Catastrophic earthquakes: How big does a quake really need to be? Doomsday Scenarios, ep. 4

For someone who studies earthquakes, what are the scariest places in the world? How big does an earthquake have to be before it has societal impacts? Where in the United States are we most at risk for serious earthquakes? And could a big quake ever hit the Philadelphia area? This episode of KYW Newsradio In Depth is part four of a mini series called Doomsday Scenarios, where we ask very smart people if this, that, or the other thing could destroy life as we know it, and learn some of the science behind how the world works along the way. Today we caught up with Dr. Nick Davatzes, Associate Professor & Chair of the Earth and Environmental Science at Temple University's College of Science and Technology to talk about earthquakes.