QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

7 km SE of Dudley, Missouri

· 7.7 km deep · released about 77 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Stoddard County 14 kmButler County 34 kmNew Madrid County 37 kmScott County 53 kmClay County 55 kmWayne County 56 kmPemiscot County 63 kmBollinger County 64 kmMississippi County 65 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 2.3 (md)
Depth
7.7 km below the surface
Felt
no reports yet
Nearest
Stoddard County, 14 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1681 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 77 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 140,000× the energy of this one
  3. Around the size people start to feel M 3.0 12× the energy of this one
  4. This earthquake M 2.3 about 77 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 36.7467, -90.0240. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Stoddard County, MO 14 km (8 mi) SSW of here earthquakes near Stoddard County
Butler County, MO 34 km (21 mi) E of here earthquakes near Butler County
New Madrid County, MO 37 km (23 mi) WNW of here earthquakes near New Madrid County
Scott County, MO 53 km (33 mi) SW of here earthquakes near Scott County
Clay County, AR 55 km (34 mi) NE of here earthquakes near Clay County
Wayne County, MO 56 km (35 mi) SE of here earthquakes near Wayne County

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

Aftershocks so far

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

  1. 1.7 2 km S of Howardville, Missouri
  2. 1.6 1 km NNE of Marston, Missouri
  3. 2.0 3 km SSE of Matthews, Missouri
  4. 2.0 5 km ESE of Howardville, Missouri
  5. 1.8 0 km ENE of Howardville, Missouri
  6. 1.9 2 km NNW of Marston, Missouri
  7. 1.8 5 km WNW of Marston, Missouri
  8. 1.7 3 km ENE of Lilbourn, Missouri
  9. 1.6 7 km N of New Madrid, Missouri
  10. 1.9 6 km E of Marston, Missouri
  11. 1.7 2 km NNE of Marston, Missouri
  12. 1.6 4 km ENE of Marston, Missouri
  13. 2.4 12 km SSE of Williamsville, Missouri
  14. 2.7 11 km SE of Williamsville, Missouri
  15. 1.7 4 km NNW of New Madrid, 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 2021-11-18 — it released about 390 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.