“Towns or cities near the epicentre where the quake might have been felt as very weak shaking include Mammoth (population 300) located 22 miles from the epicentre, Gardiner (population 900) 25 miles away, Corwin Springs (population 100) 26 miles away, and Island Park (population 300) 29 miles away.”
Every year, as many as 3,000 earthquakes hit the Yellowstone area, although most go unnoticed.
According to the US National Park Service, which oversees Yellowstone National Park, many of these quakes tend to strike in swarms.
One such swarm in 1985 saw 3,000 earthquakes unfold over three months in the park’s northwest side.
However, none of this is an indicator of future volcanic activity at the supervolcano.
source: express.co.uk