QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

7 km ESE of Calhoun, Tennessee

· 16 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N McMinn County 17 kmPolk County 21 kmBradley County 22 kmMeigs County 30 kmMonroe County 43 kmRhea County 45 kmHamilton County 50 kmMurray County 53 kmFannin County 55 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 1.5 (md)
Depth
16 km below the surface
Felt
no reports yet
Nearest
McMinn County, 17 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1514 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 35.2727, -84.6670. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
McMinn County, TN 17 km (11 mi) SSW of here earthquakes near McMinn County
Polk County, TN 21 km (13 mi) NNW of here earthquakes near Polk County
Bradley County, TN 22 km (14 mi) NE of here earthquakes near Bradley County
Meigs County, TN 30 km (19 mi) SSE of here earthquakes near Meigs County
Monroe County, TN 43 km (26 mi) WSW of here earthquakes near Monroe County
Rhea County, TN 45 km (28 mi) SE of here earthquakes near Rhea County

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

Aftershocks so far

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

  1. 1.8 4 km WSW of Decatur, Tennessee
  2. 2.0 3 km ESE of Etowah, Tennessee
  3. 1.8 8 km E of Englewood, Tennessee
  4. 1.9 11 km SW of Tellico Plains, Tennessee
  5. 1.6 9 km NNW of Tellico Plains, Tennessee
  6. 2.0 15 km ESE of Wildwood Lake, Tennessee
  7. 1.9 1 km E of Collegedale, Tennessee
  8. 1.6 2 km E of Tellico Plains, Tennessee
  9. 1.7 14 km E of Benton, Tennessee
  10. 2.0 0 km S of Niota, Tennessee
  11. 1.5 2 km NNW of Madisonville, Tennessee
  12. 1.7 5 km E of Niota, Tennessee
  13. 2.4 7 km E of Etowah, Tennessee
  14. 2.2 7 km ENE of Niota, Tennessee
  15. 2.0 10 km NNW of Dayton, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2018-12-12 — it released about 22,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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