SB PROP @ ARRL $ARLP011
ARLP011 Propagation DE KT7H
QST DE W1AW
Propagation Forecast Bulletin 11  ARLP011
>From Tad Cook, KT7H
Seattle, WA  March 18, 1994
To All Radio Amateurs
 
Solar flux was down this past week, but geomagnetic disturbances
remained frequent.  The average daily Boulder A index was over 25
throughout the week.  This made HF communication spotty, but it
enhanced north-south propagation on the higher frequencies.
 
Look for solar flux to rise to about 110 around the end of the
month.  After April 4 the geomagnetic field is likely to become
quite disturbed again if the same active solar regions from four
weeks earlier again rotate into view.
 
Sunspot Numbers from March 10 through 16 were 56, 66, 78, 60, 35, 41
and 31, with a mean of 52.4.  10.7 cm flux was 88, 88.1, 92.8, 90.1,
87.2, 87.4 and 86.2, with a mean of 88.5.
 
The path projection for this week is from Springfield, Illinois to
Japan.
 
80 meters should be open from 0930z to 1200z, and 40 meters from
0800z to 1300z.  Check 30 meters around 0730z and again from 1230z
to 1430z.  On some days 20 meters should be open from 1400z to
1530z.  Check it again from 2100z to 0030z.  17 meters looks good
from 2130z to 0030z.  15 meters may be open some days from 2200z to
2330z.  12 and 10 meters do not look good over this path at this
time, unless the solar flux takes a sudden jump of 40 points or
more.
/EX