I had to laugh at this alert from @disasters
An earthquake in an unknown place affected nobody...
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Radio Propagation
As an area of high pressure is moving back into northern Europe and the British Isles this weekend, an associated area of "weak" to "good" tropospheric radio propagation tries to push in too. Enhanced radio conditions may reduce by the end of the weekend, although they may improve again later in the week.
Enhanced tropospheric radio conditions extend the normal range of VHF and higher signals beyond their normal range.
[#]radiopropagation
[#]tropo
[#]amateurradio
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Space Weather
This close-up movie of the M6.7 flare at 14h 06 UT reveals that it was more of a triple flare!
[#]spaceweather
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Space Weather
Solar Flare Alert: An M.6.7 flare peaked at 14h06 UT 31 Jan. An R2 radio blackout affected HF bands in the S America and the South Atlantic regions.
[#]spaceweather
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Space Weather
A large coronal hole is facing Earth. It is expected to be sending a strong stream of solar wind our way which could cause some disturbed geomagnetic activity in the coming days.
[#]spaceweather
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Amateur Radio
First two-way contact via geostationary satellite bounce
Author: Jan van Muijlwijk PA3FXB
Photo: Erik Tiddens PE1ET
"In an exciting first, we managed to successfully complete a two-way contact by bouncing a signal off a geostationary satellite. The satellite in question, Inmarsat GX-5, is stationed at an altitude of over 35,000 kilometers, and together with Dan, HB9Q, in Switzerland, we alternated between transmitting towards the satellite and receiving reflections. This first ever amateur QSO over geo satellite the remarkable capabilities of modern amateur radio technology when paired with large, high-gain dishes."
Read more: https://www.camras.nl/en/blog/2025/first-two-way-contact-via-geostationary-satellite-bounce/
[#]amateurradio
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Streaming radio
It might have been around for ages, but today I just came across what might be the biggest and most comprehensive collection of online radio streams. You could waste hours looking for different streams here!
https://fmstream.org/index.php?c=FT
[#]radio
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Terrestrial Weather
As Storm Hermania advanced over the British Isles, the 35 GHz cloud radar at Chilbolton in Hampshire recorded the descending cloud height of the warm front, all the way to the ground.
[#]weather
[#]hermania
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The sea at Golden Cap in Dorset just now.
[#]weather
[#]Hermania
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Terrestrial Weather
The second major winter storm in a week has reached the British Isles today. Storm Herminia currently has a central pressure of 950mB and is approaching Ireland. Strong winds and heavy rain will affect the whole British Isles for the next two days or so. There will be snow in the far north.
A further deep low may affect south-west England/northern France on Wednesday.
[#]weather
[#]Herminia
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Good evening from Plymouth and also Golden Cap, Dorset.
[#]sunset
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Terrestrial Weather
Storm Éowyn over the British Isles, from the Terra satellite.
Ireland recorded record wind speeds, and over 700,000 homes have lost power.
https://www.bbc.co.uk/news/articles/c78x4503neyo
[#]weather
[#]eowyn
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Terrestrial Weather
The jetstream is running at around 300km/h over the mid-Atlantic.
Storm Éowyn may linger over the British Isles for several days. This particular GFS run (12h, 23 Jan) shows the center of the storm over Wales on Tuesday, although most models currently have the storm moving away to the north east.
[#]weather
[#]eowyn
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Terrestrial Weather
Severe weather has begun to hit the British Isles with a brief tornado being reported near Newquay in Cornwall which caused damage to roofs and vehicles. A very active and thundery sqwall line passed through the south-west on Thursday morning.
Storm Éowyn continues to roll in from the Atlantic, with a forecast central pressure of below 940mB. Peak winds should be reaching Ireland very early on Friday.
Stormy weather continues into next week with a series of smaller low pressures spinning around the main area. The Met Office has issued a number of red and amber warnings for the UK.
https://weather.metoffice.gov.uk/warnings-and-advice/uk-warnings#?date=2025-01-24
[Note that this is not an official forecast. Please check your local met service and media for official forecasts!]
[#]weather
[#]eowyn
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Terrestrial Weather
Extreme weather will be affecting the British Isles in the coming days. Storm Éowyn is sporting a forecast central pressure of 933mB on Friday!
Exceptional hurricane force winds >110mph are expected over Ireland, 80-90 mph over the north of the UK.
Another (so far unnamed) storm on Sunday and into early next week is forecast with a central pressure of 949mB (on Monday), and stronger winds are expected in the south of the UK.
[Please note that this is not an official forecast. Please check with your local met services and media for official forecasts!]
[#]weather
[#]Éowyn
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Radio Propagation
Strong tropospheric radio propagation is continuing today across northern Europe thanks to a large high pressure area. This is enhancing the range of VHF/UHF signals well beyond the normal range.
[#]radiopropagation
[#]amateurradio
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Radio Propagation
Tropospheric radio propagation is continuing to affect Northern Europe and the south of the UK.
F5LEN's tropospheric forecast predicts "good" to "strong" across the region for at least the next 48 hours.
[#]amateurradio
[#]radiopropagation
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Space Weather
Solar Flare Alert: An M7.4 flare peaked at 13h35 UT 17 Jan. An R2 radio blackout affected the HF bands across S America and S Atlantic regions.
This was the fifth M-class flare since 00h UT 17 Dec. The others were of XRay flux level M2 or below, on the NOAA scale. The scales can be seen here on the NOAA website:
https://www.swpc.noaa.gov/noaa-scales-explanation
[#]spaceweather
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Radio Propagation
Enhanced tropospheric radio propagation is continuing across Europe today, but it's most intense over the North Sea right now.
[#]radiopropagation
[#]amateurradio
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Admin note:
To potential new followers on Mastodon and BSky
Just a note to potential new followers that I won't approve accounts that 1) appear to be a bot, 2) have no bio saying who they are or 3) appear to be overtly political or abusive in nature.
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text/gemini
