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Propagazione

Propagation outlook from Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2019 Jul 29 0117 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # https://www.swpc.noaa.gov/content/subscription-services # # Weekly Highlights and Forecasts # Highlights of Solar and Geomagnetic Activity 22 – 28 July 2019 Solar activity was at very low levels …

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Propagation News – 28 July 2019

Last week HF was once again dominated by sporadic E openings. On Wednesday FT8 contacts were being made across Europe on 28MHz, from Finland in the north to Spain in the south. It was a similar story on Thursday with S9 signals from the Balearic Islands to Norway. As we head towards August it is best to make the most …

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Propagation outlook from Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2019 Jul 22 0209 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # https://www.swpc.noaa.gov/content/subscription-services # # Weekly Highlights and Forecasts # Highlights of Solar and Geomagnetic Activity 15 – 21 July 2019 Solar activity was very low on 15-21 …

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The K7RA Solar Update

Very low solar activity continues. Over the past week, average daily solar flux changed insignificantly from 67.1 to 67. There were no sunspots. Average daily planetary A index changed from 8.4 to 5.9, while mid-latitude A index changed from 8.6 to 6.7. Conditions remain quiet. Predicted solar flux is 68 on July 19-26, and 67 on July 27 to September …

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Propagation News – 21 July 2019

There is very little to say about HF propagation last week. Conditions were relatively settled, thanks to a respite from solar coronal hole activity, but the HF summer doldrums are still taking their toll. The summer ionosphere is composed mainly of diatomic gases rather than monatomic, and these are harder to ionise. This means maximum useable frequencies are lower during …

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Propagation outlook from Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2019 Jul 15 0223 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # https://www.swpc.noaa.gov/content/subscription-services # # Weekly Highlights and Forecasts # Highlights of Solar and Geomagnetic Activity 08 – 14 July 2019 Solar activity was at very low levels …

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Propagation News – 14 July 2019

Last week saw poor geomagnetic conditions on Tuesday and Wednesday, with the Kp index hitting five. This was due to a weak coronal mass ejection followed by the onset of a solar wind stream from a coronal hole. A solar wind speed above 650km/s, coupled with a strongly south-pointing Bz field, led to geomagnetic unrest at higher latitudes. The net …

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The K7RA Solar Update

Like June 24-27, July 7 had a new spot from cycle 25, according to the magnetic signature. This week’s brief appearance was last Sunday with a daily sunspot number of 12. Average daily solar flux declined marginally from 67.5 to 67.1. Predicted solar flux for the next 45 days is 67 on July 12 through August 25. That’s right, 67 …

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W4HM Daily MF-HF Radio Wave Propagation Forecast

Sorry for no daily MF/MF radio wave propagation forecast since June 23, 2019 due to personal illness. I appear to be headed for a second back surgery later this month. It is complex and takes up to one year to recover from it.   I’m a day late and a dollar short but the 3rd reverse polarity high latitude sunspot …

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Propagation outlook from Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2019 Jul 08 0205 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # https://www.swpc.noaa.gov/content/subscription-services # # Weekly Highlights and Forecasts # Highlights of Solar and Geomagnetic Activity 01 – 07 July 2019 Solar activity was at very low levels …

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The K7RA Solar Update

Tad Cook, K7RA, in Seattle, reports: Solar activity remains very low. Over the past 2 weeks, only 4 days had visible sunspots, so the average daily sunspot number went from 6.7 in last week’s report to 1.6 this week. Average daily solar flux remained the same, moving only from 67.4 to 67.5. Geomagnetic activity was also flat, with average daily …

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Propagation News – 7 July 2019

Good news—this week saw two sunspots appear from the upcoming solar cycle 25. We know this due to their magnetic polarity and locations close to the solar equator. Unfortunately, the sunspots didn’t last very long before vanishing. But it is a start. Earlier this year, an international panel of experts predicted that solar minimum would deepen in 2019 and begin …

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