Earthquake · reviewed by a seismologist
M 2.7md
Earthquake near Knoxville, TN
No earthquake was likely felt in Knoxville in the 24 hours to 9:16 am EST (14:16 UTC). The last one was M 2.1, 9 km (5 mi) S, at 2:55 pm EST on 5 November 2026, estimated intensity II (weak) in town. Every earthquake near Knoxville
This page: a magnitude 2.7 earthquake was recorded 49 km (31 mi) south of Knoxville, TN, at 1:55 pm EDT on 24 October 2021 (17:55 UTC), 7.6 km deep. 19 people have reported feeling it to USGS.
USGS: 19 km NNW of Lake Santeetlah, North Carolina
50 km (31 mi) S of Knoxville, TN
- When
- 1:55 pm EDT on 24 October 2021 ()
- Where
- 49 km (31 mi) south of Knoxville, TN · earthquakes near Knoxville
- North Carolina today
- every earthquake in North Carolina in the last 24 hours
- Magnitude
- M 2.7 (md)
- Depth
- 7.6 km below the surface
- Felt
- 19 reports · strongest reported intensity IV
- Nearest
- Blount County, 19 km N
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1768 days ago
Earthquake alerts for Knoxville, TN
Get a notification in this browser when USGS records an earthquake near Knoxville, TN. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 57 km (35 mi) from the epicentre. In Knoxville, 49 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Likely felt in: Maryville 27 km, intensity III · Farragut 44 km, intensity II · Seymour 47 km, intensity II · Knoxville 49 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 360 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 42,000× the energy of this one
- Magna, Utah 2020 M 5.7 30,000× the energy of this one
- Around the size people start to feel M 3.0 2.6× the energy of this one
- This earthquake M 2.7 about 360 lb of TNT
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
For this area
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 35.5180, -83.9618. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Blount County, TN | 19 km (12 mi) | N | earthquakes near Blount County |
| Graham County, NC | 22 km (14 mi) | SSE | earthquakes near Graham County |
| Monroe County, TN | 27 km (17 mi) | WSW | earthquakes near Monroe County |
| Loudon County, TN | 40 km (25 mi) | NW | earthquakes near Loudon County |
| Cherokee County, NC | 43 km (27 mi) | SSW | earthquakes near Cherokee County |
| Swain County, NC | 45 km (28 mi) | E | earthquakes near Swain County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
53 earthquakes have been recorded within 50 km since this one.
- 1.7 5 km E of Niota, Tennessee
- 1.7 8 km E of Greenback, Tennessee
- 2.4 7 km E of Etowah, Tennessee
- 1.6 1 km SSW of Eagleton Village, Tennessee
- 2.2 7 km ENE of Niota, Tennessee
- 2.5 7 km WSW of Bryson City, North Carolina
- 2.0 Tennessee-North Carolina border region
- 1.9 17 km SSE of Tellico Plains, Tennessee
- 2.4 10 km SW of Gatlinburg, Tennessee
- 2.0 16 km WSW of Bryson City, North Carolina
- 2.1 6 km WSW of Tellico Village, Tennessee
- 2.4 Tennessee-North Carolina border region
- 1.9 11 km E of Tellico Plains, Tennessee
- 2.5 4 km NNE of Greenback, Tennessee
- 2.1 Tennessee
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.