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Propagazione

Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2021 Mar 29 0157 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 22 – 28 March 2021 Solar activity was at very low levels …

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Propagation News – 28 March 2021

What a mixed week we had, with large geomagnetic storms interspersed with quiet periods. The first storm occurred last weekend, when the Kp index hit six on Saturday and then five on Sunday. This wasn’t unexpected and we did warn that it might happen in the last GB2RS broadcast. A second storm occurred when a weak shock passage was detected …

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The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: On March 21 and 22 two new sunspot groups, 2811 and 2812, appeared. Average daily sunspot number this week faded a bit from 19 to 17.9, but average daily solar flux went from 78.1 to 78.6. Neither change is significant. We haven’t seen a day with no sunspots since March 1, so that brings the …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2021 Mar 22 0107 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 15 – 21 March 2021 Solar activity was very low throughout the …

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Propagation News – 21 March 2021

We had a week of settled geomagnetic conditions, following a mixed weekend. The consensus on the Commonwealth Contest was that conditions were not too good, although plenty of amateurs managed to put VK in their logs, despite the Kp index hitting four during the event. The Sun remained fairly quiet, with a solar flux index of 81 on Saturday and …

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The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: Average daily sunspot numbers this week rose just a little, from 18.4 to 19, and average daily solar flux edged up from 78.9 to 78.1. Solar activity remains low. The vernal equinox, (the first day of spring in the northern hemisphere) occurs at 0937 UTC on Saturday, March 20. That’s when the southern and northern …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2021 Mar 15 0111 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 08 – 14 March 2021 Solar activity was very low on 08 …

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Propagation News – 14 March 2021

The bulk of last week saw settled geomagnetic conditions. Wednesday saw the Kp index at zero for much of the day, which is unusual. This was mainly due to a lack of disruptive coronal holes on the Sun’s surface, so the solar wind speed was mainly below 400 kilometres per second. The Sun was relatively spotless and at the time …

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The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: Although solar activity remains low, in recent days, as a sunspot rotates to the west off the visible solar disc a new one emerges in the east. Sunspot group 2807 recently moved over the sun’s western horizon, but on March 9 new sunspot group 2808 moved across the eastern horizon, and a newer group (2809) …

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Propagation outlook from SWPC Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2021 Mar 08 0146 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 01 – 07 March 2021 Solar activity was very low on 01 …

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Propagation News – 7 March 2021

We had another week of geomagnetic disturbances due to high-speed solar wind streams. Although the week started well, with a Kp index of zero to three on Sunday, it went rapidly downhill. Monday saw the Kp index hit six and Tuesday evening saw it hit five after the solar wind speed exceeded 600km per second. The strongly-negative Bz field of …

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The K7RA Solar Update

Tad Cook, K7RA, Seattle, reports: We saw one day during the February 25 – March 3 reporting week — Monday, March 1 — with no sunspots, so the average daily sunspot number declined slightly from 19.6 to 18.9. Two new sunspot groups (2806 and 2807) appeared on Tuesday, March 2. Average daily solar flux increased only slightly during the reporting …

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