QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

11 km SSW of Ridgely, Tennessee

· 4.4 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Dyer County 16 kmLake County 19 kmPemiscot County 25 kmObion County 40 kmLauderdale County 46 kmDunklin County 49 kmNew Madrid County 50 kmCrockett County 51 kmFulton County 52 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
4.4 km below the surface
Felt
no reports yet
Nearest
Dyer County, 16 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2899 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 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× 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 36.1627, -89.5133. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dyer County, TN 16 km (10 mi) NW of here earthquakes near Dyer County
Lake County, TN 19 km (12 mi) S of here earthquakes near Lake County
Pemiscot County, MO 25 km (16 mi) ESE of here earthquakes near Pemiscot County
Obion County, TN 40 km (25 mi) SW of here earthquakes near Obion County
Lauderdale County, TN 46 km (28 mi) NNE of here earthquakes near Lauderdale County
Dunklin County, MO 49 km (31 mi) E of here earthquakes near Dunklin County

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

Aftershocks so far

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

  1. 1.6 13 km WNW of Newbern, Tennessee
  2. 1.8 7 km SE of Marston, Missouri
  3. 2.1 4 km E of Marston, Missouri
  4. 1.5 4 km SW of Tiptonville, Tennessee
  5. 2.2 4 km E of Steele, Missouri
  6. 1.6 9 km SSE of New Madrid, Missouri
  7. 1.5 11 km N of Dyersburg, Tennessee
  8. 1.6 2 km NE of Ridgely, Tennessee
  9. 2.9 1 km SSW of Howardville, Missouri
  10. 2.0 6 km ESE of Marston, Missouri
  11. 1.7 6 km ESE of Marston, Missouri
  12. 1.9 10 km SSE of Ridgely, Tennessee
  13. 1.8 5 km W of Ridgely, Tennessee
  14. 1.9 9 km SW of Caruthersville, Missouri
  15. 2.2 4 km NNW of Ridgely, 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.