QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

1 km ENE of Risco, Missouri

· 4.3 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N New Madrid County 13 kmStoddard County 35 kmLake County 38 kmPemiscot County 39 kmDunklin County 51 kmMississippi County 54 kmFulton County 55 kmButler County 57 kmScott 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 2.1 (md)
Depth
4.3 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
New Madrid County, 13 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3438 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 36.5613, -89.7988. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
New Madrid County, MO 13 km (8 mi) WSW of here earthquakes near New Madrid County
Stoddard County, MO 35 km (22 mi) SSE of here earthquakes near Stoddard County
Lake County, TN 38 km (23 mi) NW of here earthquakes near Lake County
Pemiscot County, MO 39 km (24 mi) N of here earthquakes near Pemiscot County
Dunklin County, MO 51 km (32 mi) NNE of here earthquakes near Dunklin County
Mississippi County, MO 54 km (33 mi) WSW of here earthquakes near Mississippi County

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

Aftershocks so far

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

  1. 1.7 4 km NW of Marston, Missouri
  2. 1.7 4 km WSW of Howardville, Missouri
  3. 2.9 4 km WSW of Howardville, Missouri
  4. 2.7 5 km ESE of Marston, Missouri
  5. 2.2 2 km NW of Marston, Missouri
  6. 1.5 8 km NW of Ridgely, Tennessee
  7. 3.2 8 km SSE of Marston, Missouri
  8. 2.3 10 km SSE of Matthews, Missouri
  9. 2.9 5 km WNW of Tiptonville, Tennessee
  10. 1.8 3 km WNW of Marston, Missouri
  11. 1.8 7 km WNW of Marston, Missouri
  12. 2.3 6 km SW of Caruthersville, Missouri
  13. 2.0 4 km N of Ridgely, Tennessee
  14. 3.0 4 km N of Ridgely, Tennessee
  15. 1.9 3 km NW 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.