This map shows historical earthquakes of Illinois (magnitude 4.5 or greater) from 1804 to 1987.
Stover, Carl W., and Coffman, Jerry L. 1992, Seismicity of the United States, 1568-1989 (Revised). Denver, CO. United States Geological Survey Professional Paper 1527.
This map shows the fault systems of Illinois and neighboring states.
Nelson, W. John. 1995, Structural Features In Illinois. Illinois State Geological Survey, Bulletin 100.
For a map showing earthquake locations along the New Madrid fault system in Illinois and neighboring states, visit:
New Madrid Earthquakes 1975-1995. (n.d.).
Updated 10/27/10 SLD