ARRL

ARRL Propagation Bulletin ARLP017 (1995)

SB PROP @ ARL $ARLP017
ARLP017 Propagation de KT7H
 
ZCZC AP85
QST de W1AW  
Propagation Forecast Bulletin 17  ARLP017
>From Tad Cook, KT7H
Seattle, WA  April 15, 1995
To all radio amateurs 
 
SB PROP ARL ARLP017
ARLP017 Propagation de KT7H
 
The average solar flux was about the same last week as the week
previous, but for several days there were no visible sunspots.  From
April 5 through 9 the sunspot count was zero.  Over time we should
see more periods like this, as the current solar cycle enters what
probably is its final year.
 
Currently the A and K indices are quite low, indicating stable
conditions.  This should continue for another week, when a recurring
coronal hole appears around April 21 through 24.  The worst
conditions are predicted for April 22, with a possible A index
around 25.  Another possible troubled period is centered around
May 4.
 
Solar flux should is rising slightly and should stay around the mid
eighties through April 26, then dip slightly, and rise to around
eighty after May 1.
 
Sunspot Numbers for April 6 through 12 were 0, 0, 0, 0, 12, 18 and
32, with a mean of 8.9.  10.7 cm flux was 71.8, 70.6, 71.8, 73,
74.5, 78 and 81.9, with a mean of 74.5.
 
The path projection for this week is from the center of the
continental United States and from the West Coast to Scarborough
Reef, BS7H.
 
>From the center of the United States, 80 meters may be open briefly
from q190z to 1130z, and 40 meters from 1030z to 1230z.  Check 30
meters from 1130z to 1330z, and 20 meters from 1330z to 1600z.
 
>From the West Coast of the United states check 80 meters from 1030z
to 1330z, 40 meters from 1000z to 1430z, and 30 meters from 0830z to
1000z and again from 1330z to 1600z.  20 meters should be open from
0600z to 0830z and 1500z to 1600z.
NNNN
/EX