Search results
Results from the WOW.Com Content Network
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 ...
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.
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.
The New Madrid Fault Zone is named for the city of New Madrid in the Bootheel. This fault zone is entirely hidden beneath the deep alluvial deposits of the Mississippi embayment. Unlike the San Andreas Fault in California, it is not visible anywhere. This fault zone was responsible for an extremely powerful series of earthquakes that rocked the ...
Pressure on the fault where the 1811–1812 Madrid earthquakes occurred was believed to be increasing, [23] but a later study by Eric Calais of Purdue University and other experts concluded the land adjacent to the New Madrid fault was moving less than 0.2 mm (0.0079 in) a year, increasing the span between expected earthquakes on the fault to ...
Marked Tree is a city in Poinsett County, Arkansas, United States, along the St. Francis River, at the mouth of the Little River. The population was 2,286 at the 2020 census. It is included in the Jonesboro, Arkansas, metropolitan statistical area. Geologically, the area marks the southern end of the New Madrid Fault. [citation needed]
An intraplate earthquake is an earthquake that occurs in the interior of a tectonic plate, in contrast to an interplate earthquake on the boundary of a tectonic plate. It is also called an intraslab earthquake, especially when occurring in a microplate. [ 1 ][ 2 ] Intraplate earthquakes are relatively rare compared to the more familiar ...
On January 21, 2009, the director of the Arkansas Earthquake Center at the University of Arkansas announced the discovery of a major fault line near Marianna which could generate a 7.0 earthquake in the future. The fault is close to, but appears to be separate from, the nearby New Madrid Seismic Zone. [18]