On the morning of Saturday, May 10, 2025, a 4.1 magnitude earthquake struck near Greenback, Tennessee, approximately 30 miles southwest of Knoxville. The tremor occurred at 9:04 a.m. EDT and was felt across multiple states, including Georgia, North Carolina, and South Carolina, with reports of shaking as far as Atlanta.
Widespread Impact and Public Response
The United States Geological Survey (USGS) initially reported the quake as a 3.5 magnitude event but later updated it to 4.1. The earthquake originated at a depth of nearly 25 miles, allowing seismic waves to travel extensively. Over 23,000 individuals reported feeling the tremor within the first hour. News
Infrastructure and Safety Assessments
Despite the widespread sensation, there have been no reports of injuries or significant structural damage. The Tennessee Department of Transportation is conducting inspections of bridges as a precautionary measure. A brief gas leak was reported in West Knox County but was promptly addressed.
The Tennessee Valley Authority noted that only the Fontana Dam experienced movement sufficient to warrant inspection, which revealed no issues. Major attractions in Sevier County, including Dollywood and The Island in Pigeon Forge, reported no damage.
Seismic Context and Future Considerations
This earthquake is notable as the seventh of magnitude 4.0 or higher in Tennessee since 1900 and the first since 2018. The region lies within the East Tennessee Seismic Zone, known for regular seismic activity, though quakes of this magnitude are uncommon.
The USGS estimates a 23% chance of aftershocks exceeding magnitude 3.0 within the next week. While earthquakes between magnitudes 3.5 and 5.4 are usually felt, they infrequently cause significant damage.
Preparedness and Safety Measures
This event serves as a reminder of the importance of earthquake preparedness, even in regions not typically associated with major seismic activity. Residents are encouraged to review safety protocols and ensure that emergency plans are in place.
For ongoing updates and information, individuals can refer to the USGS Earthquake Map and local news outlets.