Friday's 5.1 earthquake was not on the San Andreas fault, where the so-called "big one" is expected to occur, but on the Puente Hills thrust fault
Friday's 5.1 earthquake was not on the San Andreas fault, where the so-called "big one" is expected to occur, but on the Puente Hills thrust fault. A major quake on that fault could rock the most densely populated areas of Los Angeles. Ben Tracy reports.
