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New Madrid
Introduction References & Edit History Related Topics
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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
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Tower Bridge over the Thames River in London, England. Opened in 1894. Remains an Important Traffic Route with 40,000 Crossings Every Day.
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New Madrid: References & Edit History

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  • The Editors of Encyclopaedia Britannica
    Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.

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Article History

Type Description Contributor Date
Population data updated. Jul 27, 2011
Map of the New Madrid earthquakes of 1811 and 1812 added. Jul 22, 2010
Added new Web site: Official Site of New Madrid, Missouri, United States. Jan 03, 2008
Article revised and updated. Aug 02, 2006
Article added to new online database. Jul 20, 1998
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