If it hits as night falls in the U.S. on Monday, aurora could be visible as far south as Iowa and Pennsylvania. If it arrives earlier, northern Europe could see the display.

The Northern Lights may be visible in several continental U.S. states Monday night after a strong solar flare caused solar eruptions over the weekend, which are expected to cause some aurora sightings in northern and Midwestern states.

Missed the fun? There’s still great space spotting Tuesday night, with the full harvest blood eclipse supermoon.