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Christian Möstl
@chrisoutofspace.bsky.social
Heliophysicist | Head, Austrian Space Weather Office | GeoSphere Austria |☀️💥💨🌍 | ERC HELIO4CAST | helioforecast.space | he / him
114 followers160 following30 posts
Reposted by Christian Möstl
APapod.shinyakato.dev

Northern Lights from the Stratosphere - ©Ralf Rohner - PhotoHD PhotoAbout NASA Astronomy Picture Of the Day#apod#science#astronomy#astrophotos#🔭@shinyakato.dev 🧵 READ MORE 🧵

Northern lights shine in this night skyview from planet Earth's stratosphere, captured on January 15. The single, 5 second exposure was made with a hand-held camera on board an aircraft above Winnipeg, Canada. During the exposure, terrestrial lights below leave colorful trails along the direction of motion of the speeding aircraft. Above the more distant horizon, energetic particles accelerated along Earth's magnetic field at the planet's polar regions excite atomic oxygen to create the shimmering display of Aurora Borealis. The aurora's characteristic greenish hue is generated at altitudes of 100-300 kilometers and red at even higher altitudes and lower atmospheric densities. The luminous glow of faint stars along the plane of our Milky Way galaxy arcs through the night, while the Andromeda galaxy extends this northern skyview to extragalactic space. A diffuse hint of Andromeda, the closest large spiral to the Milky Way, can just be seen to the upper left.
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Our team at the Austrian Space Weather Office will be at the @eurogeosciences.bsky.social#solarstorms and AI applications. Abstracts are due January 10 💀

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And of course the STEREO-A spacecraft could give us hints too on the structures that we will see and their geoeffective potential. Earth is neatly "wrapped" at 6° west by STEREO-A and 10° east by Solar Orbiter for this event.

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Eva Weiler from our Austrian Space Weather Office at the GeoSphere Austria has made a forecast with the ELEvo model of an arrival time Fr Dec 1 07:33Z (-14.3h, +14.3h).

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If it has decelerated from its initial speed of roughly 800 km/s, it should take (very roughly) around half a day from Solar Orbiter to Earth. So far though we don't understand well how the magnetic fields at this distance from Earth are correlated with Earth observations!

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The magnetic field instrument on @ESASolarOrbiter @SolarOrbiterMAG may measure this storm and tell us if it has southward pointing magnetic fields, at 10° east of Earth and 0.84 AU. This may help in forecasting whether this storm is capable to produce #aurora at low latitudes.

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As most #spaceweather#solarstorm incoming, erupting on late Tue Nov 28, visible as a halo around the Sun in this @MissionSoho LASCO image. There is a wide spread in predicted Earth arrivals from early to late Fr Dec 1.

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CMchrisoutofspace.bsky.social

More ERC grants for Graz, congrats!

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This seems to be a real game changer. I do wonder what this means for #spaceweatherwww.wired.com/story/google...

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No, we can look at the data from STEREO-A and if we are lucky, Solar Orbiter, if it observes the CME, but these are not included in any automated models. In March 2022/2023 we have used these data for real time predictions for singular CME events, a paper should be hopefully published soon.

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Christian Möstl
@chrisoutofspace.bsky.social
Heliophysicist | Head, Austrian Space Weather Office | GeoSphere Austria |☀️💥💨🌍 | ERC HELIO4CAST | helioforecast.space | he / him
114 followers160 following30 posts