YELLOWSTONE NATIONAL PARK, Wyo. — The University of Utah's seismograph stations reported a swarm of small earthquakes in Yellowstone National Park.
The university said the quakes of magnitude 3.5 and lower have been occurring beneath Yellowstone Lake, five to nine miles south-southeast of Fishing Bridge, a park landmark. The earthquakes that began on Friday and continued on Saturday intensified during the weekend, and there were reports that people in the Yellowstone Lake area felt the quakes.
The University of Utah says they've been in an area of the park where quake swarms are common.