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The reason behind the New Madrid Fault's activity differs from tectonic processes that create earthquakes in regions like California. Located rather than on the edge but in the center of the North American plate, the fault’s seismic events arise from internal pressures and stresses within the continental crust.
Geological studies indicate that intraplate earthquakes can occur due to shifting stress loads that affect even the most stable continental plates. The New Madrid Fault zone is characterized by sedimentary rock layers that can amplify seismic waves, resulting in increased damage and extended reach of tremors.