QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

5 km NNW of Mascot, Tennessee

· 5.5 km deep · released about 20 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Knox County 20 kmUnion County 21 kmJefferson County 30 kmGrainger County 30 kmAnderson County 39 kmSevier County 41 kmClaiborne County 45 kmHamblen County 46 kmBlount County 48 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 1.9 (md)
Depth
5.5 km below the surface
Felt
no reports yet
Nearest
Knox County, 20 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 229 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 20 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 760,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 540,000× the energy of this one
  3. Around the size people start to feel M 3.0 48× the energy of this one
  4. This earthquake M 1.9 about 20 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 36.1043, -83.7622. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Knox County, TN 20 km (12 mi) NE of here earthquakes near Knox County
Union County, TN 21 km (13 mi) SSE of here earthquakes near Union County
Jefferson County, TN 30 km (18 mi) WNW of here earthquakes near Jefferson County
Grainger County, TN 30 km (18 mi) SW of here earthquakes near Grainger County
Anderson County, TN 39 km (24 mi) E of here earthquakes near Anderson County
Sevier County, TN 41 km (26 mi) NNW of here earthquakes near Sevier County

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

Aftershocks so far

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

  1. 2.3 1 km W of Rutledge, Tennessee
  2. 2.0 4 km WNW of Mascot, Tennessee
  3. 1.9 3 km NW of Mascot, Tennessee
  4. 1.8 0 km SE of Farragut, Tennessee
  5. 1.7 4 km NE of Louisville, Tennessee
  6. 2.0 3 km WSW of Alcoa, Tennessee
  7. 2.2 3 km WSW of Alcoa, Tennessee
  8. 2.3 4 km N of Pigeon Forge, Tennessee
  9. 2.1 2 km S of Blaine, Tennessee
  10. 2.1 7 km SE 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

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