SB PROP @ ARL $ARLP013
ARLP013 Propagation de K7RA

ZCZC AP13
QST de W1AW 
Propagation Forecast Bulletin 13 ARLP013
From Tad Cook, K7RA
Seattle, WA March 31, 2023
To all radio amateurs 

SB PROP ARL ARLP013
ARLP013 Propagation de K7RA

Solar activity increased this week. Average daily sunspot number
rose from 68 to 112.6, and average daily solar flux changed from
145.6 to 156.1.

A new sunspot group emerged on March 24, two more on March 26 and
27, and three on March 29.

Due to solar wind and a geomagnetic disturbance at the beginning of
the reporting week, average daily planetary A index increased from
10.6 to 23.3, while average middle latitude A index went from 8.4 to
13.7. Many reports of aurora came in this week, some down to lower
latitudes in North America.

Predicted solar flux is 135 on March 31, 130 on Apri
		
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