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Magnetic potential map of the Reelfoot Rift. 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.
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.
Al-Shukri believes that the fault was created 5,000 years ago. Previously, the predicted earthquake damage Marianna, Arkansas might receive from the more distant New Madrid Fault suffering a 7.0 earthquake was 100% architectural and content damage, half of all bridges suffering some damage, 2,955 displaced residents, and loss of phones and ...
The Guy-Greenbrier earthquake swarm occurred in central Arkansas beginning in August 2010. [2] The epicenters of earthquakes in the swarm showed a linear distribution, with a clear overall shift in activity towards the southwest with time, [3] and the largest event in the swarm was the 2011 Arkansas earthquake, at 4.7 on the moment magnitude scale.
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 fault off the Pacific coast could devastate Washington, Oregon and Northern California with a major earthquake and tsunami. Researchers mapped it comprehensively for the first time.
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 interplate ...
Other regional faults such as the Washita Valley fault which runs parallel to the Meers fault may also be capable of causing earthquakes. [58] Earthquake hazard map published in 2014. The USGS national hazard map states that the Meers fault has a recurrence interval of 4,500 years [47] but estimates range from 100,000 years to 1,300 years. [14]