Austrian Space Weather Office
@aswogeosphere.bsky.social
Inventing the next generation of space weather prediction at the
GeoSphere Austria. | ☀️ @erc.europa.eu HELIO4CAST | funded by @fwf-at.bsky.social | https://helioforecast.space | https://geosphere.at/en/topics/disaster-protection/space-weather
GeoSphere Austria. | ☀️ @erc.europa.eu HELIO4CAST | funded by @fwf-at.bsky.social | https://helioforecast.space | https://geosphere.at/en/topics/disaster-protection/space-weather
Pinned
The #northernlights were also seen at the Sonnblick Observatory from the GeoSphere Austria early on Nov 12 2025!
credits: Herman Scheer / foto-webcam.eu
credits: Herman Scheer / foto-webcam.eu
Hannah T. Rüdisser @hannahruedisser.bsky.social represented the Austrian Space Weather Office and GeoSphere Austria at the Exner medal lecture for Sepp Hochreiter @hochreitersepp.bsky.social in Vienna yesterday, talking about the usage of AI in #spaceweather!
November 20, 2025 at 2:17 PM
Hannah T. Rüdisser @hannahruedisser.bsky.social represented the Austrian Space Weather Office and GeoSphere Austria at the Exner medal lecture for Sepp Hochreiter @hochreitersepp.bsky.social in Vienna yesterday, talking about the usage of AI in #spaceweather!
Here is todays Nov 14 #solarstorm (NOT Earth directed 🙃) in its full glory - it has one super interesting feature concerning future #spaceweather missions!
Guess which 🤔
First the solar source as imaged in extreme ultraviolet by NASA/SDO:
Guess which 🤔
First the solar source as imaged in extreme ultraviolet by NASA/SDO:
November 14, 2025 at 3:27 PM
Here is todays Nov 14 #solarstorm (NOT Earth directed 🙃) in its full glory - it has one super interesting feature concerning future #spaceweather missions!
Guess which 🤔
First the solar source as imaged in extreme ultraviolet by NASA/SDO:
Guess which 🤔
First the solar source as imaged in extreme ultraviolet by NASA/SDO:
The coronagraph CCOR-1 already sees the solar storm from the ongoing flare X4 flare (peak Friday Nov 14 2025 8:30 UT), however the active region is quite far away at west 60° so only a glancing blow is expected at Earth.
The Kanzelhöhe Observatory @uni-graz.at imaged the flare too!
The Kanzelhöhe Observatory @uni-graz.at imaged the flare too!
November 14, 2025 at 8:55 AM
The coronagraph CCOR-1 already sees the solar storm from the ongoing flare X4 flare (peak Friday Nov 14 2025 8:30 UT), however the active region is quite far away at west 60° so only a glancing blow is expected at Earth.
The Kanzelhöhe Observatory @uni-graz.at imaged the flare too!
The Kanzelhöhe Observatory @uni-graz.at imaged the flare too!
With nighttime images (NOAA-21 / VIIRS) obtained through NASA worldview the southern auroral boundary can be seen for 2025 November 12 and 13, however, note that the red #aurora that many people see at mid latitudes (central Europe, southern USA) is not visible here.
worldview.earthdata.nasa.gov
worldview.earthdata.nasa.gov
November 13, 2025 at 12:45 PM
With nighttime images (NOAA-21 / VIIRS) obtained through NASA worldview the southern auroral boundary can be seen for 2025 November 12 and 13, however, note that the red #aurora that many people see at mid latitudes (central Europe, southern USA) is not visible here.
worldview.earthdata.nasa.gov
worldview.earthdata.nasa.gov
During the night the expected #solarstorm arrived in full, with a speed of almost 1000 km/s which matched the predicted speed very well! The Dst index was not pushed below the previous night during the arrival of a left handed, low inclination North-West-South magnetic flux rope in the storm's core.
November 13, 2025 at 8:00 AM
During the night the expected #solarstorm arrived in full, with a speed of almost 1000 km/s which matched the predicted speed very well! The Dst index was not pushed below the previous night during the arrival of a left handed, low inclination North-West-South magnetic flux rope in the storm's core.
Fairly as anticipated, on Wed Nov 12 2025 18:53 UT the shock arrived from the X5 flare #solarstorm from Tue Nov 11! At 40 nT and ~ 900 km/s in the sheath, it has a strong potential for a prolongement of the ongoing geomagnetic storm (-118 nT Dst).
