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
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!
On Saturday Nov 15 this #solarstorm arrived at STEREO-A, as seen in the magnetic field in the 2nd panel here, 49° west of Earth. This one caused only a minor signature at Earth. At STEREO-A the magnetic field was even stronger than last weeks storm near 🌍, with 76 nT total field and -57 nT Bz!
November 17, 2025 at 8:37 AM
On Saturday Nov 15 this #solarstorm arrived at STEREO-A, as seen in the magnetic field in the 2nd panel here, 49° west of Earth. This one caused only a minor signature at Earth. At STEREO-A the magnetic field was even stronger than last weeks storm near 🌍, with 76 nT total field and -57 nT Bz!
An ELEvo run is already available, this storm with the X4 flare had an initial speed of about 1500 km/s and direction of 62° west.
November 14, 2025 at 3:35 PM
An ELEvo run is already available, this storm with the X4 flare had an initial speed of about 1500 km/s and direction of 62° west.
The Nov 14 2025 storm will travel towards the STEREO-A spacecraft by the way, which is currently 50° west of Earth, and possibly Solar Orbiter will get a glimpse of it at 17° west, and Earth maybe too (but much less than earlier this week).
November 14, 2025 at 3:27 PM
The Nov 14 2025 storm will travel towards the STEREO-A spacecraft by the way, which is currently 50° west of Earth, and possibly Solar Orbiter will get a glimpse of it at 17° west, and Earth maybe too (but much less than earlier this week).
Notice the direction of this storm? The source is at about 60° west of Earth. This means that this is how the @esa.int #Vigil spacecraft (2031-) would image an Earth directed #solarstorm from the L5 point, as L5 is 60° behind the Earth's orbit.
November 14, 2025 at 3:27 PM
Notice the direction of this storm? The source is at about 60° west of Earth. This means that this is how the @esa.int #Vigil spacecraft (2031-) would image an Earth directed #solarstorm from the L5 point, as L5 is 60° behind the Earth's orbit.
Then the coronagraph images by SOHO/LASCO -
November 14, 2025 at 3:27 PM
Then the coronagraph images by SOHO/LASCO -
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.
Note also that the ECMWF maps do show some more high cloud cover in central Europe.
November 12, 2025 at 8:34 PM
Note also that the ECMWF maps do show some more high cloud cover in central Europe.
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.
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
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.
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🤞🌌
Update: Looks like we are in a magnetic obstacle, speed remains at high values (830 km/s). Total magnetic field strength not overwhelming and currently at 12 nT, Dst at -34 nT. However, Bz turning southward now, so fingers crossed, fellow aurora chasers! 🤞💫
November 7, 2025 at 2:50 PM
Update: Looks like we are in a magnetic obstacle, speed remains at high values (830 km/s). Total magnetic field strength not overwhelming and currently at 12 nT, Dst at -34 nT. However, Bz turning southward now, so fingers crossed, fellow aurora chasers! 🤞💫
#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