QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

5 km W of Arpelar, Oklahoma

· 2.3 km deep · released about 37 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hughes County 24 kmPittsburg County 26 kmCoal County 46 kmSeminole County 58 kmMcIntosh County 58 kmAtoka County 61 kmOkfuskee County 65 kmPontotoc County 65 kmLatimer County 69 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 (ml)
Depth
2.3 km below the surface
Felt
no reports yet
Nearest
Hughes County, 24 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1091 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 37 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 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 34.9388, -96.0293. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hughes County, OK 24 km (15 mi) ESE of here earthquakes near Hughes County
Pittsburg County, OK 26 km (16 mi) W of here earthquakes near Pittsburg County
Coal County, OK 46 km (29 mi) NNE of here earthquakes near Coal County
Seminole County, OK 58 km (36 mi) ESE of here earthquakes near Seminole County
McIntosh County, OK 58 km (36 mi) SW of here earthquakes near McIntosh County
Atoka County, OK 61 km (38 mi) N of here earthquakes near Atoka County

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

Aftershocks so far

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

  1. 2.5 4 km ENE of Wardville, Oklahoma
  2. 2.9 4 km ENE of Wardville, Oklahoma
  3. 2.0 5 km ENE of Wardville, Oklahoma
  4. 2.1 5 km ENE of Wardville, Oklahoma
  5. 2.7 4 km ENE of Wardville, Oklahoma
  6. 1.8 4 km NE of Wardville, Oklahoma
  7. 1.5 4 km ENE of Wardville, Oklahoma
  8. 1.8 5 km S of Savanna, Oklahoma
  9. 2.1 4 km S of Savanna, Oklahoma
  10. 1.6 5 km S of Savanna, Oklahoma
  11. 1.8 5 km S of Savanna, Oklahoma
  12. 1.6 4 km S of Savanna, Oklahoma
  13. 1.6 13 km SSW of Indianola, Oklahoma
  14. 1.8 14 km NNE of Arpelar, Oklahoma
  15. 1.6 14 km SSW of Indianola, Oklahoma

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.