QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

9 km S of Ridgely, Tennessee

· 12 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Dyer County 16 kmLake County 17 kmPemiscot County 27 kmObion County 37 kmLauderdale County 48 kmNew Madrid County 49 kmFulton County 50 kmDunklin County 51 kmCrockett 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
12 km below the surface
Felt
no reports yet
Nearest
Dyer County, 16 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 838 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 36.1773, -89.4925. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dyer County, TN 16 km (10 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 27 km (17 mi) E of here earthquakes near Pemiscot County
Obion County, TN 37 km (23 mi) WSW of here earthquakes near Obion County
Lauderdale County, TN 48 km (30 mi) NNE of here earthquakes near Lauderdale County
New Madrid County, MO 49 km (30 mi) SSE of here earthquakes near New Madrid 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. 1.8 3 km NNE of Ridgely, Tennessee
  2. 1.8 7 km NNW of Ridgely, Tennessee
  3. 2.0 2 km SE of Howardville, Missouri
  4. 2.3 1 km ESE of Howardville, Missouri
  5. 2.5 2 km SSW of Ridgely, Tennessee
  6. 1.7 1 km W of Howardville, Missouri
  7. 1.7 9 km ESE of Marston, Missouri
  8. 1.7 3 km ESE of Ridgely, Tennessee
  9. 1.6 8 km ESE of Marston, Missouri
  10. 1.6 6 km SE of Marston, Missouri
  11. 2.0 5 km E of Marston, Missouri
  12. 1.7 6 km ESE of Marston, Missouri
  13. 2.2 6 km SE of Marston, Missouri
  14. 2.3 6 km SE of Marston, Missouri
  15. 1.6 7 km SE 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.