i am reluctant to post this seeing as how a friend lives in or near LA but Newfound L.A. Fault Threatens Major Quake, (qoute) Known as the Puente Hills Blind Thrust System, the fault is three to 17 kilometers (2 to 11 miles) deep and extends for almost 50 kilometers (31 miles) from northern Orange County, through Los Angeles, up to Beverly Hills.(/quote) unlike most faults this does mot extend to the surface.....interesting article...if you don't live in the LA area....