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Bicentennial of the 1811-1812 New Madrid earthquake sequence December 2011-2012

General Information Product 118

Prepared in Cooperation with the National Park Service
By:

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Abstract

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. The first earthquake occurred December 16, 1811, at 2:15 a.m.; the second 9 a.m. on January 23, 1812; and the third on February 7, 1812, at 3:45 a.m. These three earthquakes were among the largest to strike North America since European settlement. The main shocks were followed by many hundreds of aftershocks that lasted for decades. Many of the aftershocks were major earthquakes themselves. The area that was strongly shaken by the three main shocks was 2-3 times as large as the strongly shaken area of the 1964 M9.2 Alaskan earthquake, and 10 times as large as that of the 1906 M7.8 San Francisco earthquake.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Bicentennial of the 1811-1812 New Madrid earthquake sequence December 2011-2012
Series title:
General Information Product
Series number:
118
Edition:
-
Year Published:
2010
Language:
ENGLISH
Publisher:
U.S. Geological Survey
Contributing office(s):
Geologic Hazards Science Center
Description:
1 Poster: 48 inches x 30 inches
Online Only (Y/N):
N
Additional Online Files(Y/N):
Y