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am_Unition · 3727 days ago · link · · parent · post: Major X-Class Solar Flare, Prepare For Auroral Activity
Update: my prediction time was far too late, as the CME has just swept past the ACE spacecraft about 2 hours ago (~1530 UTC, 9/12/2014). Really great to watch this unfold in real-time on that aggregated data site, solarham.com. Definitely the strongest event I've ever caught "live". Expect some nice Aurora tonight, especially in Northern Europe and northeast to north-central North America. Hopefully they're still around by the time Alaska rotates past the terminator line.