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Propagazione

Propagation News – 24 May 2020

RSGB May 22, 2020 Last week was dominated by extensive sporadic E openings that made 10 metres sound like 20 metres on a good day. The openings were steady and stable, with lots of stations around Europe being very workable. These openings extended to multi-hop as well, with Chris, VO1CH being heard on 10m FT8 at 1240UTC on Monday, the …

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The K7RA Solar Update

ARRL 05/22/2020 Still no sunspots to report. Spaceweather.com reported on May 20 that the current stretch of days with no sunspots has now reached 18. And with that the 2020 percentage of days with no sunspots has risen to 77%, equal to 2019. Until May 15 that statistic stood at 76%. Average daily solar flux for the week rose to …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2020 May 18 0322 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 11 – 17 May 2020 Solar activity was very low. The solar …

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Propagation News – 17 May 2020

RSGB May 15, 2020 We had another week dominated by sporadic E openings. While the Sun remained quiet with zero sunspots, sporadic E proved to be the major mode of propagation. It offered both single and multi-hop openings, with 10m being open to Spain, Portugal and beyond on most days. Likely multi-hop paths have seen openings to Chad, Mauritania, St …

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The K7RA Solar Update

ARRL 05/15/2020 No sunspots appeared last week. The previous seven days had only one big sunspot group on one day, with a sunspot number of 35. Over the seven-day period this averaged out to a sunspot number of 5, so average daily sunspot numbers declined from 5 to 0 this week. Average daily solar flux also declined, by one point …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2020 May 11 0302 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 04 – 10 May 2020 Solar activity was very low. Regions 2760 …

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Propagation News – 10 May 2020

RSGB May 7, 2020 It was a case of more of the same HF-wise last week. Zero sunspots and no geomagnetic disturbances meant that conditions were average for this point in late spring. The good news is that the sporadic E season has now officially started, and it is living up to its name. That is, it is sporadic! Either …

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The K7RA Solar Update

ARRL 05/08/2020 We haven’t seen a sunspot since Thursday, April 30 when the daily sunspot number was 35. This is a relatively high sunspot number based on recent activity, although not historically. In fact, the daily sunspot number has not been as high since March 21, 2019 when it was 49, and prior to that we need to look back …

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Propagation outlook from SWPC, Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2020 May 04 0250 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 27 April – 03 May 2020 Solar activity was very low throughout …

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Propagation outlook from SWPC, Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2020 Apr 27 0114 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 20 – 26 April 2020 Solar activity was very low throughout the …

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Propagation News – 26 April 2020

RSGB April 24, 2020 Last week showed how difficult it can be to prepare HF propagation predictions. We said that we expected the Sun to remain settled throughout the week. But on Wednesday, the 15th, there was a stealthy, slow-moving coronal mass ejection off the Sun that barely appeared in the SOHO spacecraft imagery. However, this CME was Earth-directed and …

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The K7RA Solar Update

ARRL 04/24/2020 The last day with a visible sunspot was April 4. Over the past reporting week, April 16-22, average daily solar flux was 69, down a half point from the previous week, when the average was 69.5. Average daily planetary A index was 7.3 while mid-latitude A index was 7. This was up from 6.1 and 5, mainly due …

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