QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

9 km WSW of Oakdale, Tennessee

· 13 km deep · released about 170 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Roane County 18 kmMorgan County 19 kmCumberland County 31 kmLoudon County 40 kmAnderson County 44 kmRhea County 49 kmFentress County 52 kmMeigs County 53 kmScott County 53 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 2.5 (md)
Depth
13 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Roane County, 18 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1182 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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.

Where

Epicentre 35.9672, -84.6532. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Roane County, TN 18 km (11 mi) NW of here earthquakes near Roane County
Morgan County, TN 19 km (12 mi) S of here earthquakes near Morgan County
Cumberland County, TN 31 km (19 mi) E of here earthquakes near Cumberland County
Loudon County, TN 40 km (25 mi) NW of here earthquakes near Loudon County
Anderson County, TN 44 km (28 mi) WSW of here earthquakes near Anderson County
Rhea County, TN 49 km (30 mi) NNE of here earthquakes near Rhea County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

28 earthquakes have been recorded within 50 km since this one.

  1. 2.2 10 km WNW of Philadelphia, Tennessee
  2. 1.6 5 km WSW of Friendsville, Tennessee
  3. 2.2 10 km WNW of Philadelphia, Tennessee
  4. 2.4 3 km WNW of Friendsville, Tennessee
  5. 1.8 3 km E of Philadelphia, Tennessee
  6. 2.2 13 km S of Midtown, Tennessee
  7. 2.0 3 km WNW of Huntsville, Tennessee
  8. 2.1 3 km NE of Niota, Tennessee
  9. 1.9 5 km SSW of Sweetwater, Tennessee
  10. 2.1 0 km S of Loudon, Tennessee
  11. 1.9 2 km NE of Niota, Tennessee
  12. 1.6 3 km ENE of Sweetwater, Tennessee
  13. 1.6 7 km WSW of Tellico Village, Tennessee
  14. 1.7 7 km ESE of Sweetwater, Tennessee
  15. 1.8 7 km ESE of Sweetwater, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2018-12-12 — it released about 710 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.