New Map Shows Historic Growth of Oklahoma Earthquakes

A new federal map released Monday shows parts of Oklahoma are now as seismic as parts of California and Alaska, long the nation's leaders in earthquakes, and for the first time includes man-made earthquakes.

The U.S. Geological Survey's new earthquakes hazard map, which helps states and government officials determine insurance rates and building codes, is in part a reaction to the historic increase in seismic activity in Oklahoma.