Earthquake · reviewed by a seismologist
M 1.7md
Earthquake near Greenback, TN
No earthquake was likely felt in Greenback in the 24 hours to 11:49 am EST (16:49 UTC). The last one was M 2.4, 27 km (17 mi) NW, at 1:54 am EDT on 30 October 2026, estimated intensity II (weak) in town; 3 felt reports to USGS. Every earthquake near Greenback
This page: a magnitude 1.7 earthquake was recorded 5 km (3 mi) northeast of Greenback, TN, at 11:53 am EST on 30 November 2025 (16:53 UTC), 12 km deep. 1 person has reported feeling it to USGS.
USGS: 5 km NE of Greenback, Tennessee
35 km (22 mi) SSW of Knoxville, TN
- When
- 11:53 am EST on 30 November 2025 ()
- Where
- 5 km (3 mi) northeast of Greenback, TN · earthquakes near Greenback
- Magnitude
- M 1.7 (md)
- Depth
- 12 km below the surface
- Felt
- 1 report · strongest reported intensity II
- Nearest
- Loudon County, 18 km WNW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 346 days ago
Earthquake alerts for Greenback, TN
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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 7 km (4 mi) from the epicentre. In Greenback, 5 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.
Earthquakes near other towns within 30 km: Tellico Village, Vonore, Maryville, Louisville, Lenoir City, Alcoa.
How big was it?
This earthquake released about 12 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
- Magna, Utah 2020 M 5.7 870,000× the energy of this one
- Around the size people start to feel M 3.0 78× the energy of this one
- This earthquake M 1.7 about 12 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
The largest earthquake within 50 km since 2016 was M 4.1 on 2025-05-10 — about 3,500 times the energy of this one.
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 35.6883, -84.1245. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Loudon County, TN | 18 km (11 mi) | WNW | earthquakes near Loudon County |
| Blount County, TN | 18 km (11 mi) | E | earthquakes near Blount County |
| Monroe County, TN | 29 km (18 mi) | SSW | earthquakes near Monroe County |
| Knox County, TN | 38 km (23 mi) | NNE | earthquakes near Knox County |
| Roane County, TN | 40 km (25 mi) | WNW | earthquakes near Roane County |
| Graham County, NC | 46 km (29 mi) | SE | earthquakes near Graham County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
47 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
- 1.6 1 km SSW of Sweetwater, Tennessee
- 1.6 3 km SSW of Huntsville, Tennessee
- 2.4 11 km NW of Huntsville, Tennessee
- 1.7 5 km SSW of Maryville, Tennessee
- 1.9 7 km SW of Tellico Village, Tennessee
- 1.7 8 km ESE of Englewood, Tennessee
- 2.1 5 km NNE of Greenback, Tennessee
- 2.0 1 km S of Tellico Village, Tennessee
- 2.1 1 km S of Tellico Village, Tennessee
- 1.7 1 km ENE of Sweetwater, Tennessee
- 2.0 3 km SW of Tellico Village, Tennessee
- 1.6 8 km E of Englewood, Tennessee
- 1.8 8 km E of Englewood, 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.