We Just Had an Earthquake!

We just had an earthquake here in the Bay Area. It was a magnitude 4.2 according to the USGS. An aftershock struck a few minutes ago as well. Items in my house fell over and pictures on the wall have been put off center. This is the biggest earthquake we've had in a while, and just more proof that California really is on shaky ground. What a great way to start off the month...