QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

Earthquake near Maynardville, TN

USGS: 14 km N of Maynardville, Tennessee

48 km (30 mi) NNE of Knoxville, TN

2:31 am EDT, Apr 22, 2017 · · 27 km deep · released about 130 lb of TNT

Every earthquake near Maynardville Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Union County 12 kmClaiborne County 18 kmGrainger County 28 kmCampbell County 33 kmBell County 40 kmKnox County 46 kmAnderson County 47 kmJefferson County 49 kmHamblen County 51 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
2:31 am EDT on 22 April 2017 ()
Where
15 km (9 mi) N of Maynardville, TN · earthquakes near Maynardville
Magnitude
M 2.4 (md)
Depth
27 km below the surface
Felt
no reports yet
Nearest
Union County, 12 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3451 days ago

A magnitude 2.4 earthquake was recorded 15 km (9 mi) N of Maynardville, TN, at 2:31 am EDT on 22 April 2017 (06:31 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Speedwell, New Tazewell, Luttrell, Tazewell, Condon, Fincastle.

How big was it?

This earthquake released about 130 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 110,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 80,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.2× the energy of this one
  4. This earthquake M 2.4 about 130 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 36.3857, -83.7953. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Union County, TN 12 km (7 mi) SSW earthquakes near Union County
Claiborne County, TN 18 km (11 mi) NE earthquakes near Claiborne County
Grainger County, TN 28 km (18 mi) ESE earthquakes near Grainger County
Campbell County, TN 33 km (20 mi) W earthquakes near Campbell County
Bell County, KY 40 km (25 mi) NNE earthquakes near Bell County
Knox County, TN 46 km (28 mi) SSW earthquakes near Knox County

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

Aftershocks so far

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

  1. 2.3 4 km E of Harrogate, Tennessee
  2. 2.2 12 km SW of Pathfork, Kentucky
  3. 2.5 8 km WSW of New Market, Tennessee
  4. 2.0 6 km WSW of New Tazewell, Tennessee
  5. 2.4 7 km N of Dandridge, Tennessee
  6. 2.3 7 km N of Dandridge, Tennessee
  7. 2.2 6 km N of Dandridge, Tennessee
  8. 2.0 3 km W of Knoxville, Tennessee
  9. 1.8 6 km NNW of Mascot, Tennessee
  10. 2.1 6 km NNW of Mascot, Tennessee
  11. 2.5 Kentucky-Tennessee border region
  12. 2.8 8 km NW of Fincastle, Tennessee
  13. 2.5 7 km WSW of New Market, Tennessee
  14. 2.1 2 km NNE of Maynardville, Tennessee
  15. 2.3 0 km SW 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.