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G7IZU Radio Reflection Detection

@g7izu.bsky.social

170 followers 73 following 900 posts

Space Weather, Amateur Radio, Flight Simulation, Sciency stuff 📡 Long posts may be split after being forwarded from Mastodon. G7IZU Radio Reflection Detection Website: https://www.tvcomm.co.uk/g7izu/ #spaceweather #amateurradio #aurora #g7izu

www.tvcomm.co.uk

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G7IZU Radio Reflection Detection @g7izu.bsky.social · 6h

I think the outage was mostly confined to Vodafone and a few mobile carriers.

G7IZU Radio Reflection Detection @g7izu.bsky.social · 6h

Turns out it was a Vodafone issue which also affected a few mobile providers who use Vodafone to pipe their services. When I posted the message Down Detector was showing a spike in reports for many providers. I'm presuming you are not on Vodafone so we're ok.

G7IZU Radio Reflection Detection @g7izu.bsky.social · 7h

Space Weather

More images of the limb eruption at 20h30 UT 14 Oct. AR4246 is in the foreground.

#spaceweather
#g7izu

G7IZU Radio Reflection Detection @g7izu.bsky.social · 8h

A large prominence erupted from the north-west limb at around the same time. More pictures to follow.

#spaceweather
#g7izu

G7IZU Radio Reflection Detection @g7izu.bsky.social · 8h

Space Weather

An M3.2 flare peaked at 20h38 UT 14 Oct. An R2 radio blackout affected the eastern Pacific region. The flare again originated from AR4246.

Multiple CMEs (coronal mass ejections) from AR4246 are inbound to Earth. Geomagnetic storms are predicted between 15-17 Oct.

Plot of solar flux and dashboard items showing solar data.

D-layer absorption map (D-RAP) indicating with bright colours the area of an R2 radio blackout.

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G7IZU Radio Reflection Detection @g7izu.bsky.social · 18h

Space Weather

An M2.0 flare erupted from AR4246 and peaked at 00h41 UT 14 Oct.

#spaceweather
#g7izu

Plot of solar XRay Flux. The M2.0 flare is highlighted.

Nasa/SDO image of the sun using filter AIA131. The M2.0 flare is seen in the centre of the image.

G7IZU Radio Reflection Detection @g7izu.bsky.social · 1d

#g7izu

G7IZU Radio Reflection Detection @g7izu.bsky.social · 1d

Space Weather

An M1.3 flare peaked at 13h18 UT 13 Oct. A type II radio emission was observed, indicating the potential for a CME being launched.

The flare originated from Earth-facing active region AR4246, which has been responsible for several flares during the last 24 hours.

#spaceweather

NASA/SDO image using filter AIA131 of an M1.3 flare erupting from AR4246 at 13h18 UT 13 Oct 2025.

G7IZU Radio Reflection Detection @g7izu.bsky.social · 1d

Good news, we're back online!

G7IZU Radio Reflection Detection @g7izu.bsky.social · 1d

The outage is now entering its third hour. I'm only getting this message out because the connection at work is ok.

G7IZU Radio Reflection Detection @g7izu.bsky.social · 1d

As a consequence the propagation maps on my website are not updating. Please check back periodically for further updates.

https://www.tvcomm.co.uk/g7izu/

#broadband
#bt
#o2
#g7izu

G7IZU Radio Reflection Detection @g7izu.bsky.social · 1d

Service outage

Vodafone in the UK and most major UK internet and mobile providers are currently suffering a major outage with broadband service. Basic mobile voice and text appears still to be working. I'm not yet aware how widely this outage has spread.

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G7IZU Radio Reflection Detection @g7izu.bsky.social · 1d

Increasing solar activity has increased noise on the HF bands. Conditions on HF are mostly "fair" at this time.

#spaceweather
#amateurradio
#radiopropagation
#g7izu

G7IZU Radio Reflection Detection @g7izu.bsky.social · 1d

Space Weather

An M2.7 flare peaked at 09h19 UT from almost Earth-facing region AR4246. A minor R1 radio blackout affected eastern and southern Africa.

An M1.9 flare also erupted from AR4246 at 05h27 UT 13 Oct.

