[RSM] RSM Digest, Vol 54, Issue 13
Gord Kosmenko
gord.kosmenko at gmail.com
Wed Mar 17 21:13:10 EDT 2021
Absolutely right on! HF propagation from Mid-West Canada
has it’s own flavour. And only us who live here and operate
contests and chase DX from here truly understand this realism.
Nobody is racing to build competitive stations to participate in
DX contests in Mid-West Canadian before all the good land
is bought up!
73, Gord VE6SV
> On Mar 16, 2021, at 6:50 PM, David Latour <ve4dla at gmail.com> wrote:
>
> Propagation Report
> This is a lot of things to think about, and it may be somewhat valid in
> mid-Atlantic states, but it seems to bear little relation to the aether
> over the Prairies.
>
> 73 David
>
> On Tue, Mar 16, 2021 at 11:01 AM <rsm-request at contesting.com> wrote:
>
>> Send RSM mailing list submissions to
>> rsm at contesting.com
>>
>> To subscribe or unsubscribe via the World Wide Web, visit
>> http://lists.contesting.com/mailman/listinfo/rsm
>> or, via email, send a message with subject or body 'help' to
>> rsm-request at contesting.com
>>
>> You can reach the person managing the list at
>> rsm-owner at contesting.com
>>
>> When replying, please edit your Subject line so it is more specific
>> than "Re: Contents of RSM digest..."
>>
>>
>> Today's Topics:
>>
>> 1. W3LPL prop forecast 2021 03 16 (Art Boyars)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Tue, 16 Mar 2021 08:29:51 -0400
>> From: Art Boyars <artboyars at gmail.com>
>> To: rsm <rsm at contesting.com>
>> Subject: [RSM] W3LPL prop forecast 2021 03 16
>> Message-ID:
>> <CAJFNq0GPRbzv2WryNgtGUrKKEFad-PNn0e6+8Vns2T0H9=
>> o2Og at mail.gmail.com>
>> Content-Type: text/plain; charset="UTF-8"
>>
>> From: donovanf at erols.com
>> To: pvrc reflector <pvrc at mailman.qth.net>
>> Cc:
>> Bcc:
>> Date: Tue, 16 Mar 2021 01:47:44 -0400 (EDT)
>> Subject: [PVRC] Propagation is likely to be normal through Wednesday
>>
>> Long distance propagation forecast for Tuesday and Wednesday, March 16-17
>>
>> My propagation forecast derived from today's NOAA/SWPC web
>>
>> pages is published five days a week (M-F) in the Daily DX.
>>
>>
>>
>> Low and mid-latitude propagation is likely to be normal through at
>>
>> least Wednesday. Auroral zone and polar propagation is likely to be
>>
>> mostly normal on Tuesday, then normal on Wednesday.
>>
>>
>>
>> Click *here* <https://services.swpc.noaa.gov/images/planetary-k-index.gif>
>> for today?s
>> latest planetary Kp Index, updated every three hours.
>>
>> Click *here* <http://www.hamqsl.com/solar.html> for N0NBH?s current HF
>> Band
>> Conditions, updated regularly.
>>
>>
>>
>> The solar flux index (SFI) is likely to remain at about 75 though at
>>
>> least Wednesday. There is only one tiny sunspot on the visible disk
>>
>> having no significant effect on HF propagation.
>>
>>
>>
>> We are in the March-April geomagnetic storm season when the earth
>>
>> passes through the part of the interplanetary magnetic field (IMF)
>>
>> with more frequent, longer duration southward oriented magnetic
>>
>> field. Approximately twice as many brief minor and moderate
>>
>> geomagnetic storms occur during March and April compared to the
>>
>> quieter IMF during June and July. Brief minor to moderate
>>
>> geomagnetic storms may be triggered with little warning when the
>>
>> IMF rotates to a southward orientation and persists for several hours
>>
>> *coincident with* the effects of earth directed coronal hole high speed
>>
>> stream enhancements in the solar wind.
>>
>>
>>
>> 160 through 17 meter low and mid latitude propagation is likely to be
>>
>> normal through Wednesday.
>>
>>
>>
>> 160 and 80 meter short path propagation to south Asia is likely to be
>>
>> normal at 0200Z Wednesday. 80 meter short path propagation from
>>
>> North America to east Asia is likely to be mostly normal on Tuesday
>>
>> then normal on Wednesday. 80, 40 and 30 meter long path propagation
>>
>> from North America to southeast Asia at about 2330Z is likely to be
>>
>> normal through Wednesday.
