Memphis faces a significant earthquake risk that surprises many, because it comes not from a plate boundary but from within the continent's interior. The city lies near the New Madrid Seismic Zone, a large intraplate fault system buried beneath the Mississippi Valley that is the most active source of earthquakes in the central and eastern United States. Intraplate quakes here can shake a much wider area than similar-magnitude West Coast events because the older, colder crust transmits seismic energy more efficiently.
Earthquakes in Memphis: The New Madrid Seismic Zone
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The zone produced one of the most dramatic earthquake sequences in U.S. history during the winter of 1811-1812, when at least three quakes estimated in the magnitude-7 to 8 range struck near New Madrid, Missouri, ringing church bells as far away as the East Coast and temporarily altering the course of the Mississippi River. Scientists estimate a meaningful probability of another damaging New Madrid earthquake in the coming decades, and Memphis's older buildings and soft river-valley soils make it especially vulnerable to strong shaking.
Frequently asked questions
Why does Memphis have earthquakes if it's not near a plate boundary?
Memphis lies near the New Madrid Seismic Zone, an intraplate fault system buried in the Mississippi Valley that generates earthquakes from stress within the North American plate, not a tectonic boundary.
What was the New Madrid earthquake of 1811-1812?
A sequence of at least three earthquakes estimated at magnitude 7 to 8 that struck near New Madrid, Missouri, one of the most powerful quake sequences in US history — it rang church bells on the East Coast and temporarily changed the Mississippi River's course.
Could a New Madrid earthquake happen again?
Scientists estimate a meaningful probability of another damaging earthquake in the New Madrid zone within the coming decades, based on the seismic history and ongoing minor activity recorded there.
Why do central US earthquakes shake a wider area than West Coast ones?
The crust in the central and eastern US is older and colder than on the West Coast, so it transmits seismic energy more efficiently, spreading shaking over a much larger radius for a similar magnitude.
Is Memphis vulnerable to earthquake damage?
Yes, more than its magnitude history suggests: many older buildings were not built to modern seismic codes, and soft river-valley soils can amplify shaking, a combination that raises real risk.
How often does the New Madrid zone produce earthquakes today?
It remains one of the most seismically active zones in the central and eastern United States, with small to moderate earthquakes recorded on a regular basis, though nothing near the size of 1811-1812 since.
Which states could feel a major New Madrid earthquake?
A repeat of the 1811-1812 sequence could be felt across a large swath of the central and eastern US, including Tennessee, Missouri, Arkansas, Kentucky, Illinois and neighboring states.
Where can I see live earthquake activity near Memphis?
The live map on this page shows real-time USGS data for the Memphis area and the New Madrid Seismic Zone, refreshed continuously.
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