Happy #aurora hunting at high- and mid latitudes!
Happy #aurora hunting at high- and mid latitudes!
November 12, 2025 at 8:22 PM
Fairly as anticipated, on Wed Nov 12 2025 18:53 UT the shock arrived from the X5 flare #solarstorm from Tue Nov 11! At 40 nT and ~ 900 km/s in the sheath, it has a strong potential for a prolongement of the ongoing geomagnetic storm (-118 nT Dst).
Happy #aurora hunting at high- and mid latitudes!
Happy #aurora hunting at high- and mid latitudes!
A shock arrived Nov 12 7:32 UT at Solar Orbiter, from the early Tue Nov 11 X5 flare #solarstorm. Reminder: SolO is at 17.5° east, 10.3° north of Earth, 0.83 au, so our forecast should be taken with a grain of salt as its quite a bit away from the Sun Earth-line - it will not fully match L1 data.
November 12, 2025 at 1:32 PM
A shock arrived Nov 12 7:32 UT at Solar Orbiter, from the early Tue Nov 11 X5 flare #solarstorm. Reminder: SolO is at 17.5° east, 10.3° north of Earth, 0.83 au, so our forecast should be taken with a grain of salt as its quite a bit away from the Sun Earth-line - it will not fully match L1 data.
Great timelapse from early Nov 12 2025 taken on Koralpe mountain in southern Austria!
#Aurora is dancing 😍
Zeitraffer vom Sonnensturm heute morgen. Aufgenommen auf der Koralpe, 46°47'48"N 14°57'17"E.
#Timelapse #MidLatitude #NorthernLights #Stormhour
cc @alpenwetter.bsky.social @nikzimmer87.bsky.social @aswogeosphere.bsky.social @kachelmannwetter.com @marcuswadsak.bsky.social
Zeitraffer vom Sonnensturm heute morgen. Aufgenommen auf der Koralpe, 46°47'48"N 14°57'17"E.
#Timelapse #MidLatitude #NorthernLights #Stormhour
cc @alpenwetter.bsky.social @nikzimmer87.bsky.social @aswogeosphere.bsky.social @kachelmannwetter.com @marcuswadsak.bsky.social
November 12, 2025 at 9:53 AM
Great timelapse from early Nov 12 2025 taken on Koralpe mountain in southern Austria!
The #northernlights were also seen at the Sonnblick Observatory from the GeoSphere Austria early on Nov 12 2025!
credits: Herman Scheer / foto-webcam.eu
credits: Herman Scheer / foto-webcam.eu
November 12, 2025 at 7:46 AM
The #northernlights were also seen at the Sonnblick Observatory from the GeoSphere Austria early on Nov 12 2025!
credits: Herman Scheer / foto-webcam.eu
credits: Herman Scheer / foto-webcam.eu
Resulting in a massive maximum total magnetic field of 63 nT, presumably the #solarstorm from Monday morning arrived 2025 Nov 11 23:38 at L1, and interacted with the previous storm just before it arrived at the L1 point near Earth. Dst reached - 238 nT, which is the 3rd strongest storm of this cycle
November 12, 2025 at 7:39 AM
Resulting in a massive maximum total magnetic field of 63 nT, presumably the #solarstorm from Monday morning arrived 2025 Nov 11 23:38 at L1, and interacted with the previous storm just before it arrived at the L1 point near Earth. Dst reached - 238 nT, which is the 3rd strongest storm of this cycle
Some #aurora photos from southern Austria early Nov 12 2025.
November 12, 2025 at 7:32 AM
Some #aurora photos from southern Austria early Nov 12 2025.
The @esa.int Solar Orbiter spacecraft was impacted by a #solarstorm! We think it was the one that erupted on early Mon Nov 10. We model its arrival at Nov 12 ~2:30 UT at L1, with the previous one from Sun Nov 9 showing up with only a small signature here. The X5 flare storm is due tomorrow at SolO!
November 11, 2025 at 5:43 PM
The @esa.int Solar Orbiter spacecraft was impacted by a #solarstorm! We think it was the one that erupted on early Mon Nov 10. We model its arrival at Nov 12 ~2:30 UT at L1, with the previous one from Sun Nov 9 showing up with only a small signature here. The X5 flare storm is due tomorrow at SolO!
