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From: rjr@mgweed.UUCP (Bob Roehrig)
Newsgroups: net.ham-radio
Subject: arrl propagation forecast bulletin nr 24
Message-ID: <9863@mgweed.UUCP>
Date: Tue, 12-Jun-84 08:50:58 EDT
Article-I.D.: mgweed.9863
Posted: Tue Jun 12 08:50:58 1984
Date-Received: Wed, 13-Jun-84 00:21:10 EDT
Organization: AT&T Consumer Products - Montgomery Illinois
Lines: 31


qst de k9eui
hr  propagation  bulletin  nr  24    from   arrl   headquarters
newington ct
june 11 1984   to all radio amateurs  bt

from early january through late may, the sun  was  more  active
than  would  have been expected so late in the solar cycle, but
it lost most of its spots in the last  two  weeks.   the  solar
flux  was 66 points lower on may 27 than on april 29, one solar
rotation earlier, and down to 90 on  june  10.   this  was  its
lowest level since january 10.

the best part of this picture is  that  the  effekts  of  lower
solar  flux  and  lower  sunspot  numbers  are  minimal at this
season.  if the sun should recover somewhat in the  autumn,  it
will do more for northern hemisphere dx then than now.  more on
this prospect will be given in late summer bulletins.

a portion of the sun with that flux peak of 140 on may 21  will
come  into  view  about  june 14.  for the week, it is expected
that hf propagation will be fair to good june  11  to  13,  but
recurrent geomagnetic disturbances are due june 16 through 21.

sporadic  e  layer  ionization  increases  gradually  in  june,
helping to keep things happening on 21, 28, 50 and possibly 144
mhz almost regardless of flux or sunspot numbers.

american sunspot numbers for may 31 through june 6 were between
24 and 48 with a mean of 37.3. ar