QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

3 km S of Blaine, Tennessee

· 9.9 km deep · released about 450 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Union County 21 kmGrainger County 24 kmJefferson County 25 kmKnox County 26 kmHamblen County 41 kmSevier County 41 kmClaiborne County 42 kmAnderson County 44 kmCampbell 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
Magnitude
M 2.8 (md)
Depth
9.9 km below the surface
Felt
25 reports · strongest reported intensity III
Nearest
Union County, 21 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1512 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 25 people have reported feeling it to USGS.

How big was it?

This earthquake released about 450 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 34,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 24,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.1× the energy of this one
  4. This earthquake M 2.8 about 450 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 36.1257, -83.7027. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Union County, TN 21 km (13 mi) SE of here earthquakes near Union County
Grainger County, TN 24 km (15 mi) SW of here earthquakes near Grainger County
Jefferson County, TN 25 km (16 mi) WNW of here earthquakes near Jefferson County
Knox County, TN 26 km (16 mi) NE of here earthquakes near Knox County
Hamblen County, TN 41 km (25 mi) WSW of here earthquakes near Hamblen County
Sevier County, TN 41 km (25 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

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

  1. 1.7 5 km WNW of Sevierville, Tennessee
  2. 2.2 5 km W of Sevierville, Tennessee
  3. 2.6 2 km SSE of Mascot, Tennessee
  4. 2.1 2 km W of Alcoa, Tennessee
  5. 3.0 7 km SW of New Tazewell, Tennessee
  6. 1.6 3 km SSE of Garland, Tennessee
  7. 1.9 4 km SSE of Garland, Tennessee
  8. 2.3 1 km ENE of Maryville, Tennessee
  9. 2.4 7 km SW of Mascot, Tennessee
  10. 1.8 1 km WNW of Eagleton Village, Tennessee
  11. 2.0 0 km W of Maryville, Tennessee
  12. 2.3 0 km WSW of Maryville, Tennessee
  13. 3.4 7 km NE of Maynardville, Tennessee
  14. 2.0 8 km SE of Rutledge, Tennessee
  15. 2.2 1 km SSW of Morristown, 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

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