What’s That Rattling?

I awoke early this morning to a strange rattling sound in my bedroom. The double doors were closed but the one without the top-side deadbolt was moving back and forth just a little bit. I got up and walked over to the door and thought it might’ve been a window that popped open somewhere thereby affecting the air flow in the room but all windows were closed. On the way in to work this morning I heard NPR report that there was an earthquake somewhere in the midwest and damn, I actually saw it affecting my house!

I thought I left earthquakes behind when I left California.