SB PROP @ ARL $ARLP001
ARLP001 Propagation de K7RA
ZCZC AP01
QST de W1AW
Propagation Forecast Bulletin 1 ARLP001
From Tad Cook, K7RA
Seattle, WA January 4, 2019
To all radio amateurs
SB PROP ARL ARLP001
ARLP001 Propagation de K7RA
Sunspots returned with the New Year, with sunspot numbers of 13, 16
and 16 on January 1-3. The new region was AR2732, and the area of
the spot tripled each day, beginning at 10 millionths of the visible
solar disc, then tripling to 30 on Tuesday, and 90 on Wednesday.
This made the average daily sunspot number for the reporting week
(December 27 to January 2) 4.1, compared to 0 for the previous seven
days.
Average daily solar flux rose slightly from 70 to 70.4.
Average daily planetary A index rose from 4.9 to 9.3, and average
mid-latitude A index from 4 to 7.6.
Predicted solar flux fo
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Четверг, 14.08.2025, 03:50