The #solarstorm from the X5 flare on Tue Nov 11 has an initial speed of 1800 km/s. We model it to arrive at Earth on Wed Nov 12 18:24 CET ± 6 hours (ELEvo method). The night from Wednesday to Thursday now looks better in terms of #aurora, and if the storm is strong maybe GNSS errors are possible.
November 11, 2025 at 4:03 PM
The #solarstorm from the X5 flare on Tue Nov 11 has an initial speed of 1800 km/s. We model it to arrive at Earth on Wed Nov 12 18:24 CET ± 6 hours (ELEvo method). The night from Wednesday to Thursday now looks better in terms of #aurora, and if the storm is strong maybe GNSS errors are possible.
The SOHO LASCO instrument is drowned in solar energetic particles due to the X5 flare earlier today Nov 11. A bit west of the disk center the particles are magnetically well connected to Earth. A massive #solarstorm was produced which we will model once initial conditions are available.
November 11, 2025 at 3:36 PM
The SOHO LASCO instrument is drowned in solar energetic particles due to the X5 flare earlier today Nov 11. A bit west of the disk center the particles are magnetically well connected to Earth. A massive #solarstorm was produced which we will model once initial conditions are available.
Reposted by Austrian Space Weather Office
Ongoing solar radiation storm originating at 10:15 this morning. Initial airborne data and model results are indicating this was an ICAO severe radiation event for aviation.
Airborne instruments are still operating to collect the end of the event
#spaceweather #aviation #avgeek
Airborne instruments are still operating to collect the end of the event
#spaceweather #aviation #avgeek
November 11, 2025 at 3:23 PM
Ongoing solar radiation storm originating at 10:15 this morning. Initial airborne data and model results are indicating this was an ICAO severe radiation event for aviation.
Airborne instruments are still operating to collect the end of the event
#spaceweather #aviation #avgeek
Airborne instruments are still operating to collect the end of the event
#spaceweather #aviation #avgeek
We just got an X5 flare from the same active region that launched the 2 #solarstorms earlier this week, at around 20 degrees north and west of disk center. We will again need to see whether a storm was launched with coronagraphs and then evaluate its potential arrival at Earth in the upcoming days.
November 11, 2025 at 10:58 AM
We just got an X5 flare from the same active region that launched the 2 #solarstorms earlier this week, at around 20 degrees north and west of disk center. We will again need to see whether a storm was launched with coronagraphs and then evaluate its potential arrival at Earth in the upcoming days.
The source region of both #solarstorms, one from early Sunday Nov 9, and the other from early Monday Nov 10, are (as usual) complex. Judging from the main neutral line, where the +/white, and -/black magnetic fields meet, we may expect a magnetic field rotation as south-east-north (SEN) or ENW.
November 11, 2025 at 9:37 AM
The source region of both #solarstorms, one from early Sunday Nov 9, and the other from early Monday Nov 10, are (as usual) complex. Judging from the main neutral line, where the +/white, and -/black magnetic fields meet, we may expect a magnetic field rotation as south-east-north (SEN) or ENW.
We are waiting for the arrival of both #solarstorms at the @esa.int #SolarOrbiter spacecraft. Its magnetometer could measure their internal magnetic field which can improve our forecasts. It is a bit away from the Sun-Earth line at 10° north / 18° west but at a good distance of 0.83 au from the ☀️
👇
👇
November 11, 2025 at 9:28 AM
We are waiting for the arrival of both #solarstorms at the @esa.int #SolarOrbiter spacecraft. Its magnetometer could measure their internal magnetic field which can improve our forecasts. It is a bit away from the Sun-Earth line at 10° north / 18° west but at a good distance of 0.83 au from the ☀️
👇
👇
Another #solarstorm is approaching Earth 🌍 It's associated with an X1.2-class solar flare, again from active region AR 14274 (same as the CME predicted to arrive late tomorrow). It has an estimated initial speed of 1208 km/s - expected arrival is Wednesday, November 12th around 02:47 ± 5.67 UTC.
November 10, 2025 at 2:26 PM
Another #solarstorm is approaching Earth 🌍 It's associated with an X1.2-class solar flare, again from active region AR 14274 (same as the CME predicted to arrive late tomorrow). It has an estimated initial speed of 1208 km/s - expected arrival is Wednesday, November 12th around 02:47 ± 5.67 UTC.
A #solarstorm with an initial speed of ~730 km/s is on its way toward Earth! It’s associated with an X1.7-class flare that peaked today around 07:35 UTC.
