The Day the Mississippi River Ran Backwards

Added: 2026-05-14

[00:00:00]In December 1811, the Mississippi River ran backwards.

[00:00:04]A lake appeared in Tennessee overnight.

[00:00:06]It's still there.

[00:00:08]And the ground across three states erupted in fountains of sand and water.

[00:00:13]These were the New Madrid earthquakes.

[00:00:16]Four massive shocks over two months felt across half of North America.

[00:00:21]The epicenter was in Missouri, a thousand miles from the nearest plate boundary.

[00:00:26]On February 7th, a quake created a temporary dam across the river.

[00:00:31]The Mississippi ran backwards. Boats drifting south were suddenly pushed north. Waterfalls appeared where the water had been flat. Islands vanished.

[00:00:41]Then the dam broke and the river crashed back.

[00:00:44]Across the region, the ground split open and geysers of black sand shot into the air.

[00:00:50]The craters they left are still visible in aerial photographs today.

[00:00:54]Why does this happen here?

[00:00:57]This is the middle of a stable tectonic plate. No subduction, no boundary.

[00:01:02]A 750 million year-old scar in the Earth's crust, still alive.

[00:01:08]Reelfoot Lake is still there.

[00:01:10]The USGS puts a 7 to 10% chance of a repeat within 50 years.