QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

10 km NNW of Foster, Oklahoma

· 14 km deep · released about 85 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Garvin County 21 kmMcClain County 36 kmStephens County 38 kmGrady County 48 kmMurray County 49 kmCarter County 55 kmCleveland County 60 kmJefferson County 72 kmPontotoc County 78 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 2.3 (ml)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Garvin County, 21 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 521 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 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 85 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 34.7012, -97.5412. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Garvin County, OK 21 km (13 mi) W of here earthquakes near Garvin County
McClain County, OK 36 km (22 mi) SSW of here earthquakes near McClain County
Stephens County, OK 38 km (23 mi) NE of here earthquakes near Stephens County
Grady County, OK 48 km (30 mi) SE of here earthquakes near Grady County
Murray County, OK 49 km (31 mi) WNW of here earthquakes near Murray County
Carter County, OK 55 km (34 mi) NNW of here earthquakes near Carter 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. 1.6 6 km ESE of Loco, Oklahoma
  2. 2.3 9 km NW of Healdton, Oklahoma
  3. 2.0 9 km NW of Healdton, Oklahoma
  4. 2.0 10 km NW of Healdton, Oklahoma
  5. 1.8 9 km NW of Healdton, Oklahoma
  6. 1.7 9 km E of Loco, Oklahoma
  7. 2.6 9 km ESE of Loco, Oklahoma
  8. 1.9 9 km NW of Healdton, Oklahoma
  9. 2.3 9 km WNW of Healdton, Oklahoma
  10. 2.4 10 km ESE of Loco, Oklahoma
  11. 1.9 10 km ESE of Loco, Oklahoma
  12. 1.7 10 km ESE of Loco, Oklahoma
  13. 1.7 10 km ESE of Loco, Oklahoma
  14. 1.5 2 km SE of Erin Springs, Oklahoma
  15. 1.6 7 km SE of Ratliff City, 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.