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Propagazione

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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The K7RA Solar Update

ARRL 04/10/2020 After five days of new Cycle 25 sunspot activity, sunspots vanished. Average daily sunspot number rose from 3.6 last week to 5.1 this time. The average daily sunspot number over the days they were visible, March 31 through April 4, was 12.2, but these observations straddled two reporting weeks. Average daily solar flux rose from 69.4 to 70.2. …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2020 Apr 06 1059 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 30 March – 05 April 2020 Solar activity was very low throughout …

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Propagation News – 5 April 2020

RSGB April 3, 2020 The high speed stream of solar particles from a coronal hole on the Sun last week wasn’t moving as fast as we initially thought. As a result, its impact on Earth, and the subsequent rise in the Kp index to four, happened in the early hours of Tuesday morning and not the weekend as we predicted. …

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The K7RA Solar Update

ARRL 04/03/2020 A new sunspot appeared on the last day in March and the first days of April, with daily sunspot numbers of 12, 13 and 12. Total sunspot area increased on each day from 10 to 20 to 30 millionths of a solar hemisphere. Fortunately, this was a Cycle 25 spot, according to the magnetic signature. Prior to this …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2020 Mar 30 0104 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 23 – 29 March 2020 Solar activity was very low throughout the …

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Propagation News – 29 March 2020

RSGB March 27, 2020 With the solar flux index remaining at 70-71 all week, conditions were pretty predictable. The Kp index rose to two or three at times, but on the whole geomagnetic conditions were stable. There was a large coronal mass ejection off the Sun on 20 March, but it wasn’t Earth-directed and didn’t affect us. It is at …

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The K7RA Solar Update

ARRL 03/27/2020 We saw another week with no sunspots, which were last observed just briefly over two weeks ago on two days, March 8-9. Spaceweather.com reports that so far in 2020, the percentage of days that have no sunspots is the same as all of 2019, when it was 77%. Last week we saw the spring equinox, always a good …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2020 Mar 23 0128 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 16 – 22 March 2020 Solar activity was very low. The visible …

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Propagation News – 22 March 2020

RSGB March 20, 2020 Last week saw a continuation of the zero sunspot regime we’ve been seeing for the past few months. The solar flux index remained in the range 70-72, with settled geomagnetic conditions and with the Kp index remaining in the range of one to two. Thursday the 19th was the exception, when the Kp index rose to …

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The K7RA Solar Update

On Wednesday, Spaceweather.com reported a new emerging Cycle 25 sunspot in the sun’s Northern Hemisphere, but it was not yet numbered. By the next day (yesterday) it had already faded away into nothingness. In last week’s bulletin we reported sunspots on just two days, March 8 and 9. Average daily sunspot number over this reporting week (March 12-18) declined to …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2020 Mar 16 0057 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 09 – 15 March 2020 Solar activity was very low. Region 2758 …

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