On the morning of May 10, 2025, a 4.1-magnitude earthquake struck near Greenback, Tennessee, sending tremors across multiple southeastern states. The quake occurred at 9:04 a.m. EDT, with the epicenter located approximately 30 miles southwest of Knoxville, according to the U.S. Geological Survey (USGS).
A- Shaking Felt Across Several States.
Though centered in eastern Tennessee, the quake was felt as far away as Atlanta, western North Carolina, Kentucky, Virginia, Georgia, and Alabam*. In the first hour alone, more than 23,000 people reported feeling the shaking through the USGS’s “Did You Feel It?
B-No Reports of Damage
Despite the wide reach of the tremor, emergency services reported no significant impact. The Knoxville Fire Department and Police Department confirmed they received no reports of damage or injuries. This aligns with typical effects of a quake of this magnitude. According to Michigan Technological University, earthquakes between 2.5 and 5.4 are “often felt, but rarely cause damage.”
C-Seismic Activity in Tennessee
While not typically associated with strong earthquakes, Tennessee lies within the Eastern Tennessee Seismic Zone, one of the most active fault lines in the southeastern United States. In the last 30 days, Tennessee has recorded 21 smaller earthquakes, and only three in the past year have exceeded a magnitude of 3.0—making this event the most notable in recent months.
D-Aftershock Risk Remains Low
The USGS estimates a 5% chance of aftershocks of magnitude 4.0 or higher in the coming week. Residents are encouraged to stay aware but not alarmed, as most aftershocks, if they occur, tend to be mild.
E- Earthquake Magnitude: What It Means
For those unfamiliar with how earthquake strength is measured, here’s a quick guide:
-2.5 to 5.4: Minor or no damage
-Below 2.5: Generally not felt
-5.5 to 6.0: Slight damage to buildings
-6.1 to 6.*: Serious structural damage
-7.0 and above: Major damage possible
-8.0+: Devastating, capable of destroying entire communities.
D- Felt the Quake?
If you experienced the tremor, you can share your observation on the USGS. These public reports help scientists map the reach and intensity of seismic events more accurately.
As a region familiar with minor tremors, Saturday’s earthquake serves as a reminder of the Southeast’s active geological profile—and the importance of staying informed, even in areas not typically associated with major quakes.