Updated 5:20 a.m. 07/06/17:
Some Montanans were shaken awake at about 12:30 am by an earthquake with an epicenter about six miles south-east of Lincoln.
Randy Baldwin, a geophysicist with the National Earthquake Information Center in Golden, Colorado said, "the magnitude on the quake was a magnitude 5.8, and it occurred at a depth of about 13 kilometers, which is a little over 6 miles."