SB PROP @ ARL $ARLP016
ARLP016 Propagation de K7RA

ZCZC AP16
QST de W1AW 
Propagation Forecast Bulletin 16 ARLP016
From Tad Cook, K7RA
Seattle, WA April 21, 2023
To all radio amateurs 

SB PROP ARL ARLP016
ARLP016 Propagation de K7RA

Again this week sunspot numbers and solar flux were higher than the
week before.

Average daily sunspot numbers more than doubled, from 70.6 to 146.9,
and average daily solar flux increased from 141 to 164.5. Both
figures represent a substantial increase in solar activity.

Planetary A index averages went from 7.6 to 8.1, while middle
latitude A index advanced from 6.4 to 7.3.

Three new sunspot groups emerged on April 13, one more on April 16,
and another on April 17.

Predicted solar flux over the next few weeks is 145, 140 and 135 on
April 21-23, 130 on April 24-25, 125 on April 26-2
		
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