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Propagazione

Solar activity is expected to remain at low levels

Hannes Coetzee, ZS6BZP, reports that the solar activity is expected to remain at low levels. Currently there is only a single, small sunspot visible with no threat of solar flares. If you want to do your own frequency predictions, the expected effective sunspot number for the week will be around one. With the equinox here the 10 to 30 m …

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W4HM Daily HF Radio Propagation Forecast #2018-280

Greetings to my fellow hamateur radio and SWL radio enthusiasts around the world. Welcome to my “not for profit” daily W4HM Daily HF Radio Wave Propagation Forecast. It’s the only daily global HF radio wave propagation forecast produced on the planet. I’m a retired heliophysicist, terrestrial meteorologist/climatologist, physical oceanographer and one of the few on the planet with advanced education …

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W4HM Daily HF Radio Wave Propagation Forecast #2018-279

Greetings to my fellow hamateur radio and SWL radio enthusiasts around the world. Welcome to my “not for profit” daily W4HM Daily HF Radio Wave Propagation Forecast. It’s the only daily global HF radio wave propagation forecast produced on the planet. I’m a retired heliophysicist, terrestrial meteorologist/climatologist, physical oceanographer and one of the few on the planet with advanced education …

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The K7RA Solar Update

Sunspots finally returned on September 29, after over two weeks with none. Average daily sunspot numbers increased from 0 to 9.6, and average daily solar flux increased from 67.9 to 68.4 over the past week, September 27 through October 3. Average daily planetary A index declined from 10.9 to 7.7, while average mid-latitude A index changed from 7.9 to 6.1. …

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Propagation News – 7 October 2018

There are signs that ionospheric conditions are improving as we head into autumn. This isn’t unexpected; as the ionosphere cools there is a chemical shift towards more monatomic species that are easier to ionise. The 4U1UN New York, VE8AT Nunavut and ZS6DN Pretoria beacons on 14.100MHz were all audible at the same time on Wednesday, and we can expect transatlantic …

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Propagation outlook from Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2018 Oct 01 0253 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # http://www.swpc.noaa.gov/weekly.html # # Weekly Highlights and Forecasts # Highlights of Solar and Geomagnetic Activity 24 – 30 September 2018 Solar activity was at very low levels …

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Propagation News – 30 September 2018

At the risk of sounding very samey, the solar flux index remained at around 67-68 with zero sunspots this week, and just a few points off what we can expect at absolute solar minimum. As predicted, geomagnetic conditions were relatively poor at the beginning of the week, but did improve slightly later on, although the K-index remained at three at …

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Propagation de K7RA

SB PROP @ ARL $ARLP039 ARLP039 Propagation de K7RA ZCZC AP39 QST de W1AW Propagation Forecast Bulletin 39 ARLP039 From Tad Cook, K7RA Seattle, WA September 28, 2018 To all radio amateurs SB PROP ARL ARLP039 ARLP039 Propagation de K7RA The Sun remained spotless over the past week, and by September 27 the period with no sunspots was over two …

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Propagation outlook from Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2018 Sep 24 0321 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # http://www.swpc.noaa.gov/weekly.html # # Weekly Highlights and Forecasts # Highlights of Solar and Geomagnetic Activity 17 – 23 September 2018 Solar activity was at very low levels …

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Propagation News – 16 September 2018

Last week started with stable solar conditions, but very low activity. After 14 days without sunspots, two small, new spots turned up. Sunspot number 2721 existed for Sunday and Monday, then disappeared by Tuesday. Sunspot number 2722 popped up on Wednesday and Thursday, and was gone by Friday. Neither of these spots has disappeared altogether. They can hide below the …

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The K7RA Solar Update

We observed a return of sunspot activity during the past reporting week (September 6-12), with spots on four days, but not consecutive. Sunspots were visible on September 8-9 and 11-12. Average daily sunspot numbers increased to 7.6, compared to zero over the previous seven days. Average daily solar flux increased from 67.8 to 68.6, and planetary A index doubled from …

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Propagation outlook from Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2018 Sep 10 0413 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # http://www.swpc.noaa.gov/weekly.html # # Weekly Highlights and Forecasts # Highlights of Solar and Geomagnetic Activity 03 – 09 September 2018 Solar activity was at very low levels …

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