Changing Maps

A state geologist tips Johnson off to a controversy over the state maps designating seismic hazard zones. An initial effort to map fault and liquefaction zones across the state was hindered by pressure from property owners and real estate agents protesting stricter -- and more expensive -- construction requirements. The seismic hazard zones were pulled back over the years. But does changing the maps change the danger? Learn more at http://californiawatch.org/earthquakes.