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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2020 Aug 24 0151 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 17 – 23 August 2020 Solar activity was very low for the …

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Propagation News – 23 August 2020

Sunspot region 2772 was rotating off the Sun’s limb at the end of the week. As a result, the solar flux index declined from 74 down to 71 as the Sun’s surface cleared. There was some activity though. A solar storm cloud was hurled into space on 16 August by a slow-motion solar flare in the Sun’s southern hemisphere. The …

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The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: Sunspots disappeared on 4 days over the past week, but then returned. The average daily sunspot number declined from 14.3 to 5.4, while average daily solar flux went from 73.8 to 71. Geomagnetic indicators remain quiet. The average daily planetary A index increased from 3.7 to 4.4. Predicted solar flux is 70 on August 21 …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2020 Aug 17 0158 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 10 – 16 August 2020 Solar activity was at very low levels …

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The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: New Sunspot Cycle 25 continues to make a strong showing. Sunspots have appeared on every day for more than 3 weeks. Average daily sunspot numbers for the week slipped a bit from 19.6 to 14.3 this week, but average daily solar flux increased from 72.8 to 73.8. Geomagnetic indicators remain quiet. Both the average daily …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2020 Aug 10 0329 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 03 – 09 August 2020 Solar activity was at very low levels …

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Propagation News – 9 August 2020

The week started with a geomagnetic disturbance caused by a high-speed stream from a coronal hole, which moved past the Earth at a speed in excess of 500 kilometres per second. This was not predicted by NOAA, but it was from a long coronal hole limb that stretched towards the solar equator. It pushed the Kp index to four in …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2020 Aug 03 0354 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 July – 02 August 2020 Solar activity was very low throughout …

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Propagation News – 2 August 2020

The Sun showed signs of coming back to life this week with not one, but two, sunspot groups. The sunspot number climbed to 22, representing two spots in two separate groups, and the solar flux index rose to 73. This wasn’t really enough to make much of a difference to HF propagation though, but it is a step in the …

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The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: Finally, sunspots have returned! Two sunspots now are visible, both from new Solar Cycle 25. The daily sunspot number was 11 for July 21-27, rising to 22 for July 28-30. Recently, we have noticed an improvement in propagation due to seasonal sporadic-E activity. Average daily sunspot numbers rose from 3.1 to 14.1 this week, and …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2020 Jul 27 0132 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 July 2020 Solar activity was very low throughout the …

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The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: Another Cycle 25 sunspot (AR2767) appeared this week, with a minimum non-zero sunspot number of 11 on July 21 – 23. This puts the average daily sunspot number for the July 16 – 22 reporting week at 3.1, up from 1.7 over the previous 7 days. Geomagnetic indicators remain very quiet, with average daily planetary …

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