If your sky is clear and you live in the northern U.S. take a look outside tonight. The aurora is active again for the third night in a row. For the second night in a row, skies are cloudy in Duluth otherwise I’d be outside myself. The auroral oval map indicates that northern lights currently reach across southern Ontario and into northern Minnesota. This instance of aurora is caused by a coronal mass ejection (CME) released by the sun on April 23.
Cloudy by you too? There’s another chance for auroras Thursday night before things quiet down for the weekend.