ARRL

ARRL Propagation Bulletin ARLP031 (1995)

SB PROP @ ARL $ARLP031
ARLP031 Propagation de KT7H
 
ZCZC AP99
QST de W1AW  
Propagation Forecast Bulletin 31  ARLP031
From Tad Cook, KT7H
Seattle, WA  July 21, 1995
To all radio amateurs 
 
SB PROP ARL ARLP031
ARLP031 Propagation de KT7H
 
Solar flux was down an average of six points last week compared to
the previous week.  Conditions have been unstable, with the worst
days July 16 and 17, when the A index was 22 and 23.  Conditions
should quiet down after a few days, and A indices should drop below
ten around the end of the month and stay stable until August 11.
Look for the next disturbed period around August 13.  Solar flux
will rise gradually, peaking around 90 from August 4 through 6.
 
For the rest of the solar cycle, the latest projection shows the
solar flux reaching bottom around late Summer or Fall of 1996, with
an average value of 68.  The low point for the Sunspot Number is an
average of six from April through June of 1996.
 
Sunspot Numbers for July 13 through July 19 were 23, 20, 29, 24, 22,
19 and 33, with a mean of 24.3.  10.7 cm flux was 72.5, 74.4, 74.4,
73.5, 72.3, 72 and 70.5, with a mean of 72.8.
 
Path predictions for this week are from Norfolk, Virginia and Little
Rock, Arkansas to Svalbard (JW).
 
From Norfolk, the path looks good on 40 meters from 0030 to 0630z,
and on 30 meters from 2200 to 0700, and possibly as late as
1100.  20 meters should be open from 2200 to 0300 and again
around 0930 to 1200.
 
From Little Rock 40 meters should be open from 0300 to 0530z, and
30 meters from 0000 to 0830.  Check 20 meters from 1530 to
0100, although on some days it may open as early as 1400 and
close as late as 0530.  
NNNN
/EX