QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

11 km SSE of Ridgely, Tennessee

· 8.5 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Dyer County 14 kmLake County 19 kmObion County 32 kmPemiscot County 33 kmFulton County 47 kmCrockett County 47 kmGibson County 48 kmLauderdale County 50 kmNew Madrid 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 1.8 (md)
Depth
8.5 km below the surface
Felt
no reports yet
Nearest
Dyer County, 14 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 128 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 16 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 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 36.1758, -89.4170. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dyer County, TN 14 km (8 mi) N of here earthquakes near Dyer County
Lake County, TN 19 km (12 mi) SSE of here earthquakes near Lake County
Obion County, TN 32 km (20 mi) SW of here earthquakes near Obion County
Pemiscot County, MO 33 km (21 mi) E of here earthquakes near Pemiscot County
Fulton County, KY 47 km (29 mi) SSW of here earthquakes near Fulton County
Crockett County, TN 47 km (29 mi) NNW of here earthquakes near Crockett 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. 1.6 7 km E of Hayward, Missouri
  2. 1.7 2 km NNE of Howardville, Missouri
  3. 1.6 7 km SE of Marston, Missouri
  4. 2.0 7 km S of Ridgely, Tennessee
  5. 1.8 6 km NW of Ridgely, Tennessee
  6. 1.7 4 km NW of Marston, Missouri
  7. 1.7 7 km NW of Ridgely, Tennessee
  8. 1.7 5 km W of Tiptonville, Tennessee
  9. 1.7 7 km ESE of Marston, Missouri
  10. 1.8 3 km ENE of Marston, Missouri
  11. 1.8 3 km ENE of Marston, Missouri
  12. 1.9 5 km ENE of Marston, Missouri
  13. 2.1 6 km NW of Tiptonville, Tennessee
  14. 1.9 1 km N of Marston, Missouri
  15. 2.0 5 km NE of Caruthersville, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.0 on 2026-04-23 — it released about 1,900 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.