The New Madrid Seismic Zone | U.S. Geological Survey - USGS.gov
Paleoseismic studies concluded that the New Madrid seismic zone generated magnitude 7 to 8 earthquakes about every 500 years during the past 1,200 years.
New Madrid seismic zone - Wikipedia
Earthquakes that occur in the New Madrid seismic zone potentially threaten parts of seven American states: Illinois, Missouri, Arkansas, Kentucky, Tennessee, and to a lesser extent Mississippi and Indiana.
Summary of 1811-1812 New Madrid Earthquakes Sequence
In total, Otto Nuttli reported more than 200 moderate to large aftershocks in the New Madrid region between December 16, 1811, and March 15, 1812: ten of these were greater than about 6.0; about one hundred were between M5.0 and 5.9; and eighty-nine were in …
About the New Madrid Seismic Zone - Illinois
The zone is active, averaging about 200 earthquakes per year, though most of them are too small to be felt. With modern seismic networks, the capability to detect earthquakes has greatly increased, and many more very small earthquakes are being detected now than in the past.
Wagon loads of sand blows in White County, Illinois
Abstract. Several anecdotal accounts provide compelling evidence that liquefaction occurred at several sites in Illinois during the 1811-1812 New Madrid sequence, as much as 250 km north of the New Madrid seismic zone (NMSZ).
Evidence of contemporary and ancient excess fluid pressure in the New …
Jan 1, 1994 · In 1990, the New Madrid seismic zone/central United States became the first seismically active region east of the Rocky Mountains to be designated a priority research area within the National Earthquake Hazards Reduction Program (NEHRP).
New Madrid Seismic Zone Earthquake Hazard Article and Map - Geology.com
The geologic record of repeated large earthquakes, the historical accounts of the 1811-12 large earthquakes, and the continuing earthquake activity in the area are compelling evidence that the New Madrid region has high earthquake hazard.
Analysing the 1811–1812 New Madrid earthquakes with recent
May 20, 2004 · We infer that the remaining New Madrid mainshock may have occurred more than 200 km north of this region in the Wabash Valley of southern Indiana and Illinois—an area that contains abundant...
New Madrid Seismic Zone - ILSTRUC - isgswikis.web.illinois.edu
The complete zone of intense activity is the New Madrid Seismic Zone. Away from the New Madrid Zone epicenters are scattered in a seemingly random pattern across a large area, which includes approximately the southern one-third of Illinois.
Earthquake Hazard in the Heart of the Homeland
In fact, one of the largest historical earthquakes to strike the continental United States occurred in the winter of 1811-1812 along the New Madrid seismic zone, which stretches from just west of Memphis, Tennessee, into southern Illinois.