QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

3 km ESE of Garland, Tennessee

· 19 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Knox County 20 kmBlount County 22 kmLoudon County 25 kmAnderson County 32 kmRoane County 40 kmMonroe County 47 kmSevier County 50 kmUnion County 53 kmGraham County 60 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
19 km below the surface
Felt
67 reports · strongest reported intensity IV
Nearest
Knox County, 20 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2780 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 67 people have 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 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× 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 35.8455, -84.0747. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Knox County, TN 20 km (13 mi) SW of here earthquakes near Knox County
Blount County, TN 22 km (14 mi) NW of here earthquakes near Blount County
Loudon County, TN 25 km (15 mi) ENE of here earthquakes near Loudon County
Anderson County, TN 32 km (20 mi) SSE of here earthquakes near Anderson County
Roane County, TN 40 km (25 mi) E of here earthquakes near Roane County
Monroe County, TN 47 km (29 mi) NNE of here earthquakes near Monroe County

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

Aftershocks so far

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

  1. 2.1 6 km WNW of Vonore, Tennessee
  2. 2.0 4 km ESE of Huntsville, Tennessee
  3. 2.2 5 km ENE of Wildwood, Tennessee
  4. 2.1 2 km WNW of Tellico Village, Tennessee
  5. 2.3 1 km ESE of Farragut, Tennessee
  6. 1.7 10 km SSE of Vonore, Tennessee
  7. 1.6 8 km SSE of Vonore, Tennessee
  8. 1.7 6 km WSW of Tellico Village, Tennessee
  9. 1.7 11 km WNW of Loudon, Tennessee
  10. 2.2 3 km SSW of Garland, Tennessee
  11. 2.4 0 km SSW of Rockford, Tennessee
  12. 1.9 6 km SW of Tellico Village, Tennessee
  13. 1.7 5 km WNW of Sevierville, Tennessee
  14. 2.2 5 km W of Sevierville, Tennessee
  15. 2.1 9 km ESE of Vonore, 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.