SB PROP @ ARRL $ARLP015
ARLP015 Propagation DE KT7H
QST DE W1AW
Propagation Forecast Bulletin 15  ARLP015
From Tad Cook, KT7H
Seattle, WA  April 15, 1994
To All Radio Amateurs

Poor HF radio conditions persisted last week.  Sunspots began to
reappear after nearly a week of a spotless Sun, but solar flux
levels have remained low.

Solar flux was down below 75 almost every day last week.  When it
reached 72.6 on April 8 and 9, this was the lowest level of solar
flux since February, 1987, well on the other side of the current
solar cycle.

Expect more poor conditions with low solar activity and geomagnetic
conditions from minor to major storm.  Solar flux should slowly rise
to a peak around 100 at the end of the month, before dropping back
to current levels.  After next week geomagnetic conditions should
stabilize, but then return to stormy levels by the end of the month.
The unsettled conditions should continue well into May.

Sunspot Numbers from April 7 through 13 were 0, 11, 11, 14, 15, 17
and 21, with a mean of 12.7.  10.7 cm flux was 72.8, 72.6, 72.6,
75.3, 74.3, 73.9 and 73.9, with a mean of 73.6.

The projection for this week is from Seattle, Washington to
Venezuela.

80 meters should be open from 0200z to 1030z, peaking from 0330z to
1000z.  40 meters looks good from 0130z to 0900z, with the best
period around 0300z to 0830z.  Check 30 meters from 0000z to 0700z,
with best conditions after the Sun sets on both ends of the path.
20 meters looks good from 1830z to 0430z, with the best time toward
the end of that period.  17 meters may be open from 2000z to 2330z.
10, 12 and 15 meters do not look good at this time.
/EX