SB PROP @ ARL $ARLP047
ARLP047 Propagation de K7RA
ZCZC AP47
QST de W1AW
Propagation Forecast Bulletin 47 ARLP047
From Tad Cook, K7RA
Seattle, WA November 19, 2021
To all radio amateurs
SB PROP ARL ARLP047
ARLP047 Propagation de K7RA
New sunspots appeared on November 14 and 16, but solar activity was
lower and geomagnetic activity as well.
More recently, over November 16-18 the total sunspot area declined
from 330, to 270 to only 40 millionths of a hemisphere, the lowest
observed recently.
Average daily sunspot numbers declined from 36.4 last week to 30.9
in the recent reporting week, November 11-17.
Solar flux averages were off as well, to 80.8 this week compared to
89.1 in last week's Propagation Forecast Bulletin ARLP046.
Average daily planetary A index declined from 18 to 7, and average
middle latitud
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Четверг, 25.04.2024, 10:06
