ARRL

ARRL Propagation Bulletin ARLP042 (1996)

SB PROP @ ARL $ARLP042
ARLP042 Propagation de KT7H

ZCZC AP62
QST de W1AW
Propagation Forecast Bulletin 42  ARLP042
From Tad Cook, KT7H
Seattle, WA  October 11, 1996
To all radio amateurs

SB PROP ARL ARLP042
ARLP042 Propagation de KT7H

Conditions continued flat last week, with still another 7 days of
no visible sunspots.  This has been going on for quite some time
now.   Currently the geomagnetic field is somewhat active, but it is
expected to quiet down until around October 17 to 20 and again
around the 23rd.  Solar flux should continue flat, rising slightly
to around 70, then declining again to the sixties at the beginning
of November.

Robert, WB5CRG sent email asking about A indices from a year ago and
suggested that they be included with each weekly bulletin.  Starting
today, the daily planetary A index will be listed along with the
daily sunspot and solar flux values.  Anyone wanting to contact the
author of this bulletin can send email to tad@ssc.com or packet
mail to KT7H@N7DUO.WA.USA.NOAM.

Sunspot Numbers for October 3 through 9 were 0, 0, 0, 0, 0, 0 and 0,
with a mean of 0.  10.7 cm flux was 69.6, 69.4, 68.5, 68.8, 68.3,
67.9 and 67.9, with a mean of 68.6.  Planetary A indices for the
same period were 13, 5, 3, 3, 4, 6, and 18, with a mean of 7.4.

Here is a path projection from Mid-USA to South America for this
weekend.  80 meters looks good from 0000z to 0930z, peaking around
0200 to 0830, 40 from 2300 to 1000, peaking from 0030 to 0830, 30
from 2230 to 0800, peaking from 0030 to 0230, 20 around 1430 and
again from 1930 to 0030, and 17 from 1500 to 2200.  15 meters should
be good most days from 1600 to 2130 and on some days 12 meters
should open from 1800 to 2030.

Using the same figures toward Eastern Europe, 80 meters looks good
from 2300 to 0430, peaking around 0130 to 0330, 40 from 0000 to
0300, 30 around 1330 or 1400 and 20 around 1430 to 1645, peaking at
1530.
NNNN
/EX