QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

9 km SE of Ridgely, Tennessee

· 7.4 km deep · released about 49 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 16 kmDyer County 17 kmObion County 28 kmPemiscot County 34 kmFulton County 43 kmNew Madrid County 48 kmGibson County 49 kmCrockett County 50 kmLauderdale County 54 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 2.1 (md)
Depth
7.4 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
Lake County, 16 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 505 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 49 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 310,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 220,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 49 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 36.2103, -89.4022. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, TN 16 km (10 mi) SSE of here earthquakes near Lake County
Dyer County, TN 17 km (11 mi) N of here earthquakes near Dyer County
Obion County, TN 28 km (18 mi) SW of here earthquakes near Obion County
Pemiscot County, MO 34 km (21 mi) E of here earthquakes near Pemiscot County
Fulton County, KY 43 km (26 mi) SSW of here earthquakes near Fulton County
New Madrid County, MO 48 km (30 mi) SSE of here earthquakes near New Madrid 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. 1.8 5 km ESE of Marston, Missouri
  2. 2.5 5 km ENE of Steele, Missouri
  3. 2.0 2 km SE of Ridgely, Tennessee
  4. 2.1 6 km ENE of Steele, Missouri
  5. 1.5 2 km NE of Marston, Missouri
  6. 1.9 6 km SSW of Catron, Missouri
  7. 1.8 8 km NNW of Tiptonville, Tennessee
  8. 2.0 6 km NNW of Dyersburg, Tennessee
  9. 1.8 6 km ESE of Marston, Missouri
  10. 1.9 1 km NE of Howardville, Missouri
  11. 1.6 2 km SSE of Howardville, Missouri
  12. 1.7 5 km ESE of Marston, Missouri
  13. 2.4 6 km ENE of Steele, Missouri
  14. 1.9 5 km ESE of Ridgely, Tennessee
  15. 1.5 5 km ESE of Marston, Missouri

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.