A magnitude 7.8 earthquake scenario could play out like this The Great Southern California ShakeOut was officially announced today where millions of Southern Californians will “Drop, Cover, and Hold On” (register at www.ShakeOut.org) as thousands of emergency responders statewide take part in the largest-ever earthquake response drill called "Golden Guardian." The hypothetical magnitude 7.8 earthquake will rupture the San Andreas Fault at 10 a.m. on November 13. "An enormous earthquake is definitely in our......