On Tuesday, September 1, at 8:00 p.m. CDT, NOVA science NOW will air “Earthquakes in the Midwest.” In this special episode, experts will take us back to the three most powerful earthquakes to strike the American Midwest in order to explain how and why earthquakes occur in the heartland. Geologists will also uncover important geological patterns that can reveal the region’s potential for another series of earthquakes. For more information on the NOVA episode, visit – http://www.pbs.org/wgbh/2009nova/sciencenow/