More than 100 earthquakes have shaken Yellowstone National Park since last Tuesday, with the strongest, a tremblor of 3.6 magnitude, felt Sunday, according to the University of Utah Semisograph Stations.
The quake occurred at 9:53:02 a.m. Sunday; the epicenter of the shock was located in Yellowstone's Lower Geyser Basin area, 8 miles north of Old Faithful, and 15 miles southeast of West Yellowstone.
According to the seismograph station, the swarm began September 10 and has included quakes near Lewis Lake, the Lower Geyser Basin, and in an area northwest of Norris Geyser Basin.
"A total of 130 earthquakes of magnitude 0.6 to 3.6 have occurred in these three areas, however, most have occurred near the Lower Geyser Basin," park officials reported. "Notably, much of the seismicity in Yellowstone occurs as swarms. The University of Utah Seismograph Stations continues to monitor Yellowstone earthquakes and will provide additional information if the earthquake swarm activity increases."