It's 4:18 in the afternoon in Oakland, California. Deep below the city, the Hayward Fault -- one of the most active fault lines in the country -- suddenly slips, setting off a magnitude-7.0 earthquake. read more
Here's what a hypothetical magnitude 8.2 earthquake would look like in Southern California -- a quake that begins near the Mexican border and moves north and west through L.A. County into central California. read more