SB PROP @ ARL $ARLP050
ARLP050 Propagation de K7RA

ZCZC AP50
QST de W1AW 
Propagation Forecast Bulletin 50 ARLP050
From Tad Cook, K7RA
Seattle, WA December 16, 2022
To all radio amateurs 

SB PROP ARL ARLP050
ARLP050 Propagation de K7RA

Heightened sunspot activity over the past week no doubt produced the
great conditions during last weekend's ARRL 10 Meter contest.

Compared to the previous seven days, average daily sunspot numbers
jumped from 85 to 136.9, while solar flux averages increased from
137.5 to 150.

Geomagnetic indicators were lower, with planetary A index decreasing
from 14.4 to 7.7, and middle latitude A index from 9.1 to 6.

Higher sunspot numbers and lower geomagnetic indicators is an ideal
combination for favorable HF propagation.

New sunspots appeared every day except December 12, with one new
		
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