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New Madrid Earthquakes 1811-1812
Background about the 1811-1812 New Madrid earthquakes in the Midwest. "On the basis of the large area of damage ... the widespread area of perceptibility ... and the complex physiographic changes that occurred, the Mississippi River valley earthquakes of 1811-1812 rank as some of the largest in the United States since its settlement by Europeans." Includes an earthquake summary, subsequent historical images, eyewitness accounts, and maps. From the U.S. Geological Survey (USGS).
http://earthquake.usgs.gov/regional/states/events/1811-1812.php
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