SB PROP @ ARL $ARLP039
ARLP039 Propagation de K7RA
ZCZC AP39
QST de W1AW
Propagation Forecast Bulletin 39 ARLP039
From Tad Cook, K7RA
Seattle, WA September 29, 2023
To all radio amateurs
SB PROP ARL ARLP039
ARLP039 Propagation de K7RA
Solar activity was up for this reporting week, September 21-27.
Eight new sunspot groups appeared, two on September 21, two more on
September 22, two more on September 25, another on September 26 and
another on September 27.
The average daily sunspot number jumped from 118.4 to 170.6, while
average daily solar flux went from 149.3 to 168.8.
The Autumnal Equinox was last weekend in the Northern Hemisphere, so
our Earth is bathed in equal amounts of solar radiation in both
hemispheres.
The average daily planetary A index went from 20.4 to 17, while
middle latitude numbers changed f
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Воскресенье, 20.07.2025, 03:16
