Earthquake · reviewed by a seismologist
M 2.3md
Earthquake near Dandridge, TN
No earthquake was likely felt in Dandridge in the 24 hours to 4:52 pm EST (21:52 UTC). The last one was M 2.3, 24 km (15 mi) SSW, at 12:26 pm EDT on 28 April 2026, estimated intensity II (weak) in town. Every earthquake near Dandridge
This page: a magnitude 2.3 earthquake was recorded 7 km (4 mi) north of Dandridge, TN, at 2:04 am EDT on 2 October 2021 (06:04 UTC), 17 km deep.
USGS: 7 km N of Dandridge, Tennessee
50 km (31 mi) ENE of Knoxville, TN
- When
- 2:04 am EDT on 2 October 2021 ()
- Where
- 7 km (4 mi) north of Dandridge, TN · earthquakes near Dandridge
- Magnitude
- M 2.3 (md)
- Depth
- 17 km below the surface
- Felt
- no reports yet
- Nearest
- Jefferson County, 5 km SW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1866 days ago
Earthquake alerts for Dandridge, TN
Get a notification in this browser when USGS records an earthquake near Dandridge, 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 minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 34 km (21 mi) from the epicentre. In Dandridge, 7 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: Sevierville 27 km, intensity II · Mascot 31 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 91 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 170,000× the energy of this one
- Magna, Utah 2020 M 5.7 120,000× the energy of this one
- Around the size people start to feel M 3.0 10× the energy of this one
- This earthquake M 2.3 about 91 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 36.0778, -83.4037. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Jefferson County, TN | 5 km (3 mi) | SW | earthquakes near Jefferson County |
| Hamblen County, TN | 20 km (12 mi) | NE | earthquakes near Hamblen County |
| Grainger County, TN | 24 km (15 mi) | NNW | earthquakes near Grainger County |
| Cocke County, TN | 31 km (19 mi) | SE | earthquakes near Cocke County |
| Sevier County, TN | 34 km (21 mi) | SSW | earthquakes near Sevier County |
| Union County, TN | 45 km (28 mi) | WNW | earthquakes near Union County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
44 earthquakes have been recorded within 50 km since this one.
- 2.1 7 km WNW of Pigeon Forge, Tennessee
- 2.1 6 km NNE of Rockford, Tennessee
- 2.3 1 km W of Rutledge, Tennessee
- 2.0 4 km WNW of Mascot, Tennessee
- 1.9 3 km NW of Mascot, Tennessee
- 2.3 4 km N of Pigeon Forge, Tennessee
- 2.1 2 km S of Blaine, Tennessee
- 2.1 7 km SE of Knoxville, Tennessee
- 1.9 5 km NNW of Mascot, Tennessee
- 1.9 9 km WSW of Mascot, Tennessee
- 1.8 0 km ESE of Knoxville, Tennessee
- 2.2 10 km ENE of Knoxville, Tennessee
- 2.5 6 km SE of Seymour, Tennessee
- 2.3 11 km ESE of Mascot, Tennessee
- 2.0 8 km ENE of Knoxville, 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.