Which seismic zone triggered the 2010 Indiana earthquake?
New Madrid Seismic Zone The New Madrid Seismic Zone (pronounced ), sometimes called the New Madrid Fault Line, is a major seismic zone and a prolific source of intraplate earthquakes (earthquakes within a tectonic plate) in the southern and midwestern United States, stretching to the southwest from New Madrid, Missouri.
Norman Upland The Norman Upland of southern Indiana comprises hilly terrain caused by the outcropping of sandstone units at the surface. The Norman Upland is the result of the exposure of the ancient Borden deltaic complex, which includes the Borden Formation. The age of the rocks in the Norman Upland are Mississippian.