A 4.8 magnitude earthquake rocked Yellowstone National Park Sunday morning, the strongest quake to strike the park since 1980.

University of Utah seismographic stations recorded the quake at 6:34 a.m. Sunday morning about 4 miles north-northeast of the Norris Geyser Basin.

The quake was far enough from residential areas to not cause significant damage but border towns in Montana about 20 miles from the epicenter reported significant shaking.  Park rangers say that the park is very sparsely populated during this time of the year.

The USGS reported at least four aftershocks between magnitude 3.1 and 3.3.

Scientists have been watching the caldera of the Yellowstone Super Volcano closely as it has been rising since 2004, however, they said the recent quake is not the sign of an imminent eruption.

The quake comes less than two weeks after residents and reporters began to notice large migrations of bison and other animals away from the park.  One video posted on YouTube March 20^th showed a herd of bison running down a highway as if a predator was chasing them.