SB PROP @ ARL $ARLP042
ARLP042 Propagation de K7RA

ZCZC AP42
QST de W1AW 
Propagation Forecast Bulletin 42 ARLP042
From Tad Cook, K7RA
Seattle, WA October 20, 2023
To all radio amateurs 

SB PROP ARL ARLP042
ARLP042 Propagation de K7RA

Sunspot activity dropped dramatically this week, with only two new
sunspot groups emerging, on October 14 and 16.

Compared to last week, the average daily sunspot number slipped from
144.1 to 89.4, and average daily solar flux from 159.1 to 145.1.

Average daily planetary A index changed from 7.6 to 6.4, and average
daily middle latitude A index from 8.3 to 5.

Predicted solar flux is 128 and 130 October 20-21, 132 on October
22-23, 134 on October 24-25, 136 on October 26, 145 on October
27-28, 150 on October 29 through November 5, 140 on November 6-9,
135 on November 10-11, 145 and 
		
		... 
		
			Читать дальше »