A suspicious glow in the north tonight proved to be aurora. Right now activity is moderately high – the solar wind has tipped south – and a soft, very diffuse green aurora covers up to 1/3 of the northern sky. Nothing to write home about … yet.
I watched for about 45 minutes from just north of Duluth, Minn. and never saw a ray, but the dawn-like glow was and still is obvious. The auroral oval map indicates this display could be visible as far south as northern Iowa as of 1 a.m. this Saturday morning.
I wanted to post this alert for aurora-watchers in case the show cranks up before dawn.