martedì 26 Ottobre 2021
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Propagazione

Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2021 Sep 27 0235 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 September 2021 Solar activity was at very low to …

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Propagation News – 26 September 2021

This week saw the Sun more active with up to five sunspot regions in place. Two of the regions are quite large, pushing the solar flux index up to 89 on Thursday with a sunspot number of 76. That should be enough to get the ionosphere up and running and we are also seeing early Autumnal HF propagation starting to …

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The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: Last week, we reported a big increase in activity with the daily sunspot number reaching 124, but by the end of that week all sunspots had disappeared. The sun was blank for several days, but sunspots returned on September 19. Average daily sunspot numbers this week were 28.7, which was below the 58.3 average reported …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2021 Sep 20 0042 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 September 2021 Solar activity reached low levels. Region 2871 …

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Propagation News – 19 September 2021

After last week’s very active Sun, we have had a quieter week with little solar activity. As of Thursday, there were zero sunspots and the solar flux index had declined to 75, pretty much as predicted. The upside is that the Sun has been quiet geomagnetically with a maximum Kp index of three over the past week. This means the …

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The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: Sunspot numbers started strong at 124 this reporting week, September 9-15, but ended at zero. Average daily sunspot numbers went from 64.6 to 58.3. Average daily solar flux declined from 92.9 to 87.4. Geomagnetic indicators remained moderate, with last week’s average daily planetary A index unchanged at 7, and average daily middle latitude A index …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2021 Sep 13 0136 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 September 2021 Solar activity was at low levels with …

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Propagation News – 12 September 2021

What a difference a week makes! Last week we were looking at a virtually spotless Sun and we said that NOAA predicted the SFI would decline into the low 80s. But this week we have had an explosion of sunspot activity. As a result, the SFI has gone up to 100 with a sunspot number of 87. Just to recap, …

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The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: Sunspot activity increased dramatically this week. Over the course of the reporting week, sunspot numbers peaked at 87 on Wednesday, September 8; the day before, solar flux peaked at 101.2. The average daily sunspot numbers rose by 14, to 64.6, while the average daily solar flux increased from 88 to 92.9. New sunspots appeared on …

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August Geomagnetic Indices

GEOMAGNETIC INDICES – Compiled by: Phil Bytheway DXM.EiC@gmail.com Geomagnetic Summary August 01 2021 through August 31 2021 Tabulated from WWV on-line status daily (K @ 0000 UTC): ftp://ftp.swpc.noaa.gov/pub/forecasts/wwv/ Flux A K Space Wx 1 75 4 1 no storms 2 75 17 4 minor, G1 3 76 10 2 no storms 4 74 4 0 no storms 5 74 2 …

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Propagation outlook from SWPC

:Product: Weekly Highlights and Forecasts :Issued: 2021 Sep 06 0143 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 August – 05 September 2021 Solar activity was at low levels. …

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Propagation News – 5 September 2021

Well, NOAA got the solar flux index prediction wrong last week. The SFI actually ended up higher than the prediction, thanks to active region 2860, which grew as the week went on. NOAA also issued a G1, or Minor, and G2, or Moderate, geomagnetic storm watch for the 1st and 2nd of September, just days after two CMEs occurred on …

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