#spaceweather โ Public Fediverse posts
Live and recent posts from across the Fediverse tagged #spaceweather, aggregated by home.social.
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Space Weather
Proton storm building
A solar energetic particle storm is building following an eruption from beyond the east limb.
Goes >=10MeV proton levels are approaching the S1 minor radiation storm level.
Electron levels are also rising. Electron charging can cause issues to satellite electronics. Energetic protons can also upset data on satellite computers.
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2026-08-22 00:00:00 UTC
HOW IS SPACE WEATHER NOW?
CURRENT CONDITIONS:
๐ก Solar Wind: 473.7 km/s (1 h avg)FORECAST FOR TODAY:
๐ข Radio Blackout: R0
- No effects๐ข Solar Radiation Storm: S0
- No effects๐ข Geomagnetic Storm: G0
- No effects -
Space Weather
Another look at this morning's long duration flare which peaked at M1.6 at around 09h50 UT. The flare originated from AR4507 which was slightly beyond the west limb. This has become the customary location for large flares during this solar cycle!
The X-ray flux is still falling and is now at C3.4, over four hours since the flare occurred.
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Space Weather
A short movie from NASA SDO and SOHO showing the flare location and CME.
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Space Weather
A long duration M-level flare is in progress.
The flare started at 09h30 UT 21 Aug and reached a maximum of M1.6 between 09h50 and 10h25 UT. The X-ray flux is now falling very slowly and is currently at M1.3.
A minor R1 radio blackout is affecting Africa and southern Europe.
A type II radio emission has been detected, indicating the release of another CME, which can be seen on the third image.
The flare originates from AR4507 which is now just beyond the west limb.
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2026-08-21 00:00:00 UTC
HOW IS SPACE WEATHER NOW?
CURRENT CONDITIONS:
๐ก Solar Wind: 513.6 km/s (1 h avg)FORECAST FOR TODAY:
๐ข Radio Blackout: R0
- No effects๐ข Solar Radiation Storm: S0
- No effects๐ข Geomagnetic Storm: G0
- No effects -
The effect of today's M8.1 #solarflare (and two smaller flares) can nicely be observed on the 24h view of my 30m #QRSS and #WSPR grabber.
The signals arriving via skywave dip into the noise, as does the propagated noise (from thunderstorms and human generated garbage). My local transmitter at a distance of 15 km stays stable. Thanks to the low noise, during that time some airplane scatter fragments could be seen that would otherwise have been in the noise.
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#SpaceWeather #Solar #sflorg
Geophysical Alert MessageSolar-terrestrial indices for 19 August follow.
Solar flux 126 and estimated planetary A-index 20.
The estimated planetary K-index at 1200 UTC on 20 August was 2.00.Space weather for the past 24 hours has been moderate.
Radio blackouts reaching the R2 level occurred.No space weather storms are predicted for the next 24 hours.
https://www.sflorg.com/p/space-weather.html -
Space Weather
A moderate M8.1 solar flare peaked at 11h42 UT 20 Aug. An R2 radio blackout affected Africa and Europe.
This is the third flare >M level within 24 hours.
A type II radio emission was detected at 1,200km/s, indicating that a CME was released.
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Space Weather
Moderate solar flare in progress, now above M6. Standby for updates.
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Space Weather
An M1.8 solar flare peaked at 08h04 UT 20 Aug. A minor radio blackout is affecting eastern Africa and the Middle East.
This is the second M-flare in 24 hours. There was an M1.0 yesterday at 18h53 UT 19 Aug.
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2026-08-20 00:00:00 UTC
HOW IS SPACE WEATHER NOW?
CURRENT CONDITIONS:
๐ด Solar Wind: 576.9 km/s (1 h avg)FORECAST FOR TODAY:
๐ข Radio Blackout: R0
- No effects๐ข Solar Radiation Storm: S0
- No effects๐ข Geomagnetic Storm: G0
- No effects -
#SpaceWeather #Solar #sflorg
Geophysical Alert MessageSolar-terrestrial indices for 18 August follow.
Solar flux 125 and estimated planetary A-index 25.
The estimated planetary K-index at 1500 UTC on 19 August was 2.67.Space weather for the past 24 hours has been minor.
Geomagnetic storms reaching the G1 level occurred.Space weather for the next 24 hours is predicted to be minor.
Geomagnetic storms reaching the G1 level are likely.
https://www.sflorg.com/p/space-weather.html -
Space Weather
Continuing minor geomagnetic activity is causing HF radio to be degraded. Proton flux is also increasing out at L1 so further degradation may follow in high latitude and polar regions.
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2026-08-19 00:00:00 UTC
HOW IS SPACE WEATHER NOW?
CURRENT CONDITIONS:
๐ด Solar Wind: 559.3 km/s (1 h avg)FORECAST FOR TODAY:
๐ข Radio Blackout: R0
- No effects๐ข Solar Radiation Storm: S0
- No effects๐ก Geomagnetic Storm: G1
- Weak power grid fluctuations
- Aurora is visible at high latitudes -
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Space Weather
Another burst of geomagnetic activity is hitting Earth. A minor G1 storm is again in progress.
The solar wind speed has increased above 550km/s, and the DST (Disturbance Storm Time Index) has dropped to -43nT. Bz (magnetic polarity) is currently positive, so prospects for aurora are poor right now but that could change quickly.
