M3.7 earthquake 7 km NW of Mascot, Tennessee
A magnitude 3.7 earthquake struck 7 km NW of Mascot, Tennessee on Fri, Jul 10, 1987, 8:04 PM EDT (00:04 UTC), 25 km (16 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.7 (mb_Lg, Lg-wave body), minor
- Magnitude from
- SE
- Local time
- UTC
- 1987-07-11 00:04:29 UTC
- Depth
- 25.1 km (15.6 mi), shallow
- Epicenter
- 36.105° N, 83.816° 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 |
|---|---|---|---|
| 3.7 | mb_Lg, Lg-wave body | SE | Preferred · Final |
| 3.6 | Md, duration | USGS National Earthquake Information Center | Reviewed |
What happened
The USGS’s account of the effects of this earthquake.
Felt (V) at Clinton and (IV) at Alcoa, Caryville, Dandridge, Jacksboro, Knoxville, Mascot, Maynardville, New Tazewell, Powell, Seymour and Washburn. Felt in Anderson, Blount, Campbell, Claiborne, Cox, Cumberland, Grainger, Hamblen, Jefferson, Knox, Loudon, Sevier, Scott and Union Counties.
From the USGS event page for se60642. 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
- 45°
- Stations used
- 57
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 1 in the 30 days before it.
After
- 2.07 km NW of Mascot, Tennessee · 14329 days ago · 22 km deep · 0 km away
- 3.28 km NW of Mascot, Tennessee · 14329 days ago · 24 km deep · 0 km away
- 2.46 km ENE of Knoxville, Tennessee · 14323 days ago · 13 km deep · 14 km away
- 1.813 km ESE of Greenback, Tennessee · 14284 days ago · 14 km deep · 56 km away
- 3.12 km W of Madisonville, Tennessee · 14276 days ago · 21 km deep · 84 km away
Before
Earthquakes todayTennessee earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event se60642 (also filed as usp00036j4). Read Sat, Oct 3, 2026, 6:33 AM UTC.