Seismologists have said time and time again that they can't predict the exact day or time of an earthquake. Yes, it could happen anytime along any of the multitude of fault lines in California. You're better off watching your dog's or farm animals' behavior. They are literally sensitive to advance waves of a quake!
You can download the USGS earthquake .kmz file which allows you to see all earthquake locations in Google Earth. It's very cool!
Edited 1 time(s). Last edit at 01/27/2012 02:28PM by Paul P..