The second intersection of Reelfoot Fault with the river was immediately downstream of the town New Madrid (within 1 km). The latest quake, measuring 2.2 magnitude, happened around 3:30 p.m. Sunday. KAIT – In the last two weeks, the U.S. Geological Survey recorded 20 earthquakes along the New Madrid fault line.

Geologists have long blamed the New Madrid earthquakes on the Reelfoot Rift, a 500-million-year-old area of weakness in the crust.

It is estimated that there are about 150 quakes per year in this region.

The New Madrid Seismic Zone, also known as the Reelfoot Rift or the New Madrid Fault Line, is a major seismic zone located in the Midwestern United States Some estimations put the New Madrid Fault in jeopardy of strong, damaging earthquakes, measuring over 7.0 magnitude every 300 to 500 years. It’s by far the largest earthquake ever to strike the United States east of the Rockies.

On Dec. 16, 1811, a magnitude 7.7 earthquake hit the New Madrid fault line, which lies on the border region of Illinois, Indiana, Missouri, Arkansas, Kentucky, Tennessee and Mississippi. Other research suggests a far shorter time frame. New Madrid Seismic Zone (NMSZ), region of poorly understood, deep-seated faults in Earth’s crust that zigzag southwest-northeast through Arkansas, Missouri, Tennessee, and Kentucky, U.S. In the known history of the world, no other earthquakes have lasted so long or produced so much evidence of damage as the New Madrid earthquakes.

Lying in the central area of the North American Plate, the seismic zone is about 45 miles (70 km) wide and about 125 miles (200 km) long. New Madrid fault and earthquake-prone region considered at high risk today The 1811–12 New Madrid earthquakes ( / ˈ m æ d r ɪ d / ) 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. The New Madrid Seismic Zone (/ ˈ m æ d r ɪ d /), 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.. (KAIT) - In the last two weeks, the U.S. Geological Survey recorded 20 earthquakes along the New Madrid fault line.

Both fault lines touch there, in the Gulf, and when the New Madrid adjusts there is a sympathetic adjustment up along this fault line. It was located about 2 miles east-northeast of Ridgely, Tenn., and 33 miles east of Kennett, Mo. The solid straight line in the middle of the New Madrid seismic zone is the surface projection of the modeled fault, which ruptures in the simulation. But the newfound faults lie outside the rift.

The colors are keyed to the peak intensity of ground velocity at the surface. JONESBORO, Ark. It uplifted the riverbed by one-to-several meters, accounting for the large wave and retrograde current at New Madrid, independently described by Bryan (1848) and Nolte (1854). During the last New Madrid adjustment, church bells rang in Boston and cracks appeared in buildings in Savannah, GA and Charleston, SC.



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