QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

1 km NNE of Ridgely, Tennessee

· 7.7 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 6 kmDyer County 26 kmPemiscot County 28 kmObion County 31 kmNew Madrid County 38 kmFulton County 40 kmDunklin County 54 kmGibson County 59 kmLauderdale County 59 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
7.7 km below the surface
Felt
no reports yet
Nearest
Lake County, 6 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1248 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 15 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 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 36.2788, -89.4807. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, TN 6 km (4 mi) S of here earthquakes near Lake County
Dyer County, TN 26 km (16 mi) NNW of here earthquakes near Dyer County
Pemiscot County, MO 28 km (18 mi) ENE of here earthquakes near Pemiscot County
Obion County, TN 31 km (19 mi) WSW of here earthquakes near Obion County
New Madrid County, MO 38 km (24 mi) SSE of here earthquakes near New Madrid County
Fulton County, KY 40 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

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

  1. 1.7 7 km SE of Marston, Missouri
  2. 1.6 5 km NW of Marston, Missouri
  3. 2.1 2 km NW of Marston, Missouri
  4. 1.6 1 km SW of Howardville, Missouri
  5. 1.6 7 km SE of Marston, Missouri
  6. 1.6 3 km W of Tiptonville, Tennessee
  7. 1.7 6 km NNW of Ridgely, Tennessee
  8. 2.5 9 km SE of New Madrid, Missouri
  9. 1.5 southeastern Missouri
  10. 1.7 9 km NW of Tiptonville, Tennessee
  11. 1.8 7 km N of New Madrid, Missouri
  12. 1.7 5 km ENE of Caruthersville, Missouri
  13. 1.6 6 km NNW of Ridgely, Tennessee
  14. 1.9 7 km ENE of Steele, Missouri
  15. 1.8 3 km WNW 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.

On USGS

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