from 73.8 to 78.5.

Geomagnetic indicators were quiet, with average daily planetary A
index declining from 6.1 to 4.7, and average daily middle latitude A
index dropping from 7.6 to 5.7.

We are less than one month away from the Northern Hemisphere
autumnal equinox, on Wednesday, September 22, 2021. Both
hemispheres will be bathed in equal measures of solar radiation,
always a positive for HF p
		
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