ARRL

ARRL Propagation Bulletin ARLP015 (1996)

 SB PROP @ ARL $ARLP015
ARLP015 Propagation de KT7H

ZCZC AP36
QST de W1AW
Propagation Forecast Bulletin 15  ARLP015
From Tad Cook, KT7H
Seattle, WA  April 12, 1996
To all radio amateurs

SB PROP ARL ARLP015
ARLP015 Propagation de KT7H

The Sun is spotless.  There have been no visible sunspots for six
of the past seven days, and the average solar flux is a point lower
than last week.  As mentioned in ARLP014, we should be at the
beginning of the sunspot minimum, and the solar flux minimum should
occur later this year.

The last propagation bulletin had a confusing error which mentioned
both 158 and 192 as the solar flux for April, 1999.  Actually 192
is the projected average solar flux for April, 2000.

This month the geomagnetic field should stay stable, but April 17
and 18 could bring a recurring moderate disturbance.  The solar
flux should rise above 70 by April 18 through 24, and go back below
70 after May 3.

Sunspot Numbers for April 4 through 10 were 11, 0, 0, 0, 0, 0 and
0, with a mean of 1.6.  10.7 cm flux was 70.2, 69.9, 68.7, 68.4,
68.4, 69 and 68.8, with a mean of 69.1.
NNNN
/EX