Yellowstone National ... The park's largest recorded earthquake, a magnitude 6, occurred on June 30, 1975, along the north-central boundary of Yellowstone Caldera, a few miles southeast of Norris ...
Yellowstone National Park's oldest and hottest geothermal ... damaging earthquakes have also struck the area. The park's largest recorded earthquake, a magnitude 6, occurred on June 30, 1975, along ...