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 19, 2018
To all radio amateurs
SB PROP ARL ARLP042
ARLP042 Propagation de K7RA
Solar activity increased last week. Compared to the previous seven
days, average daily sunspot number increased from 1.6 to 12.6, while
average daily solar flux rose from 68.9 to 71. After six days with
sunspots making a re-appearance (October 12-17), there were no
sunspots on Thursday, October 18.
Sunspot area was listed at 0 on October 15-17, which means that the
area was less than 10 millionths of a solar hemisphere. See
ftp://ftp.swpc.noaa.gov/pub/indices/DSD.txt for daily sunspot area.
...
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