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The greatest earthquake risk east of the Rocky Mountains is along the New Madrid fault system. Damaging earthquakes are much less frequent than in California, but when they do occur, the damage can be far greater, due to the underlying geology.
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www.ceri.memphis.edu/aware/nmsz.html
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Articles, maps, and information on the New Madrid Fault Zone or System and the Great New Madrid Earthquakes of 1811-1812, as well as recent seismic activity. ... The New Madrid Fault Zone (NMFZ)
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quake.ualr.edu/public/nmfz.htm
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THE NEW MADRID FAULT SYSTEM EXTENDS 120 MILES SOUTHWARD from the area of Charleston, Missouri, and Cairo, Illinois, through New Madrid and Caruthersville, following Interstate 55 to Blytheville and on down to Marked Tree, Arkansas.
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www.scchealth.org/docs/ems/docs/prepare/newMadrid.html
www.scchealth.org/docs/ems/docs/prepare/newMadrid.html
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Information, links and eye witness accounts concerning the New Madrid Fault zone ... The granddaddy of them all was the 1811-1812 series of three great quakes on the New Madrid Fault (halfway between St. Louis and Memphis beneath the Mississippi), which shook the entire United States.
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hsv.com/genlintr/newmadrd/
hsv.com/genlintr/newmadrd/
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Haydar Al-Shukri, the director of the Arkansas Earthquake Center at the University of Arkansas at Little Rock, said the fault is separate from the New Madrid fault responsible for a series of quakes in 1811-12 that caused the Mississippi River to flow backward.
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www.greatdreams.com/madrid.htm
www.greatdreams.com/madrid.htm
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The New Madrid fault, one of many faults in the central United States, is not nearly as visibly active as those in California, but when a big earthquake hits, the New Madrid fault may cause more damage over a greater area then those in California ("Earthquakes").
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www.earlham.edu/~hoeyhe/geology/webpage.htm
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Three earthquakes from the New Madrid fault hit the United States during the years 1811 and 1812. These earthquakes are considered some of the largest earthquakes the United States has ever known ("Largest..."). They are estimated to have had a magnitude of 8.0 or higher.
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www.earlham.edu/~hoeyhe/geology/History.htm
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The 400 terrified residents in the town of New Madrid (Missouri) were abruptly awakened by violent shaking and a tremendous roar. It was December 16, 1811, and a powerful earthquake had just struck. This was the first of three magnitude-8 earthquakes and thousands of aftershocks to rock the region that winter.
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quake.wr.usgs.gov/prepare/factsheets/NewMadrid/
quake.wr.usgs.gov/prepare/factsheets/NewMadrid/
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