Get ready for auroras

Sky watchers in Europe and North America might see auroras tonight (June 4-5) if, as expected, a Cannibal CME strikes Earth. The impact could spark strong (G3) geomagnetic storms with isolated periods of severe (G4) activity. During similar storms in the past, naked-eye auroras have been visible in more than 25 US states. Pro tip: Get away from city lights!

Source: https://www.spaceweather.com/