at 7:16 am it must be an earthquake.
The walls rumbled and the whole bed shook. B and I felt it, but the boys didn't. Nothing fell off the walls or anything. The town where it was apparently located (Wells, Nevada) had a lot of damage though.
There was a second, smaller one about 7:35 which we didn't feel at all.
We live near a municipal airport where they also have some military buildings, so they fly Apache helicopters quite often. When they come in low, all the glass things on shelves rattle a little. So when the whole bed shook, I knew it wasn't an Apache, which are quite loud and I can hear them coming.