America's Heartland rocked by earthquake felt in several US states
A 3.9 magnitude earthquake at Yellowstone raises concerns over supervolcano activity, but experts affirm it is typical and not indicative of imminent eruption.
America's Heartland rocked by earthquake felt in several US states
A 3.9 magnitude earthquake at Yellowstone raises concerns over supervolcano activity, but experts affirm it is typical and not indicative of imminent eruption.