West Yellowstone Montana / Light shaking (MMI IV) / complex rolling (tilting in multiple directions) / 2-5 s : It felt like a rolling or ripple type motion with two distinct ripples to it within a span of 2-3 seconds. Slight building creaking sound at the same time. | 5 users found this interesting.
Madison campground / Weak shaking (MMI III) / 2-5 s : Thought an animal was shaking our motor home, jumped up and looked out all the windows and nothing was there | 2 users found this interesting.
Yellowstone National t (16.2 km SSW of epicenter) [Map] / Light shaking (MMI IV) / vibration and rolling
West Yellowstone, MT / Weak shaking (MMI III) / simple rolling (tilting sideways along one direction) / 10-15 s : It felt like a sideways rolling action, and repeated twice. A gentle, rocking movement.
Island Park idaho / Very weak shaking (MMI II) / single lateral shake / 2-5 s (reported through our app)