SB PROP @ ARL $ARLP014
ARLP014 Propagation de K7RA
ZCZC AP14
QST de W1AW
Propagation Forecast Bulletin 14 ARLP014
From Tad Cook, K7RA
Seattle, WA April 7, 2023
To all radio amateurs
SB PROP ARL ARLP014
ARLP014 Propagation de K7RA
Average solar flux and sunspot numbers were way down this week.
Sunspot numbers were down by half, from 112.6 last week to 53.4.
Average daily solar flux declined from 156.1 to 132.5.
Geomagnetic indicators were lower too. Average daily planetary A
index from 23.3 last week to 15 in this bulletin, and average daily
middle latitude A index from 13.7 to 11.7.
The April 1 middle latitude A index of 11 is my guess. The middle
latitude A index for April 1 was not available.
Predicted solar flux is 140 on April 7 and 8, 135 on April 9 to 11,
140, 145 and 130 on on April 12 to 14, 130 on
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