We've had a few small ones here in Utah. Supposed to have a huge one someday. The biggest one was years ago..light fixtures moving..I was on the couch, felt it. Ran around to see if family ft it. Everyone did. Kids were scared.They've been working on a warning system for years. 30 seconds might help if you were in a dangerous spot, like near the chimney. You don't want to be near falling bricks.
The whole house shook. Little bit of rattling of things and you could hear the rumbling, but it was mild and short so no problems.