SB PROP @ ARL $ARLP021
ARLP021 Propagation de K7RA

ZCZC AP21
QST de W1AW 
Propagation Forecast Bulletin 21 ARLP021
From Tad Cook, K7RA
Seattle, WA May 25, 2018
To all radio amateurs 

SB PROP ARL ARLP021
ARLP021 Propagation de K7RA

Sunspot activity resumed this week, after no sunspots for seven
consecutive days. Average daily sunspot number was 7.7, rising from
6.4 in the previous reporting week. Average daily solar flux was
70.1, changed little from 70.2 last week.

According to Spaceweather.com, in 2018 56% of days so far have been
spotless.

Currently sunspot group 2710 and 2711 are active (2711 is growing),
and 2712 is about to emerge beyond the horizon. On May 23 50
one-millionths of the visible solar surface was covered by sunspots.
April 24 and 25 was the last time this level of activity was seen.
On April 21 and 22 the sunspot area numbers were 120 and 130.

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