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#SpaceWeather #Solar #sflorg
Geophysical Alert MessageSolar-terrestrial indices for 17 August follow.
Solar flux 124 and estimated planetary A-index 11.
The estimated planetary K-index at 1200 UTC on 18 August was 2.33.Space weather for the past 24 hours has been minor.
Geomagnetic storms reaching the G1 level occurred.Space weather for the next 24 hours is predicted to be minor.
Geomagnetic storms reaching the G1 level are likely.
https://www.sflorg.com/p/space-weather.html -
Space Weather
Minor G1 geomagnetic storm conditions were reached at 05h UT this morning. The Kp level reached KP 5.
Conditions are now calming, but the solar wind will remain disturbed for most of the day.
HF propagation is generally not great, but is worse over the polar regions.
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2026-08-18 00:00:00 UTC
HOW IS SPACE WEATHER NOW?
CURRENT CONDITIONS:
๐ข Solar Wind: 398.9 km/s (1 h avg)FORECAST FOR TODAY:
๐ข Radio Blackout: R0
- No effects๐ข Solar Radiation Storm: S0
- No effects๐ข Geomagnetic Storm: G0
- No effects -
Space Weather
The solar wind is currently disturbed as a solar storm is grazing past us. The Disturbance Storm Time Index (DST) has dropped rapidly and is now at -27nT. The solar wind density is high at 15.6cm3, and wind speed is rising and is above 400km/s. Bz is currently negative. The Hp30 index briefly bumped up to storm level between 16h and 16h30 UT, but is now back down.
NOAA SWPC did not put a storm watch in place. Disturbed conditions may continue for several hours.
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#SpaceWeather #Solar #sflorg
Geophysical Alert MessageSolar-terrestrial indices for 16 August follow.
Solar flux 129 and estimated planetary A-index 4.
The estimated planetary K-index at 1200 UTC on 17 August was 1.33.No space weather storms were observed for the past 24 hours.
No space weather storms are predicted for the next 24 hours.
https://www.sflorg.com/p/space-weather.html -
2026-08-17 00:00:00 UTC
HOW IS SPACE WEATHER NOW?
CURRENT CONDITIONS:
๐ข Solar Wind: 297.6 km/s (1 h avg)FORECAST FOR TODAY:
๐ข Radio Blackout: R0
- No effects๐ข Solar Radiation Storm: S0
- No effects๐ข Geomagnetic Storm: G0
- No effects -
#SpaceWeather #Solar #sflorg
Geophysical Alert MessageSolar-terrestrial indices for 15 August follow.
Solar flux 117 and estimated planetary A-index 6.
The estimated planetary K-index at 1200 UTC on 16 August was 1.67.No space weather storms were observed for the past 24 hours.
No space weather storms are predicted for the next 24 hours.
https://www.sflorg.com/p/space-weather.html -
Space Weather
We had a filament eruption in the south-east quadrant yesterday. That, combined with a large far-sided blast, released a messy solar storm with some solar material heading towards Earth.
Geomagnetic conditions may reach G1 levels on the 17th and/or 18th.
This solar cycle is now well into the declining phase, and the "style" of how solar storms are generated is changing to becoming more coronal-hole driven.
Dr Scott McIntosh says that coronal holes are a poorly understood science (mainly due to a lack of funding to support research over the last 20 years). Coronal holes are gaps in the solar atmosphere where bursts of solar wind can stream out and cause solar storms with little warning. During solar minimum these events are less eruptive, but nonetheless potent.
The F10.7 solar flux is dropping, and we'll be getting very few flares. Experts do warn that there still exists the potential for a few very large events as the reach solar-minimum, but then we'll have periods lasting months with no sunspots at all.
Watch Dr Scott McIntosh discuss this solar cycle on Space Weather Unplugged with Marybeth and Tanya here:
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2026-08-16 00:00:00 UTC
HOW IS SPACE WEATHER NOW?
CURRENT CONDITIONS:
๐ข Solar Wind: 346.9 km/s (1 h avg)FORECAST FOR TODAY:
๐ข Radio Blackout: R0
- No effects๐ข Solar Radiation Storm: S0
- No effects๐ข Geomagnetic Storm: G0
- No effects -
M7.7 #earthquake strikes #Indonesia generating a #Tsunami
watch #StefanBurns updating you #live now
https://www.youtube.com/live/dbOMEa6t12Y?
#press #news #IndependentMedia #IndependentScience #science #SpaceWeather #earth
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M7.7 #earthquake strikes #Indonesia generating a #Tsunami
watch #StefanBurns updating you #live now
https://www.youtube.com/live/dbOMEa6t12Y?
#press #news #IndependentMedia #IndependentScience #science #SpaceWeather #earth
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2026-08-15 00:00:00 UTC
HOW IS SPACE WEATHER NOW?
CURRENT CONDITIONS:
๐ข Solar Wind: 378.6 km/s (1 h avg)FORECAST FOR TODAY:
๐ข Radio Blackout: R0
- No effects๐ข Solar Radiation Storm: S0
- No effects๐ข Geomagnetic Storm: G0
- No effects -
What stops a solar eruption from escaping the Sun? โ๏ธ
On the next #SETILive, Dr. Becca Robinson talks with Dr. Kathy Reeves about new research on a solar eruption that roseโthen collapsedโand the magnetic forces that stopped it.
๐ Aug. 20 | 2:30 pm PDT
๐ด https://youtube.com/live/N214VE49Lf0