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.

Tuesday’s auroral forecast follows “minor” geomagnetic storms that disrupted Earth’s magnetic field over the last two days, increasing the Kp index to around four and boosting a chance to see the northern lights in Maine, South Dakota, New York, New Hampshire and Vermont.

The northern lights are predicted to be visible from several locations across the United States on Tuesday, June 17