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Propagazione

The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: Solar activity was lower this week, with the average daily sunspot number declining from 34.9 last week to 13.9 this week. This average was affected by the single day with no sunspots, Saturday, June 12. Average daily solar flux dropped from 77.7 to 75.2. The Penticton observatory in British Columbia (the source for the 10.7-centimeter …

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Geomagnetic Indices, May 2021

GEOMAGNETIC INDICES – Compiled by: Phil Bytheway DXM.EiC@gmail.com Geomagnetic Summary May 01 2021 through May 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 72 5 2 no storms 2 72 10 2 no storms 3 72 5 1 no storms 4 70 4 1 no storms 5 70 2 …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2021 Jun 14 0205 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 07 – 13 June 2021 Solar activity was at low levels due …

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Propagation News – 13 June 2021

The predicted geomagnetic disturbance we spoke about last week didn’t amount to much. The Kp index rose to four on Monday evening, but the disturbance was short-lived and it was back to one later on Tuesday. Region 2829 was the only sunspot group visible on the Sun later in the week. This pushed the solar flux index to 80, but …

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The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: Sunspot activity has shown steady but modest increases over the past 3 weeks, with average daily sunspot weekly averages rising from 24.9 to 28 to 34.9. Oddly, average daily solar flux for the same 3 weeks was 77.8, 77.8, and 77.7, remarkably unchanged week after week. Average daily planetary A index went from 6.1 last …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2021 Jun 07 0121 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 31 May – 06 June 2021 Solar activity was at very low …

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Propagation News – 6 June 2021

The Sun was pretty quiet over the last week, with few sunspots and a solar flux index in the mid-70s. From a peak of 82 on Sunday, the SFI declined to 75 on Thursday when there were just two small sunspot groups visible, regions 2827 and 2929. As predicted, geomagnetic conditions have been mostly settled, with a maximum Kp index …

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The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: Solar Cycle 25 activity continues this week, with no spotless days since May 6. The average daily sunspot number rose modestly this week from 24.9 to 28 while the average daily solar flux held steady at 77.8. Predicted solar flux over the next month is 75 on June 4 – 6; 72 on June 7 …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2021 May 31 0313 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 24 – 30 May 2021 Solar activity was at very low levels …

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Propagation News – 30 May 2021

“May you live in interesting times.” So says the ancient Chinese curse, and last week was interesting, to say the least. Sunspot region 2824 was joined by region 2826, pushing the solar flux index to 88. At the same time, a coronal mass ejection from region 2824 threatened to push the Kp index high on the 25th. The reality was …

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The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: The 10.7-centimeter solar flux rose this week, and on Wednesday May 26 it reached 88, the highest it’s been since December 7, 2020, when it was 89.5. The next day at 2300 UTC, the flux value was 94.2. The official flux value is always the local noon reading at Canada’s Dominion Radio Astrophysical Research Facility …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2021 May 24 0337 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 May 2021 Solar activity ranged from very low to …

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