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Starting a new #Aurora thread for today (Saturday May 11).

Yesterday NOAA's predictions missed both the size and timing of the solar storm, with activity starting earlier and getting stronger than expected. (In fact, maxing out both scales they use.)

As of this morning NOAA has 21 hours of recorded high activity, all in the G4/G5 range. (The scale only goes to G5.)

> https://www.swpc.noaa.gov/communities/aurora-dashboard-experimental

Here are the recorded levels as of 16:00 UTC and predictions as of 12:30 UTC today:

[contd]