SB PROP @ ARL $ARLP036
ARLP036 Propagation de K7RA

ZCZC AP36
QST de W1AW 
Propagation Forecast Bulletin 36 ARLP036
From Tad Cook, K7RA
Seattle, WA September 6, 2019
To all radio amateurs 

SB PROP ARL ARLP036
ARLP036 Propagation de K7RA

Old Solar Cycle 24 sunspots returned this week, but for only two
days (Sunday and Monday) with a sunspot number of 12. Average daily
solar flux increased from 66 reported in last week's Propagation
Forecast Bulletin ARLP035 to 67.4 this week.

Radiation from a coronal hole increased the average planetary A
index from 5.7 last week to 19.9 this week, with the level on
Saturday and Sunday at 38 and 45. In Fairbanks, Alaska's College A
index reached 59 and 86, and at one point on Sunday the K index was
8!

The College K index (a component measured every 3 hours, and used to
calc
		
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