I was in Yellowstone National Park the night the earthquake occurred. This is also known as the Yellowstone earthquake. The epicenter was just across the border in Montana. It was a night of shake, rattle, and roll. But I was a kid and I thought it was great fun. There were smaller after-shocks.
We continued our sight-seeing trip the next day, but we also got to see some of the damage. What I remember is that some of the roads were blocked off because of landslides or big cracks in the earth. But the geysers kept on shooting out hot water. And the moose and bears were still roaming around.
I can imagine how it felt. I went through a 6.2 in New Brunswick, Canada in 1982. Knocked me off my feet at the university.