The New Madrid Seismic Zone | U.S. Geological Survey - USGS.gov
In the New Madrid seismic zone, many sand blows appear as light-colored sandy patches in plowed fields. Flood deposits bury other sand blows. Viewed from above, sand blow have circular, elliptical, and linear shapes and can range up to tens of …
Computer Simulation of a Magnitude 7.7 Earthquake in the New Madrid …
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. The colors are keyed to the peak intensity of ground velocity at the surface.
New Madrid seismic zone - Wikipedia
The New Madrid seismic zone (NMSZ), sometimes called the New Madrid fault line (or fault zone or fault system), 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 Seismic Zone Earthquake Hazard Article and Map - Geology.com
New Madrid earthquake map: Topographic map showing earthquakes greater than magnitude 2.5 (circles) of the central United States. Red circles are earthquakes that occurred after 1972 from the USGS Preliminary Determination of Epicenters catalog.
The Great Midwest Earthquake of 1811 | Smithsonian
At 2:15 a.m. on December 16, 1811, residents of the frontier town of New Madrid, in what is now Missouri, were jolted from their beds by a violent earthquake. The ground heaved and pitched,...
Earthquake Hazards near the New Madrid Fault Zone
These large, flat croplands are vulnerable to the effects of uplift and down-dropping from large earthquakes, which will flood some areas that are now dry – destroying farmland – and will interrupt the flow of water in drainage ditches and natural channels.
The New Madrid fault zone (NMFZ) is a long-established weakness in the Earth’s crust in the central and eastern US where earthquakes have occurred for hundreds of millions of years. In 1811-1812, three large earthquakes (up to magnitude 7.5) caused severe damage to the area.
Earthquakes on the Mississippi: The New Madrid Seismic Zone
The New Madrid Seismic Zone lies within the Reelfoot Rift. To earthquake researchers like Hough, this region is an enigma. As her email notes, there are a lot of other failed mid-continent rifts in North America.
Map New Madrid Seismic Zone | U.S. Geological Survey - USGS.gov
Oct 2, 2019 · This map shows earthquakes (circles) of the New Madrid and Wabash Valley seismic zones (orange patches). Red circles indicate earthquakes that occurred from 1974 to 2002 with magnitudes larger than 2.5 located using modern instruments (University of Memphis).
At two locations, one upstream and one downstream from New Madrid, waterfalls or rapids formed in the Mississippi River channel (Penick, 1981; Purser and Van Arsdale, 1998). These displacements in the soft sediments in the river channel were eroded and obliterated rapidly.