CQWW DX Contest Propagation Update – Focus on the Low Bands

CQ Propagation Editor Tomas Hood, NW7US, updates us on expected propagation conditions during both the SSB and CW weekends of the 2017 CQ World Wide DX Contest…

CQ WW DX SSB Contest conditions look poor to fair, and somewhat unstable

Poor to Fair Conditions Expected

Here is an updated forecast made a week in advance for the general propagation conditions expected during the 2017 CQ World Wide DX SSB Contest weekend of October 28-29.  Based on the 27-day recurrence tendencies of solar and geomagnetic conditions, we predict poor to fair conditions on both days. Expect the contest to start weak, but to improve slightly asSunday dawns.

Daily 10.7cm solar flux levels are expected to be around 85 during the contest weekend, so the higher HF bands will be barely productive, with our workhorse remaining 20 meters.  The geomagnetic Planetary A-index is expected to be variable between 10 and 15. The lower frequencies will be more productive, and will allow for weak signals to be heard on higherfrequencies when an opening exists on some given path.

Remember that at any time during the contest, if there are sunspots present, a flare may occur.  When flares erupt, it could cause a radio blackout on the Sun-facing side of the Earth. These last between ten to sixty minutes, depending on the strength and location of the flare.  We don’t expect much solar flare activity. However, as we witnessed recently, a sunspot region may still suddenly develop, and unleash a flare or two (or more).

We’re still a month-plus away from the CQWW CW Weekend, but here’s how things are looking as of now…

CQ WW DX CW Contest conditions look fair, and stable

Fair Conditions Expected

Here is an updated forecast in late October for the general propagation conditions expected during the 2017 CQ World Wide DX CW Contest weekend of November 25-26.  Based on the 27-day recurrence tendencies of solar and geomagnetic conditions, we predict fair conditions on both days. Expect the contest to start fair, but to improve slightly on Sunday.

As with the SSB weekend, daily 10.7cm solar flux levels are expected to be around 85 during the contest weekend, so the higher HF bands will be barely productive, with our workhorse remaining 20 and 40 meters.  The geomagnetic Planetary A-index is expected to be between 5 and 8; stable. The lower frequencies will be more productive, and will allow for weak signals to be heard on higher frequencies when an opening exists on some given path.

Remember that at any time during the contest, if there are sunspots present, a flare may occur.  When flares erupt, it could cause a radio blackout on the Sun-facing side of the Earth. These last between ten to sixty minutes, depending on the strength and location of the flare.

Source: cqnewsroom.blogspot.com.br

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