sabato 4 Luglio 2020
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Propagazione

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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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2020 Apr 20 0123 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 13 – 19 April 2020 Solar activity was very low throughout the …

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The K7RA Solar Update

ARRL 04/17/2020 Sunspots are gone again. We are at the bottom of the solar cycle, so conditions should only get better. There is an increase in on-air activity due to the large number of people staying at home because of Covid-19, and this week we seem to be overwhelmed with reports of sporadic E openings. The last observed sunspot disappeared …

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Propagation News 19 April 2020

RSGB April 17, 2020 Last week we said that we expected the Kp index to rise over the weekend due to incoming solar particles from an Earth-facing coronal hole. But we did warn that it was impossible to tell how severe it might be. In the end it didn’t amount to much, as although the stream was travelling at up …

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Propagation outlook from SWPC, Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2020 Apr 13 0138 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 06 – 12 April 2020 Solar activity was very low through the …

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Propagation News – 12 April 2020

RSGB April 9, 2020 Sunspot group 2759, as reported last week, never really amounted to much and vanished before it got to the solar disk’s edge. The matter from a solar coronal hole did hit the Earth last weekend as we predicted, sending the Kp index to four in the early hours of Saturday morning. Even though we don’t have …

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