QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

3 km ENE of Ridgely, Tennessee

· 6.5 km deep · released about 1.2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 8 kmDyer County 25 kmObion County 28 kmPemiscot County 31 kmFulton County 39 kmNew Madrid County 41 kmGibson County 55 kmDunklin County 57 kmCrockett County 58 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 3.3 (md)
Depth
6.5 km below the surface
Felt
27 reports · strongest reported intensity V
Measured shaking
intensity IV (ShakeMap)
Nearest
Lake County, 8 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2713 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 27 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 140,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,200× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,400× the energy of this one
  4. This earthquake M 3.3 about 1.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.5× more

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 36.2715, -89.4448. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, TN 8 km (5 mi) SSE of here earthquakes near Lake County
Dyer County, TN 25 km (15 mi) N of here earthquakes near Dyer County
Obion County, TN 28 km (18 mi) WSW of here earthquakes near Obion County
Pemiscot County, MO 31 km (19 mi) ENE of here earthquakes near Pemiscot County
Fulton County, KY 39 km (24 mi) SW of here earthquakes near Fulton County
New Madrid County, MO 41 km (25 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

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

  1. 2.3 4 km N of North Lilbourn, Missouri
  2. 1.6 13 km WNW of Newbern, Tennessee
  3. 1.8 7 km SE of Marston, Missouri
  4. 2.1 4 km E of Marston, Missouri
  5. 1.5 4 km SW of Tiptonville, Tennessee
  6. 2.2 4 km E of Steele, Missouri
  7. 1.6 9 km SSE of New Madrid, Missouri
  8. 1.5 5 km NNE of New Madrid, Missouri
  9. 1.5 11 km N of Dyersburg, Tennessee
  10. 1.6 2 km NE of Ridgely, Tennessee
  11. 2.9 1 km SSW of Howardville, Missouri
  12. 2.0 6 km ESE of Marston, Missouri
  13. 1.7 6 km ESE of Marston, Missouri
  14. 1.9 10 km SSE of Ridgely, Tennessee
  15. 1.8 5 km W 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.