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Aurora achieves exascale! The Aurora supercomputer at Argonne, built in partnership with Intel and HPE, has officially surpassed the exascale threshold, measuring over a quintillion calculations per second on the new Top500 list -

25,831 次观看 • 2 年前 •via X (Twitter)

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🚨 Aurora Alert! 🚨 Hey everyone, a Coronal Mass Ejection (CME) from the Sun is heading our way, potentially sparking strong aurora displays tonight into tomorrow (Nov 7-8). NOAA predicts arrival of the CME around midnight UTC on Nov 7, but add +/- 7 hours for uncertainty. The CME we are concerned with specifically launched due to an M7.4 CME produced by AR 4274. In coronagraph imagery, a full halo eruption iswasclearly seen. This is how we know this particular eruption is coming at us. When it will hit and how strong it will be are not things we can predict until we see the shockwave detected by satellites close to Earth (ACE, DSCOVR at the L1 point). The forecast shows possible G3 storming, and there are multiple CMEs on the way besides the main arrival around midnight on Nov 7. There is also a coronal hole that may enhance and add additional complexity to the situation, affecting arrival times of the CME(s). Conditions need to align for the best-case scenario to play out. The CME needs to hit (most models have a high % chance of this happening, but you never know), and the Bz needs to be southward for some time for conditions to ramp up. The auroral ovals may expand to lower latitudes, and chasers above the 45th parallel may see auroras all night long. During substorms, the aurora "explodes" across the sky and becomes bright and tall. These explosive bursts push the northern lights higher in the sky, making them appear further equatorward. Download my free e-book and check my blog for substorm info: E-book: Substorms: Your aurora apps will likely not tell you when a substorm is occuring, but these times are VERY important since we have a full moon. Without a substorm, you may not be able to see the aurora well. To track substorm activity, I use the GOES magnetometers. I have a tutorial about how to use these data on my website: . A few aurora apps/websites may help you track substorms. For example, the Glendale App issues alerts when substorms are occuring: . This app has a bit of a steeper learning curve compared to others, but it provides useful alerts for catching brief intensifications of aurora. I also like Norlys ( and Aurora Notice ( Webcams are probably the MOST helpful resources, though. I have a large list of cameras all around the world and the northern U.S. on my website: . If you see the aurora on a webcam near you, it is out at your location, too. The Maine webcam in particular is great to get a "feel" for how aurora might shape up across the Lower 48. I always have that one pulled up as sun sets on the east coast to see if aurora can immediately be seen on the northern horizon. Keep following for more updates on this event. I am at a workshop today until 5 pm MST then traveling back to Calgary on my way to the Aurora Summit, so be patient with my updates. I am working as fast as I can :) Thanks!

Vincent Ledvina

24,437 次观看 • 10 个月前