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From: ad7i@houxp.UUCP
Newsgroups: net.ham-radio
Subject: Propagation Bulletin 46
Message-ID: <323@houxp.UUCP>
Date: Sun, 20-Nov-83 19:13:19 EST
Article-I.D.: houxp.323
Posted: Sun Nov 20 19:13:19 1983
Date-Received: Tue, 22-Nov-83 00:24:03 EST
Lines: 27


qst de ad7i
hr propagation forecast bulletin nr 46  from arrl headquarters
newington ct  november 14, 1983
to all radio amateurs bt

during early november the solar flux rose gradually, to 111 on the
7th.  it then turned downward, reaching a low of 92 on the 12th.  it
went up two points the next day, but visual observation of the sun
has not indicated that any major upturn is imminent.

frequent geomagnetic disturbances beginning the 8th, and still with
us as this bulletin was issued, are expected to clear by the 15th,
bringing generally good propagation on all dx frequencies november 16
and 17.  a longer stable period is expected about november 21.
higher solar activity and an unstable magnetic field will degrade
conditions during the 24th and for most of the balance of november.

the solar flux has been lower than at the same time in the previous
solar rotation since october 20.  this will be the expected condition
more often than not for the next three years or so, but there will be
exceptions, usually brief.  the 21 and 28 mhz bands have been very
good at times this month and they will be useful fairly often through
at least the next year.

american sunspot numbers for november 3 through 9 were between 42 and
94 with a mean of 62.9  ar