A magnitude 4.8 earthquake rattled Yellowstone National Park on Sunday - the biggest shake recorded in the area since February 1980.
No injuries were reported at the park, which is situated upon one of the biggest super-volcanoes in the world.
According to a report by Reuters, no damage was done to the park.
The northwest area of the park was hit the hardest by the quake - largely regarded as a small tremor by officials who spoke with Reuters. This earthquake was one of a few other, smaller shakes that struck the park last Thursday.
According to a statement released by geologists at the University of Utah Seismograph Stations, the earthquake hit Yellowstone at about 6:34 a.m., close to the Norris Geyser Basin. Reuters reported that residents of a small Montana town felt the earthquake about 23 miles away.
Yellowstone sees between 1,000 and 3,000 earthquakes annually, the Yellowstone Volcano Observatory reported this weekend.
The caldera, a centuries-old super-volcano underneath the park was first found by researchers years ago. But only recently did scientists discover that the volcano was at like two times larger than experts had originally reported.
University of Utah seismologists told Reuters that the earthquake on Sunday happened close an area officials have been studying for months.
