QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

6 km NW of Ridgely, Tennessee

· 9.7 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 5 kmPemiscot County 25 kmDyer County 31 kmNew Madrid County 33 kmObion County 35 kmFulton County 41 kmDunklin County 50 kmMississippi County 61 kmLauderdale 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
9.7 km below the surface
Felt
no reports yet
Nearest
Lake County, 5 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 32 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 36.3122, -89.5353. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, TN 5 km (3 mi) WSW of here earthquakes near Lake County
Pemiscot County, MO 25 km (16 mi) ENE of here earthquakes near Pemiscot County
Dyer County, TN 31 km (19 mi) NNW of here earthquakes near Dyer County
New Madrid County, MO 33 km (21 mi) SSE of here earthquakes near New Madrid County
Obion County, TN 35 km (22 mi) W of here earthquakes near Obion County
Fulton County, KY 41 km (25 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

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

  1. 1.3 9 km SSE of Marston, Missouri
  2. 1.4 8 km NW of Tiptonville, Tennessee
  3. 2.1 7 km ENE of Steele, Missouri
  4. 1.8 8 km E of Ridgely, Tennessee
  5. 1.6 4 km NW of Marston, Missouri
  6. 1.8 0 km ESE of Risco, Missouri
  7. 1.7 2 km NNE of Ridgely, Tennessee
  8. 1.7 7 km NNW of Ridgely, Tennessee
  9. 1.8 1 km NNE of Marston, Missouri
  10. 1.7 4 km WSW of Howardville, Missouri
  11. 1.9 5 km NW of Ridgely, Tennessee
  12. 1.6 7 km E of Hayward, Missouri
  13. 1.7 2 km NNE of Howardville, Missouri
  14. 1.6 7 km SE of Marston, Missouri
  15. 2.0 7 km S 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.0 on 2026-04-23 — it released about 2,100 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.