Historic Earthquakes
New Madrid Earthquakes 1811-1812
New Madrid 1811-1812 Earthquakes
Isoseismal Map
Isoseismal map for
the Arkansas earthquake
of December 16,1811, 08:15 UTC
(first of the 1811-1812 New Madrid series).
Abridged from Seismicity of the United States, 1568-1989 (Revised), by Carl W. Stover and Jerry L. Coffman, U.S. Geological Survey Professional Paper 1527, United States Government Printing Office, Washington: 1993.
