Drop, Cover, and Hold On. That's what emergency management officials want everyone to do for the Great Central U.S. ShakeOut. That’s scheduled October 17th at 10:17 a.m. to bring awareness about earthquake preparedness. Illinois sits between two active seismic zones: the New Madrid Seismic Zone and the Wabash Valley Seismic Zone. On September 30th, the United States Geological Survey reports seven earthquakes occurred in one day.