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The New Madrid Seismic Zone (NMSZ), sometimes called the New Madrid Fault Line, is a major seismic zone and a prolific source of intraplate earthquakes (earthquakes within a tectonic plate) in the Southern and Midwestern United States, stretching to the southwest from New Madrid, Missouri. The New Madrid fault system was responsible for the ...
Data from large earthquakes—in May and July 1909, and November 1968—suggest that earthquakes in the area are of moderate magnitude but can be felt over a large geographical area, largely because of the lack of fault lines. The May 1909 Aurora earthquake affected people in an area of 500,000 sq mi (1,300,000 km 2); [6] the 1968 Illinois ...
Locations of quakes magnitude 2.5 or greater in the Wabash Valley (upper right) and New Madrid (lower left) Seismic Zones. The Wabash Valley Seismic Zone (also known as the Wabash Valley Fault System or Zone) is a tectonic region located in the Midwestern United States, centered on the valley of the Lower Wabash River, along the state line between southeastern Illinois and southwestern Indiana.
A 2.4-magnitude earthquake was recorded Wednesday night about five miles northwest of Keyesport, the United States Geological Survey said. The quake hit at 9:50 p.m. Wednesday and it was about ...
New Madrid fault and earthquake-prone region considered at high risk today. 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 ...
A magnitude 3.6 earthquake rattled northern Illinois and parts of three other states early Wednesday, awakening some residents and spurring reports to 911 about homes shaking, the U.S. Geological ...
Southern Illinois sits upon the verging point of two major fault systems, the New Madrid Seismic Zone and the Wabash Valley Seismic Zone. In the 1970s after the 5.4 Richter magnitude scale 1968 Illinois earthquake, scientists realized that there was an unknown fault under Saline County, just north of Eldorado, Illinois. This fault is called the ...
The red dots show larger-magnitude earthquakes in Minnesota, Wisconsin, Michigan's Upper Peninsula and southern Ontario. The earthquake near Minnesota's western "bulge" is the Morris earthquake. This map and table shows where Minnesota's earthquakes have occurred. Earthquakes 1, 6, 9, 11, 15 and 18 are in the Great Lakes tectonic zone.