Bicentennial of the 1811-1812 New Madrid earthquake sequence December 2011-2012; 2010; GIP; 118; U.S. Geological Survey
Although most of Tiptonville dome formed between 200 and 2,000 years ago, additional uplifting deformed the northwest and southeast parts of the dome during the earthquakes of 1811-1812.This powerful earthquake was felt widely over the entire eastern United States. Click on a pin on the map to see more information.
Surface fault rupturing from these earthquakes has not been detected and was not reported, however. Hough believes that this large aftershock occurred around dawn in the New Madrid region near the surface projection of the Reelfoot fault.The second principal shock of the 1811-1812 sequence. Recent research on New Madrid area seismicity has demonstrated that the 1811–12 earthquakes were not simply an anomaly, but part of a continuing series of earthquakes that goes back several thousand years.
The first earthquake occurred December 16, 1811, at 2:15 a.m.; the second 9 a.m. on January 23, 1812; and the...There is broad agreement in the scientific community that a continuing concern exists for a major destructive earthquake in the New Madrid seismic zone. Intraplate quakes can clearly pack a wallop. A strong correlation exists between modern seismicity and the uplift, indicating that stresses that produced the uplift may still exist today. Ponds of water also were agitated noticeably.The Lake County uplift, about 50 kilometers long and 23 kilometers wide, stands above the surrounding Mississippi River Valley by as much as 10 meters in parts of southwest Kentucky, southeast Missouri, and northwest Tennessee. ; Dart, R. L. Februar 1812 ereigneten sich drei Erdbeben, deren Epizentren um New Madrid lagen und von denen jedes die Magnitude 7 hatte. It explains the need for concern about earthquakes for those residents and describes what one can expect...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. However, it is unknown whether this <550 yr recurrence interval has been constant throughout the Holocene given limited geomorphic evidence of prior...Earthquake activity in parts of the central United States has increased dramatically in recent years. Huge waves on the Mississippi River overwhelmed many boats and washed others high onto the shore. In total, Otto Nuttli reported more than 200 moderate to large aftershocks in the New Madrid region between December 16, 1811, and March 15, 1812: ten of these were greater than about 6.0; about one hundred were between M5.0 and 5.9; and eighty-nine were in the magnitude 4 range. This would make a total of seven earthquakes of magnitude M6.0-7.5 occurring in the period December 16, 1811 through February 7, 1812. Lake St. Francis, in eastern Arkansas, which was formed by subsidence during both prehistoric and the 1811-1812 earthquakes, is 64 kilometers long by 1 kilometer wide.
Earthquake Hazard in the Heart of the Homeland; 2002; FS; 131-02; Geological Survey (U.S.) It appears here by permission of the author and the original publisher. Subsidence there ranged from 1.5 to 6 meters, although larger amounts were reported.Other areas subsided by as much as 5 meters, although 1.5 to 2.5 meters was more common. The space-time distribution of the increased seismicity, as well as numerous published case studies, indicates that the increase is of anthropogenic origin, principally driven by injection of wastewater coproduced with oil and gas from tight...This poster summarizes a few of the more significant facts about the series of large earthquakes that struck the New Madrid seismic zone of southeastern Missouri, northeastern Arkansas, and adjacent parts of Tennessee and Kentucky from December 1811 to February 1812.
The area of strong shaking associated with these shocks is two to three times as large as that of the 1964 Alaska earthquake and 10 times as large as that of the 1906 San Francisco earthquake. These eyewitness accounts give a glimpse at what was seen and experienced by people as the earthuquakes occurred. The extent of the area that experienced damaging earth motion, which produced Modified Mercalli Intensity greater than or equal to VII, is estimated to be 600,000 square kilometers.