Why Was There an Earthquake in New Madrid?

By Alice Nichols

The New Madrid earthquake was a series of seismic events that occurred in the central United States in 1811 and 1812. The earthquakes were among the largest to ever hit North America east of the Rocky Mountains, and they caused widespread damage throughout the region.

But why did these earthquakes happen? Let’s take a closer look.

What is the New Madrid Seismic Zone?

The New Madrid Seismic Zone is a region of the United States that stretches from northeastern Arkansas to southern Illinois. The zone is named after the town of New Madrid, Missouri, which was near the epicenter of the 1811-1812 earthquakes.

Tectonic Activity

The cause of earthquakes in this area can be traced back to tectonic activity. The North American Plate and the Caribbean Plate are constantly moving against each other, and this movement causes stress to build up along fault lines in the earth’s crust. When this stress becomes too great, it is released in the form of an earthquake.

The 1811-1812 Earthquakes

The 1811-1812 earthquakes were caused by a series of three major earthquakes that occurred over a period of several months. The first earthquake, which was estimated to be around magnitude 8, occurred on December 16th, 1811. This earthquake was followed by two more major earthquakes on January 23rd and February 7th, both estimated to be around magnitude 7.

The Aftermath

The earthquakes caused widespread damage throughout the region, including in areas as far away as St. Louis and Cincinnati. They also caused changes to the landscape, including new lakes and waterfalls.

Conclusion

In conclusion, while we can’t predict when or where an earthquake will occur with certainty, we can understand why they happen. The New Madrid seismic zone is a prime example of the tectonic activity that causes earthquakes, and the 1811-1812 earthquakes serve as a reminder of the power and unpredictability of nature.