Thursday's Idaho earthquake felt in Utah & Wyoming. The quake happened around 8:30 and was only about 4.3 in magnitude. Some were shaken, but not stirred.
On August 17, 1959 an earthquake measured 7.3-7.5 on the Richter scale at Yellowstone National Park. The tragic event caused over 28 deaths and $11 million in damage between Wyoming and Montana communities.