QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

9 km SSE of Ridgely, Tennessee

· 11 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Dyer County 15 kmLake County 17 kmPemiscot County 29 kmObion County 35 kmFulton County 48 kmLauderdale County 49 kmNew Madrid County 49 kmCrockett County 50 kmGibson 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
11 km below the surface
Felt
no reports yet
Nearest
Dyer County, 15 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1068 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 13 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 5.7 810,000× the energy of this one
  3. Around the size people start to feel M 3.0 72× the energy of this one
  4. This earthquake M 1.8 about 13 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 36.1792, -89.4622. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dyer County, TN 15 km (9 mi) NNW of here earthquakes near Dyer County
Lake County, TN 17 km (11 mi) S of here earthquakes near Lake County
Pemiscot County, MO 29 km (18 mi) E of here earthquakes near Pemiscot County
Obion County, TN 35 km (22 mi) SW of here earthquakes near Obion County
Fulton County, KY 48 km (30 mi) SSW of here earthquakes near Fulton County
Lauderdale County, TN 49 km (30 mi) NNE of here earthquakes near Lauderdale County

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

Aftershocks so far

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

  1. 2.4 4 km NNW of Ridgely, Tennessee
  2. 1.5 4 km NW of Marston, Missouri
  3. 1.6 3 km ENE of Marston, Missouri
  4. 1.6 4 km E of Caruthersville, Missouri
  5. 1.6 3 km WNW of Marston, Missouri
  6. 1.5 3 km WNW of Marston, Missouri
  7. 1.7 4 km ENE of North Lilbourn, Missouri
  8. 2.3 0 km WSW of Howardville, Missouri
  9. 1.6 2 km NW of Ridgely, Tennessee
  10. 1.8 4 km NW of Ridgely, Tennessee
  11. 1.6 2 km NW of Ridgely, Tennessee
  12. 2.0 0 km NNW of Cooter, Missouri
  13. 1.6 2 km NW of Ridgely, Tennessee
  14. 1.9 0 km NNW of Howardville, Missouri
  15. 2.0 8 km SW of Tiptonville, 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.