QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

6 km SSE of Ridgely, Tennessee

· 7.9 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 14 kmDyer County 18 kmPemiscot County 28 kmObion County 34 kmFulton County 46 kmNew Madrid County 46 kmLauderdale County 51 kmCrockett County 53 kmDunklin County 53 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
7.9 km below the surface
Felt
no reports yet
Nearest
Lake County, 14 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1495 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 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× 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 36.2062, -89.4715. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, TN 14 km (9 mi) S of here earthquakes near Lake County
Dyer County, TN 18 km (11 mi) NNW of here earthquakes near Dyer County
Pemiscot County, MO 28 km (18 mi) E of here earthquakes near Pemiscot County
Obion County, TN 34 km (21 mi) WSW of here earthquakes near Obion County
Fulton County, KY 46 km (29 mi) SSW of here earthquakes near Fulton County
New Madrid County, MO 46 km (29 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. 1.6 southeastern Missouri
  2. 2.4 7 km NNW of Ridgely, Tennessee
  3. 1.8 4 km WNW of Newbern, Tennessee
  4. 1.9 4 km WNW of Newbern, Tennessee
  5. 1.8 southeastern Missouri
  6. 2.1 4 km WNW of Marston, Missouri
  7. 1.5 3 km WSW of Ridgely, Tennessee
  8. 2.1 4 km SSW of Caruthersville, Missouri
  9. 1.8 7 km NNW of Ridgely, Tennessee
  10. 2.3 1 km E of Howardville, Missouri
  11. 1.5 4 km NW of Ridgely, Tennessee
  12. 1.8 4 km ENE of North Lilbourn, Missouri
  13. 1.8 southeastern Missouri
  14. 1.7 4 km WSW of Ridgely, Tennessee
  15. 1.7 2 km ESE of Lilbourn, 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.