>From the western USA, on 10 meters, in the 20Z-23Z time, the path to
Scandinavia is well understood. Single hop F layer from western USA to
northern Quebec, then auroral Es to Scandinavia.
73,
Steve, N2IC
On Mon, Jan 31, 2022 at 6:02 AM Timo Klimoff <timo.klimoff@dnainternet.net>
wrote:
> Nowadays in Scandinavia we are able to monitor 10/15m FT8 frequencies to
> see
> if the path is open. So having your WSJT-X on is handy.
> Path also varies: it is more frequently the northern thing - SM2/OH8/OH9
> the
> path is usually more often open and in the south OH1/OH2 openings are often
> shorter. Usually Baltic countries are already too much in the south.
> On stateside end path also varies: the most common is probably West Coast
> propagation but sometimes we are able to work only EastCoast! When
> propagation during the sunspot max. is sweet, we are able work both NA and
> JA over the pole at 21-23Z, even on 10m!
> Mechanism is unknown to me but clearly aurora usually "gives a boost" to
> this path.
>
> 73 Timo OH1NOA OH1NA (one of OH1F gang)
>
> > -----Original Message-----
> > From: CQ-Contest <cq-contest-
> > bounces+timo.klimoff=dnainternet.net@contesting.com> On Behalf Of K9MA
> > Sent: Monday, January 31, 2022 4:03 AM
> > To: cq-contest@contesting.com
> > Subject: Re: [CQ-Contest] Scandanvian propagation question
> >
> > I don't know the exact propagation mechanism, but this path from far
> > northern EU to the northern US is very often open. We may experience it
> > more often here in the north-central US, because our geomagnetic latitude
> is
> > close to that of southern Scandinavia, and at least 10 degrees higher
> than
> our
> > geographic latitude. The openings happen in the winter, long after the
> band
> > has gone dead to the rest of EU. It even happens on 10 meters in high
> sunspot
> > years.
> >
> > I don't know how much further south it extends in NA. May Jukka can tell
> us.
> >
> > 73,
> > Scott K9MA
> >
> >
> >
> > On 1/30/2022 2:43 PM, Jukka Klemola wrote:
> > > John,
> > > You ask for wisdom "does anyone know of the propagation mechanism to
> > > explain this"
> > >
> > > Simple answer is, living here in Scandivnavia, been on the bands from
> > > 1982, all I can tell is the Queen Aurora shakes her skirt so every now
> > > and then there is some dust or glitter that opens up the path.
> > >
> > > It is 'rather typical' the path is there, but it is more typical the
> > > areas at each end are small.
> > > That is, the opening must be from an area to an area there are
> > > stations and then the stations must be on.
> > >
> > > Then the most difficult part:
> > > At least one of the stations must call CQ so the other has the rare
> > > opportunity to answer the CQing station.
> > >
> > > The enigma in this is how often there are stations calling CQ to a
> > > completely empty band?
> > > Well .. sometimes the rag-chewers reveal the opening.
> > >
> > > Against many possible odds, we do encounter these openings every now
> > and then.
> > >
> > > Typical Old Timer answer at local clubs here is that this propagation
> > > happens only during contests. This propagation does not exist outside
> > > countest hours.
> > >
> > > Reckon that is not the whole truth. There is more to it.
> > >
> > > We can analyze SFI, solar wind parameters, K or A figures ...
> > > Yeap. You guessed right.
> > >
> > >
> > > 73,
> > > Jukka OH6LI
> > >
> > >
> > > su 30. tammik. 2022 klo 22.28 John Geiger (af5cc2@gmail.com)
> kirjoitti:
> > >> Something I have noticed during the ARRL DX contest, and other winter
> > >> contests, as well as during casual DXing, maybe a LA/SM/OH contester
> > >> will have a better explanation for this:
> > >>
> > >> This past Friday I worked a SM3 on 15m FT8 at 5:15pm local time (2315
> > >> UTC), well past the time that the path to Europe on 15 had closed.
> > >> This isn't the first time I have had this occur. Over the past few
> > >> years I have witnessed this before, stations from LA/SM/OH coming
> > >> through on 15 and 17 meters mid to late afternoon, several hours
> > >> after the path to Europe had closed for that band. They haven't been
> > >> coming in the whole time since the disappearance of the rest of
> > >> Europe, it is like a new path opens up several hours later, but only
> > >> to these regions. These areas in Europe will have been in darkness
> > >> for several hours as well, dropping the MUF below 15 and
> > >> 17 meters, but there they are.
> > >>
> > >> This is a winter phenomena I am discussing. I am very familiar with
> > >> Europe coming in later at night on 15 and 17 during the summer
> > >> months, especially during higher sunspot numbers.
> > >>
> > >> So does anyone know of the propagation mechanism to explain this-why
> > >> this one part of Europe comes in several hours after the path to the
> > >> rest of Europe has closed-and when it is well into darkness at their
> > >> QTH? I am guessing it might have something to do with their location
> > >> in the Auroral Zone and some sort of Aurora to F2 hookup, but that is
> just a
> > guess.
> > >>
> > >> 73 John AF5CC
> > >> _______________________________________________
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> > >> CQ-Contest@contesting.com
> > >> http://lists.contesting.com/mailman/listinfo/cq-contest
> > > _______________________________________________
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> >
> >
> > --
> > Scott K9MA
> >
> > k9ma@sdellington.us
> > _______________________________________________
> > CQ-Contest mailing list
> > CQ-Contest@contesting.com
> > http://lists.contesting.com/mailman/listinfo/cq-contest
>
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