QuakeIndex

Earthquake · automatic estimate, may change

M 2.3ml

9 km NNW of Velma, Oklahoma

· 7.0 km deep · released about 72 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Stephens County 16 kmGarvin County 40 kmCarter County 49 kmJefferson County 50 kmGrady County 56 kmMcClain County 57 kmMurray County 58 kmCotton County 68 kmComanche County 73 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
7.0 km below the surface
Felt
no reports yet
Nearest
Stephens County, 16 km WSW
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 1237 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 72 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 5.8 210,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 150,000× the energy of this one
  3. Around the size people start to feel M 3.0 13× the energy of this one
  4. This earthquake M 2.3 about 72 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 34.5413, -97.6962. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Stephens County, OK 16 km (10 mi) ENE of here earthquakes near Stephens County
Garvin County, OK 40 km (25 mi) WSW of here earthquakes near Garvin County
Carter County, OK 49 km (31 mi) NW of here earthquakes near Carter County
Jefferson County, OK 50 km (31 mi) NNE of here earthquakes near Jefferson County
Grady County, OK 56 km (35 mi) SSE of here earthquakes near Grady County
McClain County, OK 57 km (36 mi) SSW of here earthquakes near McClain 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. 2.0 8 km W of Velma, Oklahoma
  2. 1.9 7 km WNW of Velma, Oklahoma
  3. 2.1 7 km W of Velma, Oklahoma
  4. 1.8 9 km SE of Dibble, Oklahoma
  5. 3.7 9 km WNW of Velma, Oklahoma
  6. 1.7 9 km SE of Dibble, Oklahoma
  7. 1.8 9 km WNW of Velma, Oklahoma
  8. 1.9 8 km WNW of Velma, Oklahoma
  9. 1.6 9 km SE of Dibble, Oklahoma
  10. 3.0 8 km WNW of Velma, Oklahoma
  11. 1.8 10 km WNW of Velma, Oklahoma
  12. 2.0 9 km WNW of Velma, Oklahoma
  13. 2.0 10 km WNW of Velma, Oklahoma
  14. 2.0 9 km WNW of Velma, Oklahoma
  15. 2.2 8 km WNW of Velma, 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.