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New Madrid earthquakes of 1811–12
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Map showing the extent of perceived shaking from the New Madrid earthquakes of 1811-1812 in the central United States. Concentric colored zones indicate areas of extreme, violent, severe, very strong, strong, and moderate shaking, radiating outward from the epicenters near New Madrid, Missouri. An inset highlights the epicenter locations along the Mississippi River near New Madrid, with nearby cities such as Memphis and Cairo also marked. Major cities and state boundaries are included for refere
A woman sits at a table with tools for a scientific demonstration.
New Madrid earthquake damage: landslide Reelfoot Lake New Madrid earthquake damage: tree roots
The video thumbnail image shows a woman trying to break a bundle of pasta strands as part of a scientific demonstration.
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Warm water fuels Hurricane Katrina. This image depicts a 3-day average of actual dea surface temperatures for the Caribbean Sea and Atlantic Ocean, from August 25-27, 2005.
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New Madrid earthquakes of 1811–12: Media

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How Do Earthquakes Affect People? Liquefaction
Sometimes science is about playing in the sandbox.
Video: Encyclopædia Britannica, Inc.
How earthquakes are measured: Demonstrating magnitude
We're picking up earthquake vibrations.
Video: Encyclopædia Britannica, Inc.

Images

New Madrid earthquakes of 1811–12
The earthquakes were some of the largest in U.S. history.
Encyclopædia Britannica, Inc./Kenny Chmielewski
New Madrid earthquake damage: landslide
Landslide trench and ridge in the Chickasaw Bluffs east of Reelfoot Lake, Tennessee,...
U.S. Geological Survey
Reelfoot Lake
Reelfoot Lake, near Tiptonville, Tennessee.
Jeremy Atherton
New Madrid earthquake damage: tree roots
Tree with a double set of roots, formed in the aftermath of the New Madrid earthquakes...
U.S. Geological Survey
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