Earthquake · reviewed by a seismologist
M 2.1md
Earthquake near Alcoa, TN
No earthquake was likely felt in Alcoa in the 24 hours to 5:07 am EST (10:07 UTC). The last one was M 2.1, 12 km (8 mi) NNE, at 2:55 pm EST on 5 November 2026, estimated intensity II (weak) in town. Every earthquake near Alcoa
This page: a magnitude 2.1 earthquake was recorded 3 km (2 mi) west of Alcoa, TN, at 11:14 am EDT on 26 July 2019 (15:14 UTC), 9.4 km deep. 6 people have reported feeling it to USGS.
USGS: 2 km W of Alcoa, Tennessee
21 km (13 mi) SSW of Knoxville, TN
- When
- 11:14 am EDT on 26 July 2019 ()
- Where
- 3 km (2 mi) west of Alcoa, TN · earthquakes near Alcoa
- Magnitude
- M 2.1 (md)
- Depth
- 9.4 km below the surface
- Felt
- 6 reports · strongest reported intensity III
- Nearest
- Blount County, 13 km SSE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2588 days ago
Earthquake alerts for Alcoa, TN
Get a notification in this browser when USGS records an earthquake near Alcoa, 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 29 km (18 mi) from the epicentre. In Alcoa, 3 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 4 km, intensity II · Farragut 17 km, intensity II · Knoxville 21 km, intensity II · Seymour 28 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 51 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 300,000× the energy of this one
- Magna, Utah 2020 M 5.7 210,000× the energy of this one
- Around the size people start to feel M 3.0 19× the energy of this one
- This earthquake M 2.1 about 51 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 35.7863, -84.0022. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Blount County, TN | 13 km (8 mi) | SSE | earthquakes near Blount County |
| Knox County, TN | 24 km (15 mi) | NNE | earthquakes near Knox County |
| Loudon County, TN | 29 km (18 mi) | WSW | earthquakes near Loudon County |
| Anderson County, TN | 41 km (25 mi) | NNW | earthquakes near Anderson County |
| Sevier County, TN | 43 km (27 mi) | E | earthquakes near Sevier County |
| Monroe County, TN | 44 km (27 mi) | SSW | earthquakes near Monroe County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
52 earthquakes have been recorded within 50 km since this one.
- 2.0 3 km SSW of Garland, Tennessee
- 1.6 7 km WSW of Tellico Village, Tennessee
- 2.3 5 km NE of Greenback, Tennessee
- 2.3 0 km SW of Knoxville, Tennessee
- 1.6 3 km ENE of Philadelphia, Tennessee
- 2.5 11 km SSW of Maryville, Tennessee
- 2.3 7 km W of New Market, Tennessee
- 2.5 7 km SE of Maryville, Tennessee
- 2.0 3 km SSW of Loudon, Tennessee
- 2.1 6 km S of Sweetwater, Tennessee
- 2.0 Kentucky-Tennessee border region
- 2.6 7 km ENE of Seymour, Tennessee
- 2.4 8 km ENE of Seymour, Tennessee
- 1.9 Tennessee
- 1.5 4 km WSW of Tellico Village, 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.