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Posting-Version: version B 2.10.1 6/24/83; site mgweed.UUCP
Path: utzoo!watmath!clyde!cbosgd!ihnp4!mgnetp!mgweed!rjr
From: rjr@mgweed.UUCP (Bob Roehrig)
Newsgroups: net.ham-radio
Subject: arrl propagation forecast bulletin nr 36
Message-ID: <20342@mgweed.UUCP>
Date: Wed, 11-Sep-85 11:44:10 EDT
Article-I.D.: mgweed.20342
Posted: Wed Sep 11 11:44:10 1985
Date-Received: Thu, 12-Sep-85 11:02:52 EDT
Organization: AT&T Information Systems - Montgomery Illinois
Lines: 33


qst de k9eui
hr arrl propagation forecast bulletin nr 36  from arrl headquarters
newington ct  september 8, 1985
to all radio amateurs  bt

(((((accuracy not guaranteed due to poor conditions)))))

the almost total solar calm that (started) nearly a  month  ago
is  still  with  us.  the solar flux has been no higher than 72
since september 1, and it was down to 69 by the 8th.  the  flux
was  even  lower  4  weeks ago, so readings in the high 60s are
expected through about september 13.  the sun is moving to  its
most   favorable   position  for  the  northern  hemisphere  so
propagation will tend to be good on 14 mhz and lower bands much
of  the  time.   a  small  flux rise will bring 21 mhz to life,
especially when the wwv k index is 2 or lower. even 24  and  28
mhz have been good on the ? days,  but thus far they are usable
only on transequatorial or other low  latitude  circuits.  flux
values  in  the middle 70s or higher will improve conditions on
24 and 28 mhz quite markedly when the k index is  2  or  lower.
the  k index trend is important so a new value is given every 3
hours. the a index  is  a  24  hour  figure,  more  useful  for
statistical  purposes.   the  k index values are expected to be
higher during the middle of september but this will tend to  be
offset  by  the  improving  sun  position.  the qst propagation
charts should be more (accurate) this fall. they are now  based
on solar flux values in the low 70s, more in line with what can
be expected in the coming weeks.

american sunspot numbers for august 29 through september 5 were
between 0 and (3?) with a mean of (.4?).  ar