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The K7RA Solar Update

Another week passed with no sunspots, and as of February 14 it has been over two weeks since any sunspots were observed, the last on January 30. February 7 through 13 saw average daily solar flux decline from 71.1 to 70.4, compared to the previous seven days. Geomagnetic indices were lower, with average daily planetary A index declining from 11.6 …

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Propagation News – 17 February 2019

We had another spotless week as the Sun continued its decline into solar minimum. Geomagnetic conditions were varied with the beginning of week seeing the Kp index hitting one and two. But this didn’t last due to ongoing coronal hole activity, which saw the Kp index climb to three and four by Wednesday, the 13th, and Thursday, the 14th. To …

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Propagation outlook from Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2019 Feb 11 0402 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 04 – 10 February 2019 Solar activity was at very low levels. …

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The K7RA Solar Update

Solar wind pushed geomagnetic indicators higher last week (on February 1-2), and average planetary A index rose from 7 (for the seven days ending January 30) to 11.6 on January 31 through February 6. When geomagnetic conditions are active, we usually see higher indices at high latitudes. Alaska’s college A index (measured at a magnetometer near Fairbanks) was 40 on …

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Propagation News – 10 February 2019

Matter from a solar coronal hole pushed the Kp index to five in the early hours of Friday, the 1st, eventually resulting in much reduced maximum usable frequencies as the ionosphere was depleted. Signals on Saturday, the 2nd, were noticeably poorer, with even 14MHz struggling. There were also reports of very visible aurora around the Arctic Circle. But the ionosphere …

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W4HM Daily HF-MF Radio Wave Propagation Forecast #2019-36

Greetings to my fellow hamateur radio and SWL radio enthusiasts around theworld.   Welcome to my “not for profit” W4HM Daily HF-MF Radio Wave PropagationForecast.   It’s the only accurate daily global HF-MF radio wave propagation forecast produced on the planet.   I’m a heliophysicist, terrestrial/troposphere meteorologist/climatologist, physical oceanographer and one of the few on the planet with advanced education …

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Propagation outlook from Boulder

:Product: Weekly Highlights and Forecasts :Issued: 2019 Feb 04 0309 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 28 January – 03 February 2019 Solar activity was at low levels. …

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W4HM Daily HF-MF Radio Wave Propagation Forecast #2019-35

Greetings to my fellow hamateur radio and SWL radio enthusiasts around the world.   Welcome to my “not for profit” W4HM Daily HF-MF Radio Wave Propagation Forecast.   It’s the only accurate daily global HF-MF radio wave propagation forecast produced on the planet.   I’m a heliophysicist, terrestrial/troposphere meteorologist/climatologist, physical oceanographer and one of the few on the planet with …

Read More »

W4HM Daily HF-MF Radio Wave Propagation Forecast 2019-34

Greetings to my fellow hamateur radio and SWL radio enthusiasts around the world.   Welcome to my “not for profit” W4HM Daily HF-MF Radio Wave Propagation Forecast.   It’s the only accurate daily global HF-MF radio wave propagation forecast produced on the planet.   I’m a heliophysicist, terrestrial/troposphere meteorologist/climatologist, physical oceanographer and one of the few on the planet with …

Read More »

W4HM Daily HF-MF Radio Wave Propagation Forecast #2019-33

Greetings to my fellow hamateur radio and SWL radio enthusiasts around the world. Welcome to my “not for profit” W4HM Daily HF-MF Radio Wave Propagation Forecast. It’s the only accurate daily global HF-MF radio wave propagation forecast produced on the planet. I’m a heliophysicist, terrestrial/troposphere meteorologist/climatologist, physical oceanographer and one of the few on the planet with advanced education and forecast experience …

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The K7RA Solar Update

The past week saw increased solar activity, with average daily sunspot numbers rising from 5.3 to 19.6 and average daily solar flux from 69.8 to 74.5. We haven’t seen such strong activity since the beginning of last summer, when ARLP016 in 2018 reported average daily sunspot number at 22.6 and average daily solar flux at 75.3. But sunspots only persisted …

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Propagation News – 3 February 2019

Last week was a mixed bag in terms of HF propagation. The solar flux index was a little higher at 74, helped by a sunspot group that has now rotated out of view. Geomagnetic conditions were very settled in the first half of the week with the Kp index often sitting at zero. It seems quite a while since the …

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