QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

4 km NW of Ridgely, Tennessee

· 7.7 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 6 kmPemiscot County 26 kmDyer County 28 kmObion County 34 kmNew Madrid County 36 kmFulton County 41 kmDunklin County 51 kmLauderdale County 60 kmGibson County 62 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
7.7 km below the surface
Felt
no reports yet
Nearest
Lake County, 6 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 958 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 14 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 36.2910, -89.5180. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, TN 6 km (3 mi) SSW of here earthquakes near Lake County
Pemiscot County, MO 26 km (16 mi) ENE of here earthquakes near Pemiscot County
Dyer County, TN 28 km (18 mi) NNW of here earthquakes near Dyer County
Obion County, TN 34 km (21 mi) WSW of here earthquakes near Obion County
New Madrid County, MO 36 km (22 mi) SSE of here earthquakes near New Madrid County
Fulton County, KY 41 km (26 mi) SW of here earthquakes near Fulton County

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

Aftershocks so far

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

  1. 1.6 4 km WSW of Howardville, Missouri
  2. 1.8 9 km N of New Madrid, Missouri
  3. 2.1 8 km S of Ridgely, Tennessee
  4. 2.0 8 km ENE of Steele, Missouri
  5. 1.7 4 km ESE of Ridgely, Tennessee
  6. 1.8 9 km S of Ridgely, Tennessee
  7. 2.7 7 km NNE of Blytheville, Arkansas
  8. 1.6 7 km S of Ridgely, Tennessee
  9. 1.6 9 km NW of Ridgely, Tennessee
  10. 1.7 5 km E of Marston, Missouri
  11. 1.7 3 km WNW of Marston, Missouri
  12. 1.7 9 km ESE of Marston, Missouri
  13. 1.8 3 km WNW of Marston, Missouri
  14. 1.6 3 km NNE of Ridgely, Tennessee
  15. 2.0 1 km W 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.