Unsettled geomagnetic activity could bring northern lights to parts of the U.S. tonight (June 19–20). A coronal mass ejection (CME) released during a relatively small C5.5 solar flare on June 17 may deliver a glancing blow to Earth sometime tonight.

Tonight, a stunning cosmic event may take place across parts of the United States. As the Space Weather Prediction Center (SWPC) warns of unsettled geomagnetic activity, the northern lights could be visible as far south as Michigan,

The northern lights — also called aurora borealis — could be visible in Alaska, Washington, Montana, North Dakota, Minnesota, Michigan, Maine, northern parts of Idaho, Wyoming, Iowa, New York, Vermont and New Hampshire.