When Was the Last Time the New Madrid Fault Went Off?

By Michael Ferguson

The New Madrid Fault is a seismic zone located in the central United States. It stretches from northeastern Arkansas to southern Illinois, crossing through parts of Missouri, Tennessee, Kentucky, and Mississippi.

The fault is named after the city of New Madrid, Missouri and is known for producing some of the largest earthquakes in American history. But when was the last time the New Madrid Fault went off?

A Brief History of the New Madrid Fault

The New Madrid Fault has a long and complex history dating back millions of years. It is part of a larger system of faults that runs along the eastern edge of North America, known as the Eastern Tennessee Seismic Zone. The fault was responsible for a series of powerful earthquakes that struck the region between December 1811 and February 1812.

The 1811-1812 Earthquakes

The 1811-1812 earthquakes were some of the most powerful ever recorded in North America. The first earthquake struck on December 16, 1811 with an estimated magnitude of 7.5-7.7 on the Richter scale. This was followed by several more large earthquakes in January and February 1812.

According to historical accounts, these earthquakes caused widespread destruction throughout the region. They were felt as far away as Canada and Louisiana, and caused the Mississippi River to flow backwards for a short time. However, because the region was sparsely populated at that time, there were relatively few casualties.

Recent Activity

Since then, there have been several smaller earthquakes in the area but nothing on par with what happened in 1811-1812. However, scientists continue to monitor the region closely for signs of future seismic activity.

In recent years, there have been concerns about potential hazards associated with hydraulic fracturing or “fracking” operations near fault zones like New Madrid. Some studies suggest that these activities could trigger seismic activity in an otherwise stable region.

Conclusion

So when was the last time the New Madrid Fault went off? The answer is that it’s been over 200 years since the last major earthquake struck the region.

While there have been some smaller earthquakes in recent years, scientists believe that the region is currently in a period of relative stability. However, they caution that seismic activity can be unpredictable and that it’s important to remain vigilant and prepared for any potential earthquakes in the future.