Computer Simulation of a Magnitude 7.7 Earthquake in the New Madrid …
This animation shows the simulated ground motion of the Earth’s surface that could occur in the central U.S. region for a magnitude 7.7 strike-slip earthquake on the southern section of the New Madrid seismic zone.
The New Madrid Seismic Zone | U.S. Geological Survey - USGS.gov
A series of earthquakes hit the New Madrid seismic zone of southeastern Missouri, northeastern Arkansas, and adjacent parts of Tennessee and Kentucky, in December 1811 to February 1812. Three earthquakes had a magnitude of 7.0 or greater.
1811–1812 New Madrid earthquakes - Wikipedia
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 similar magnitude followed in January and February 1812.
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.
Types of damage that could result from a great earthquake in the New …
Photographs 5 and 6 show damage to modern structures close to the epicenter of a magnitude 6.5 earthquake, a small shock compared to the magnitudes (8.4–8.7) of the New Madrid earthquakes. Photographs 8–10 are typical of damage that can occur at large distances from great earthquakes.
Summary of 1811-1812 New Madrid Earthquakes Sequence
Overview. A Sequence of Three Main Shocks in 1811-1812. This sequence of three very large earthquakes is usually referred to as the New Madrid earthquakes, after the Missouri town that was the largest settlement on the Mississippi River …
Analysing the 1811–1812 New Madrid earthquakes with recent
May 20, 2004 · Our interpretation is consistent with established magnitude/fault area results, and do not require exceptionally large fault areas or stress drop values for the New Madrid mainshocks.
New Madrid Rift Zone - ArcGIS StoryMaps
Dec 9, 2019 · Because the New Madrid Earthquake sequence occurred long before the Richter Scale was developed, scientist must use eyewitness accounts to rate the earthquake damage using the Modified Mercalli Intensity Scale (MMI).
The earthquake magnitudes whose values range between 7.1 and 8.0 (Petersen et al., 2008), controlling ground motion levels in the New Madrid Seismic Zone have large uncertainties, and are based on controversial magnitude estimates of the 1811-1812 earthquakes in the region.
Possible causes of the New Madrid earthquakes - Encyclopedia Britannica
New Madrid earthquakes of 1811–12 - Fault Lines, Seismic Activity, Intensity: Over the past 4,500 years, a number of major earthquakes of magnitude 7.0 to 8.0 occurred in the NMSZ. These events include clusters of large earthquakes that have been dated to …