The CME is expected to arrive Tuesday, 11 November, around 20:00 UTC (21:00 CET).
Let’s hope for a better aurora show than on Friday🤞🌌
The CME is expected to arrive Tuesday, 11 November, around 20:00 UTC (21:00 CET).
Let’s hope for a better aurora show than on Friday🤞🌌
November 9, 2025 at 5:12 PM
A #solarstorm with an initial speed of ~730 km/s is on its way toward Earth! It’s associated with an X1.7-class flare that peaked today around 07:35 UTC.
The CME is expected to arrive Tuesday, 11 November, around 20:00 UTC (21:00 CET).
Let’s hope for a better aurora show than on Friday🤞🌌
The CME is expected to arrive Tuesday, 11 November, around 20:00 UTC (21:00 CET).
Let’s hope for a better aurora show than on Friday🤞🌌
#solarstorm update 💥 - the CME predicted to arrive early Friday, November 7th seems to have impacted L1 around 04:51 UTC today - speed around 793 km/s, Bz initially northward with strength around 13 nT and currently at -7 nT
November 7, 2025 at 8:52 AM
#solarstorm update 💥 - the CME predicted to arrive early Friday, November 7th seems to have impacted L1 around 04:51 UTC today - speed around 793 km/s, Bz initially northward with strength around 13 nT and currently at -7 nT
With a bit of delay we announce also here that at the ml-helio.github.io conference in Madrid our PhD student Hannah T. Rüdisser @hannahruedisser.bsky.social was awarded with the
"ML-Helio Early Career Award" for her contributions to AI based detection of solar storms - congrats!!
"ML-Helio Early Career Award" for her contributions to AI based detection of solar storms - congrats!!
November 7, 2025 at 6:38 AM
With a bit of delay we announce also here that at the ml-helio.github.io conference in Madrid our PhD student Hannah T. Rüdisser @hannahruedisser.bsky.social was awarded with the
"ML-Helio Early Career Award" for her contributions to AI based detection of solar storms - congrats!!
"ML-Helio Early Career Award" for her contributions to AI based detection of solar storms - congrats!!
☀️ Earth is currently experiencing a class G3 geomagnetic storm (likely caused by a #solarstorm flank hit), with Dst values going as low as -136 nT in the last 12 hours. Bz magnetic field component is currently positive, Dst values remain around -110 nT
November 6, 2025 at 10:18 AM
☀️ Earth is currently experiencing a class G3 geomagnetic storm (likely caused by a #solarstorm flank hit), with Dst values going as low as -136 nT in the last 12 hours. Bz magnetic field component is currently positive, Dst values remain around -110 nT
Reposted by Austrian Space Weather Office
A new podcast (in german) is available on all platforms with Hannah Rüdisser @hannahruedisser.bsky.social and me talking about many aspects of space weather, like future @esaspaceweather.esa.int missions, Miyake Events and solar storm impacts on technology.
👇
geosphere.at/de/aktuelles...
👇
geosphere.at/de/aktuelles...
Folge 10: Die stürmische Seite der Sonne
Achtung! Achtung! Das ist eine Sturmwarnung aus dem Weltall! Ganz so wild geht es im Arbeitsalltag der beiden Astrophysiker:innen Christian Möstl und Hannah Rüdisser zwar nicht (immer) zu, aber sie ha...
geosphere.at
November 5, 2025 at 12:36 PM
A new podcast (in german) is available on all platforms with Hannah Rüdisser @hannahruedisser.bsky.social and me talking about many aspects of space weather, like future @esaspaceweather.esa.int missions, Miyake Events and solar storm impacts on technology.
👇
geosphere.at/de/aktuelles...
👇
geosphere.at/de/aktuelles...
Wrap up post after a week at #ESWW2025, full of updates on each and every aspect of #spaceweather, in Umeå Sweden. A very well organized conference, a bit of #aurora too, and great to see many players in such a vibrant and innovative community - on to Florence, Italy, 2026 Nov 2-6! #ESWW2026
October 31, 2025 at 11:53 AM
Wrap up post after a week at #ESWW2025, full of updates on each and every aspect of #spaceweather, in Umeå Sweden. A very well organized conference, a bit of #aurora too, and great to see many players in such a vibrant and innovative community - on to Florence, Italy, 2026 Nov 2-6! #ESWW2026