A CME impact revved-up a minor geomagnetic storm already in progress causing aurora to spill into the northern tier states of the U.S. on Feb. 19, 2014.
A minor geomagnetic storm was already in progress on Feb. 19, 2014, when a coronal mass ejection, or CME, struck Earth’s magnetic field. The CME impact revved-up the storm, producing brilliant aurora over both poles, which spilled into the northern tier states of the U.S.
This photograph is courtesy of Jonathan taken on February 19, 2014, near Grand Forks, North Dakota.