So turns out it was an earthquake - a 5.4. Have to admit to being a bit unnerved. I was at work and 30 seconds of rolling waves seems like hours! Both stores were/are fine, but my house was another matter. Apparently the epicenter was 5 miles north of Yorba Linda. I live right on the border of Yorba Linda and Anaheim Hills. Yup, there was a lot of shaking going on at my house.
I went home to check on the pets, and the house. A lot of glass every where but thankfully no structural damage that I could find. Pictures off the wall, dresser drawers open and empty, mirrors broken, TVs tipped over, lamps and bulbs shattered, books on the floor, waterford crushed, China cracked.... Thankfully, all just "stuff". Most importantly, pets were fine and didn't seem to be too shaken up.
It'll take a bit to get it all cleaned up, but I am sure lucky. Could have been a lot worse. Phone service was restored a little while ago. I am supposed to have water back by morning, which will be good since I am sweaty and stinky right now from trying to get the garage cleaned up so I can pull my car in!
Thanks to everyone who called, checked up on me and offered to help clean up!