ARRL

ARRL Propagation Bulletin ARLP040 (1996)

SB PROP @ ARL $ARLP040
ARLP040 Propagation de KT7H

ZCZC AP60
QST de W1AW
Propagation Forecast Bulletin 40  ARLP040
From Tad Cook, KT7H
Seattle, WA  September 27, 1996
To all radio amateurs

SB PROP ARL ARLP040
ARLP040 Propagation de KT7H

Solar activity remains low, and in fact there were no visible
sunspots over the past week.  Average sunspot number is zero this
week, down from 1.6 of last week.  Solar flux was actually up
slightly, from 67.8 to 69.6.  Every day the solar flux was lower
than the 71 average for the previous 90 days.

Geomagnetic conditions were active over the past two weeks.  It was
the worst on September 20, when the A index was 37 and the K index
was five for half of the day.

Geomagnetic disturbances are expected to slack off through the end
of the month, and the A index should be below 10 from October 2 to
6.  Solar flux should remain flat near 70 until the end of the
month, then dip down slightly until mid October, Look for recurring
disturbances around October 7 to 8, although it should not be as bad
as it was over the past two weeks.

Sunspot Numbers for September 19 through 25 were 0, 0, 0, 0, 0, 0
and 0, with a mean of 0.  10.7 cm flux was 69.2, 69.2, 69.8, 68.6,
69.9, 70 and 70.8, with a mean of 69.6.
NNNN
/EX