SB PROP @ ARL $ARLP020
ARLP020 Propagation de K7RA

ZCZC AP20
QST de W1AW 
Propagation Forecast Bulletin 20 ARLP020
From Tad Cook, K7RA
Seattle, WA May 19, 2023
To all radio amateurs 

SB PROP ARL ARLP020
ARLP020 Propagation de K7RA

This reporting week, May 11-17, average daily sunspot number was
nearly the same as last week, 118.6 compared to 119.3, only
marginally lower.

But average daily solar flux dropped from 167.8 to 143.2.

Geomagnetic indicators were quieter, both planetary and middle
latitude A index at 9.6. Last week the two numbers were 15.1 and
11.9, respectively.

What is the outlook for the next few weeks?

10.7 cm solar flux is forecast to have a peak of 165 on June 8.

The predicted numbers are 145 on May 19, 140 on May 20-21, 135 on
May 22-24, 140 on May 25-26, 145 on May 27, 155 on May 28-30, 160 o
		
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