M3.0 earthquake 6 km NE of Greenback, Tennessee
A magnitude 3.0 earthquake struck 6 km NE of Greenback, Tennessee on Tue, Sep 24, 1991, 3:21 AM EDT (07:21 UTC), 13 km (8 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.0 (mb_Lg, Lg-wave body), minor
- Magnitude from
- SE
- Local time
- UTC
- 1991-09-24 07:21:07 UTC
- Depth
- 13.3 km (8.3 mi), shallow
- Epicenter
- 35.701° N, 84.117° W
- Region
- Tennessee
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 3.0 | mb_Lg, Lg-wave body | SE | Preferred · Final |
| 3.3 | Md, duration | USGS National Earthquake Information Center | Reviewed |
What happened
The USGS’s account of the effects of this earthquake.
Felt (IV) at Friendsville, Louisville, Maryville and Tallassee. Felt (III) at Alcoa and Greenback.
From the USGS event page for se61156. U.S. Geological Survey text and figures are in the public domain.
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Depth from
- From location
- Station coverage gap
- 58°
- Stations used
- 43
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 1 in the 30 days before it.
After
- 1.95 km ESE of Vonore, Tennessee · 12772 days ago · 8 km deep · 15 km away
- 1.710 km NNE of Seymour, Tennessee · 12761 days ago · 6 km deep · 50 km away
- 1.613 km NNE of Decatur, Tennessee · 12758 days ago · 12 km deep · 55 km away
- 1.816 km E of Tellico Plains, Tennessee · 12740 days ago · 7 km deep · 40 km away
- 2.25 km SSE of Madisonville, Tennessee · 12734 days ago · 10 km deep · 33 km away
- 2.210 km SE of Madisonville, Tennessee · 12733 days ago · 14 km deep · 30 km away
Before
Earthquakes todayTennessee earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event se61156 (also filed as usp0004wzj). Read Fri, Oct 2, 2026, 1:14 AM UTC.