California has such a fixation with faults, yet none of the more recent larger earthquakes zoom along mapped faults. They always find the fault after the fact. In fact, I would almost propose the working hypothesis that California earthquakes hate dusty old faults, or perhaps there is some quantum effect? :)
This survey is steeped in politics. They just want a delay to get away from Japan-panic. If they are going to do it, at least send out fishie-ships to see if there really is any effect. Most of the seismic survey panic is based on internet myth.