I don't want to be in this building when there's an earthquake! It's condemned and not structurally sound. So when I felt this, all I did was think "please stop please stop"! A light earthquake occurred at 7:47:59 AM (PDT) on Tuesday, September 4, 2007. The magnitude 4.0 event occurred 12 km (7 miles) SW of La Jolla, CA. The hypocentral depth is 9 km ( 6 miles).