Wyoming has been the site of several major earthquakes. In 1959, a powerful 7.2 magnitude quake rocked Yellowstone. That was one of six earthquakes over 6.0 to strike the area within the last 100 years.

Other parts of the state have also experienced seismic activity. In 1984, a 5.3 magnitude quake shook Douglas. Two weeks later, a 5.0 magnitude earthquake hit Lander. Earlier that same year, Gillette experienced a 5.0 quake.