They have a nice story about it @ Wikipedia. They say it occurred in 1812, and it caused the Mississippi River to change course and also flow in reverse for a short time. I remember hearing that on a television show about it.
their were a total of four earthquakes that lasted about a year. they were from 1811 to 1812. 2 of them were in 1811 and 2 were in 1812.
New Madrid earthquake took place in [None].
Very Good, infact it is already well over 100 yrs --over do.
in1944