Iowa’s southern counties are on alert as the New Madrid Seismic Zone, known for massive earthquakes, looms nearby, ...

The New Madrid Fault zone is a significant seismic threat located in the central United States, stretching across parts of Missouri, Arkansas, Tennessee, Kentucky, and Illinois. Unlike the well ...

That’s roughly on par with the series of three massive earthquakes that the New Madrid fault system produced over a period of weeks in 1811 and 1812, when Missouri’s Bootheel region was at the ...

The New Madrid has produced much larger quakes, most notably in 1811 and 1812 in New Madrid, Mo., when a series of three quakes struck, ranging in estimated magnitudes of 7.2-8.0.

New Madrid, Missouri, was terrorized by its fault line in the early 19th century, and earthquakes are still the region's claim to fame. But these days, earthquake insurance is prohibitively expensive.

It's been over 100 years since New Madrid's last major ... sensitive equipment throughout the fault area, ... next 50 years is as high as 40% and could cause up to $300 billion in damage. ...