On Tuesday, April 22, an earthquake rumbled beneath the Lincoln, Montana area, and was felt as far away as Great Falls and Butte.

Director of Earthquake Studies at the Montana Bureau of Mines and Geology in Butte, Mike Stickney, said the earthquake was relatively minor in size and scope.

"The earthquake occurred at 8:41 a.m. and it was centered about four miles southeast of Lincoln," Stickney said. "It was a magnitude 3.5 earthquake, and a few people in the region did, in fact feel it. The Lincoln area has been seismically active for as long as we've been monitoring this region in the 1980's. There was a larger earthquake in the same general area that reached a 3.9 magnitude, and so this event certainly has a precedent."

Stickney said the temblor offered one unusual factor.

"So far, if there's anything unusual about this earthquake, it's that we have not seen one single, solitary aftershock," Stickney said.

There was a small earthquake on Wednesday in Yellowstone park that registered a magnitude 1.6. No damage was reported from Tuesday's earthquake near Lincoln.

Director of Earthquake Studies at the Montana Bureau of Mines and Geology in Butte, Mike Stickney