SB PROP @ ARL $ARLP005
ARLP005 Propagation de K7RA
ZCZC AP05
QST de W1AW
Propagation Forecast Bulletin 5 ARLP005
From Tad Cook, K7RA
Seattle, WA January 29, 2021
To all radio amateurs
SB PROP ARL ARLP005
ARLP005 Propagation de K7RA
Solar activity increased this week. We saw no spotless days, and
the average daily sunspot number rose from 14.7 to 28.1. Average daily
solar flux was up from 76.1 to 77.2.
Average daily planetary A index rose from 4 to 9.4 due to a minor
geomagnetic storm on Monday. On that day Alaska's High Latitude
College A index was 33.
Predicted solar flux for the next 30 days is 76, 75, 74 and 74 on
January 29 Through February 1, then 72, 70, 70 and 72 on February
2-5, 76 on February 6-10, 77 on February 11-20, 76 on February
21-24, 75 on February 25-27.
Predicted planetary A index is 5,
...
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