>>
>>
>>
>> 30 meter auroral zone and polar propagation is likely to be mostly
>>
>> normal on Tuesday then normal on Wednesday. 30 meter propagation
>>
>> is always significantly degraded within a few hours of local noon
>>
>> because of E-region blanketing of long distance F2 propagation.
>>
>> 30 meter propagation is unreliable during most of the night in the
>>
>> northern hemisphere because of insufficient residual night time
>>
>> F region electron density due to only one tiny sunspot on the visible
>>
>> disk.
>>
>>
>>
>> 20 meter daytime auroral zone and polar propagation is likely to be
>>
>> mostly normal on Tuesday then normal on Wednesday. Night time
>>
>> 20 meter propagation in the northern hemisphere continues to be
>>
>> very unreliable because of insufficient residual F region electron
>>
>> density due to only one tiny sunspot on the visible disk.
>>
>>
>>
>> 17 and 15 meter daytime mid-latitude propagation in the northern
>>
>> hemisphere continues to be shorter in duration because of insufficient
>>
>> F2 region electron density due to only one tiny sunspot on the visible
>>
>> disk. 12 and 10 meter daytime propagation is likely to be unreliable
>>
>> and mostly limited to propagation from North America to Southern
>>
>> Africa, South Atlantic, South America and South Pacific regions.
>>
>>
>>
>> Active geomagnetic conditions *caused by coronal hole high speed*
>>
>> *streams* are likely to remain mostly brief, minor and relatively
>>
>> infrequent through at least late 2021. Brief minor to moderate
>>
>> geomagnetic storms may be triggered when the IMF persists in a
>>
>> southward orientation (-Bz) with enhanced field strength for several
>>
>> hours *coincident with* the effects of earth directed coronal hole
>>
>> high speed stream enhancements in the solar wind.
>>
>>
>>
>> IMF field strength, solar wind speed near earth, coronal hole high speed
>>
>> stream effects and geomagnetic activity are likely to decline to quiescent
>>
>> levels through Wednesday. Earth directed CMEs or solar flares strong
>>
>> enough to affect HF propagation are not likely through Wednesday.
>>
>>
>>
>> Northern hemisphere daylength is 153 minutes longer than it was on
>>
>> December 21st. Sunset is now 91 minutes later than it was on
>>
>> December 9th. Daylength is increasing by two minutes per day which
>>
>> is steadily reducing the duration of common darkness between distant
>>
>> locations in the northern hemisphere.
>>
>>
>>
>> Click *here* <https://www.spaceweather.gc.ca/solarflux/sx-4-en.php> for
>> today?s
>> Penticton 10.7 cm solar flux index updated at 1800Z, 2000Z and 2200Z daily.
>>
>> Click *here*
>> <
>> https://spaceweather.gfz-potsdam.de/fileadmin/ruggero/Kp_forecast/forecast_figures/KP_FORECAST_CURRENT.png
>>>
>> for today?s
>> three-day GFZ Planetary K Index forecast updated every three hours.
>>
>> Click *here* <http://sidc.oma.be/products/meu/> for today's SIDC Daily
>> Bulletin on Solar and Geomagnetic Activity updated at 1230Z daily.
>>
>> Click *here* <https://www.swpc.noaa.gov/products/forecast-discussion>
>> for today's
>> SWPC Solar Activity Forecast Discussion updated at 0030Z and 1230Z daily.
>>
>> Click *here* <https://www.sws.bom.gov.au/Space_Weather/1/1> for today's
>> Australian Space Forecast Centre Summary and Forecast updated at 2330Z
>> daily.
>>
>>
>>
>> Perhaps the most useful HF propagation pages for DXers can be found at:
>>
>> dx.qsl.net/propagation and www.solarham.net and hamqsl.com/solar.html
>> <http://www.hamqsl.com/solar.html>
>>
>>
>> ------------------------------
>>
>> Subject: Digest Footer
>>
>> _______________________________________________
>> RSM mailing list
>> RSM at contesting.com
>> http://lists.contesting.com/mailman/listinfo/rsm
>>
>>
>> ------------------------------
>>
>> End of RSM Digest, Vol 54, Issue 13
>> ***********************************
>>
>
>
> --
> 73 de David VE4DL
> _______________________________________________
> RSM mailing list
> RSM at contesting.com
> http://lists.contesting.com/mailman/listinfo/rsm
More information about the RSM
mailing list