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The first two in a series of four severe earthquakes struck the Midwestern United States and made the Mississippi River appear to run backward.
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1811–1812 New Madrid earthquakes
Series of earthquakes during 1811–1812 impacting on Missouri, USA
The 1811–1812 New Madrid earthquakes were a series of intense intraplate earthquakes beginning with an initial earthquake of moment magnitude 7.2–8.2 on December 16, 1811, followed by a moment magnitude 7.4 aftershock on the same day. Two additional earthquakes of similar…Source: Wikipedia (CC BY-SA)
Midwestern United States
Census region of the United States
The Midwestern United States is one of the four census regions defined by the United States Census Bureau. It occupies the northern central part of the United States. It was officially named the North Central Region by the U.S. Census Bureau until 1984. It is between the…Source: Wikipedia (CC BY-SA)
Mississippi River
Major river in the United States
The Mississippi River is the primary river of the largest drainage basin in the United States. It is the second-longest river in the United States, behind only the Missouri. From its traditional source of Lake Itasca in northern Minnesota, it flows generally south for 2,340 mi…Source: Wikipedia (CC BY-SA)