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 16, 2021
To all radio amateurs 

SB PROP ARL ARLP016
ARLP016 Propagation de K7RA

On April 12 new sunspot group AR2814 appeared following five days of
no sunspots at all. Daily sunspot numbers on the following four days
were 16, 16, 17 and 22 bringing the average daily sunspot number for
this reporting week (April 8-14) to 7, from 6.4 last week. The April
15 sunspot number of 22 was not included in this average. So far in
2021, 39% of the days had no sunspots.

Geomagnetic indicators were quiet, with average daily planetary A
index declining slightly from 6.6 to 5.1. Likewise, middle latitude
A index changed from 5.6 to 4.1.

On April 14 Spaceweather.com reported a h
		
		... 
		
			Читать дальше »