"This green corona lit up the night sky sky over the weekend," reports photographer Fredrik Broms of Kvaløya, Norway. "It was absolutely breathtaking--and the best may be yet to come!"
He's right. A coronal mass ejection (CME) is heading toward Earth and it could spark strong geomagnetic activity when it arrives on March 17th or 18th. High-latitude sky watchers should be alert for auroras.