Sitting around watching TV a while ago, I felt the chair I was in moving gently from side to side. The 17 year old felt it as well.
Turns out it was a relatively sturdy earth quake about 150 or so miles to the north of us, up in Plumas County. It's the big red square in this map.
California is famous for it's quakes, but they mostly happen along the coast and in Southern California. We don't feel them that much here snuggled up to the foothills of the Sierra Nevada, but that one was apparent, even at that distance. I'll bet stuff was falling off the shelves up near the epicenter.