ARRL

ARRL Propagation Bulletin ARLP034 (1996)

SB PROP @ ARL $ARLP034
ARLP034 Propagation de KT7H

ZCZC AP54
QST de W1AW
Propagation Forecast Bulletin 34  ARLP034
From Tad Cook, KT7H
Seattle, WA  August 16, 1996
To all radio amateurs

SB PROP ARL ARLP034
ARLP034 Propagation de KT7H

Average solar flux was down about five points over the past week.
Flux values are expected to stay quite low, and rise up above 70
next week around August 22.  After that it should peak around 76 on
August 29, and be back to 70 around September 4.  No big upsets are
expected, but there could be some minor geomagnetic activity around
August 27.

The Fall equinox is about five weeks away, and the days are
gradually getting shorter.  40 meters is the best nighttime band for
worldwide propagation, while 20 is best during the day.  We are
still suffering from very low solar activity at the bottom of the
current solar cycle, so MUFs are depressed.  Expect big improvements
over the next two years.

The September issue of QST has an informative article by N6BV on
advanced propagation prediction software.  An interesting one is
VOACAP, created for Voice of America, and available free from the
federal government via the web at http://www.voa.gov.  Click on
Other Services, and then Software Distribution after the opening
screen.

Sunspot Numbers for August 8 through 14 were 24, 20, 33, 30, 22, 16
and 30, with a mean of 25.  10.7 cm flux was 69.8, 70.2, 72.8, 72.9,
70.1, 69.6, and 68.8, with a mean of 70.6.
NNNN
/EX