Image of the sun taken by NASA/SDO using filter AIA131. An M2.7 flare erupted from active region AR4246 at 09h19 UT on 13 Oct 2025. AR4246 is slightly north-east of the centre of the solar disc.

DRAP (D-layer absorption) map during the M2.7 flare. Bright colours indicate that a minor R1 radio blackout occurred over Africa during the flare.

Plot of solar xray flux during the last 6 hours.

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G7IZU Radio Reflection Detection @g7izu.bsky.social · 2d

Oh, now I am!

G7IZU Radio Reflection Detection @g7izu.bsky.social · 2d

It's curious that I'm not hearing any FT8 from that direction tonight. Propagation is a fickle thing!

G7IZU Radio Reflection Detection @g7izu.bsky.social · 2d

#g7izuVideo: https://universeodon.com/@g7izu/115363365018203568

𝑮7𝑰𝙕𝑼 𝑹𝙍𝑫 (@[email protected])

Attached: 1 video Radio Propagation Quite good VHF tropospheric propagation tonight is sending me the Swiss 2m beacon HB9HB in JN37 on 144.448 MHz. Distance 912km bearing 108°. Received using Airspy HF+ with a Youloop. #radiopropagation #amateurradio #hb9hb #g7izu

universeodon.com

G7IZU Radio Reflection Detection @g7izu.bsky.social · 2d

Radio Propagation

Quite good VHF tropospheric propagation tonight is sending me the Swiss 2m beacon HB9HB in JN37 on 144.448 MHz. Distance 912km bearing 108°. Received using Airspy HF+ with a Youloop.

#radiopropagation
#amateurradio
#hb9hb

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G7IZU Radio Reflection Detection @g7izu.bsky.social · 2d

Listen here: https://www.bbc.co.uk/sounds/play/w3ct6yfy

#gnss
#gps
#gpsinterference
#g7izu

Science In Action - A mystery satellite has been jamming GPS in Europe - BBC Sounds

Scientists detect for the first time an unknown source of GPS interference from space.

www.bbc.co.uk

G7IZU Radio Reflection Detection @g7izu.bsky.social · 3d

#radiopropagation
#amateurradio
#g7izu

G7IZU Radio Reflection Detection @g7izu.bsky.social · 3d

Radio Propagation

FT8 is propagating well on 2m tropo from Poland into my Youloop and Airspy HF+. Distance 1,423km. Also decoding Denmark, Germany France and northern Spain.

This aligns well with the tropospheric radio forecast by F5LEN.

https://tropo.f5len.org/forecasts-for-europe/

Map from PSK Reporter highlighting SQ3GJS received by G7IZU via FT8 modulation on 2m band at 17h23 UT 11 Oct.

Map from PSK Reporter highlighting EA1AAA received by G7IZU via FT8 modulation on 2m band at 17h08 UT 11 Oct.

Tropospheric radio propagation forecast for 18h UT 11 Oct 2025 by F5LEN

G7IZU Radio Reflection Detection @g7izu.bsky.social · 5d

Space Weather

After a long period of quiet, an M2.0 flare erupted from very slightly behind the west limb at 12h30 UT 09 Oct.

It was accompanied by an impressive loop of material that fell back into the sun.

#spaceweather
#g7izu

NASA/SDO image of the M2.0 flare (filter AIA304)

NASA/SDO image of the M2.0 flare (filter AIA131)

G7IZU Radio Reflection Detection @g7izu.bsky.social · 6d

For offline mapping I'm using Hamclock and Grid Tracker.

#radiopropagation
#amateurradio
#g7izu
#wspr
#ft8

G7IZU Radio Reflection Detection @g7izu.bsky.social · 6d

I'm currently decoding all WSPR and FT8 bands using two instances of WSJT-X v3, using the HF+ for WSPR and a Yaesu FT857D for FT8, feeding data to https://wspr.aprsinfo.com/ for WSPR and https://shorturl.at/ENYjH (PSK Reporter) for FT8. All HF bands are scanned several times per hour.

G7IZU Radio Reflection Detection @g7izu.bsky.social · 6d

Also on the map is Polish station SQ3XZ on 21 MHz running only 1mW! Offscreen, I'm also receiving VK3QN near Melbourne running 5W. WSPR is a low-power data mode which takes 2 minutes to send a message, usually consisting of just a callsign, locator and power level information.