ARRL

ARRL Propagation Bulletin ARLP028 (1995)

SB PROP @ ARL $ARLP028
ARLP028 Propagation de KT7H
 
ZCZC AP96
QST de W1AW  
Propagation Forecast Bulletin 28  ARLP028
From Tad Cook, KT7H
Seattle, WA  June 30, 1995
To all radio amateurs 
 
SB PROP ARL ARLP028
ARLP028 Propagation de KT7H
 
Average solar flux was unchanged last week from the week previous,
and geomagnetic indices have been quiet, with K indices between
zero and two.  The most disturbed day last week was June 26, when
the A index reached 16 and the K index went briefly to four.
 
Geomagnetic conditions are expected to enter a very quiet period
for the next couple of weeks.  This should produce stable
conditions, although solar activity is low enough to depress
propagation at higher frequencies.  Look for a rising solar flux
which should peak at 90 around July 13 or 14.  The next period when
the K index rises above 3 should be around July 16.
 
With Summer here, expect some sporadic E skip propagation on 10, 12
and 15 meters over distances of 500 to 1000 miles.  20 meters
should be the best band overall, peaking after sunrise and again in
the late afternoon and early evening.
 
Sunspot Numbers for June 22 through 28 were 27, 34, 19, 17, 18, 13
and 13, with a mean of 20.1.  10.7 cm flux was 73.1, 71.9, 71.1,
70.8, 70.9, 72.3 and 74.5, with a mean of 72.1.
 
The path projections for this week are from Pittsburgh, PA,
Jefferson City, MO and Maui, HI to Tokelau (ZK3).
 
From Pittsburgh 80 meters looks good from 0600z to 1030z, and 40
meters from 0500 to 1130.  Check 30 meters from 0400 to 1230
and 20 meters from 0230 to 0800 and 1030 to 1330.  17 meters
should be open most days from 2130 to 0100, and on some days 15
meters around 0230.
 
From Jefferson City check 80 meters from 0530z to 1130z, 40 meters
from 0500 to 1230 and 30 meters from 0400 to 1330.  20 meters
looks promising around 0130 to 0700 and 1200 to 1330.  17
meters should be open most days around 2100 to 0530, and on some
days 15 meters may open around 0330 to 0430.
 
From Maui 80 meters looks quite strong from 0530z to 1630z and 40
meters from 0330 to 1830.  On some days 30 meters may be open
around the clock, but the best bets are around 0500 to 1430.  The
weakest period for 30 meters may be around local sunrise on Maui.
20 meters looks good from 1800 to 0900, 17 meters from 2000 to
0700 and 15 meters from 2200 to 0600.  12 meters looks best
around 0130 to 0530 and 10 meters from 0300 to 0430.
NNNN
/EX