QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

6 km NW of Mascot, Tennessee

· 9.2 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Knox County 17 kmUnion County 21 kmJefferson County 32 kmGrainger County 32 kmAnderson County 36 kmSevier County 42 kmClaiborne County 46 kmCampbell County 47 kmBlount County 47 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 1.8 (md)
Depth
9.2 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Knox County, 17 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2311 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 36.0992, -83.7963. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Knox County, TN 17 km (11 mi) NE of here earthquakes near Knox County
Union County, TN 21 km (13 mi) S of here earthquakes near Union County
Jefferson County, TN 32 km (20 mi) W of here earthquakes near Jefferson County
Grainger County, TN 32 km (20 mi) SW of here earthquakes near Grainger County
Anderson County, TN 36 km (22 mi) E of here earthquakes near Anderson County
Sevier County, TN 42 km (26 mi) NW of here earthquakes near Sevier County

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

Aftershocks so far

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

  1. 2.2 1 km SE of Alcoa, Tennessee
  2. 2.4 6 km W of Pittman Center, Tennessee
  3. 2.3 1 km NNW of Wildwood, Tennessee
  4. 2.1 2 km NW of Wildwood, Tennessee
  5. 2.6 9 km ENE of Garland, Tennessee
  6. 2.5 8 km WSW of New Market, Tennessee
  7. 2.4 7 km NNE of Garland, Tennessee
  8. 1.7 6 km E of Townsend, Tennessee
  9. 2.5 Tennessee-North Carolina border region
  10. 2.0 6 km WSW of New Tazewell, Tennessee
  11. 2.4 7 km N of Dandridge, Tennessee
  12. 2.3 7 km N of Dandridge, Tennessee
  13. 2.2 6 km N of Dandridge, Tennessee
  14. 1.9 6 km E of Friendsville, Tennessee
  15. 2.4 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.