QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

8 km WNW of Velma, Oklahoma

· 20 km deep · released about 85 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Stephens County 8 kmJefferson County 42 kmGarvin County 48 kmCarter County 51 kmCotton County 60 kmGrady County 61 kmMurray County 63 kmMcClain County 66 kmComanche County 68 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
20 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Stephens County, 8 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 912 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.

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 34.4817, -97.7637. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Stephens County, OK 8 km (5 mi) E of here earthquakes near Stephens County
Jefferson County, OK 42 km (26 mi) N of here earthquakes near Jefferson County
Garvin County, OK 48 km (30 mi) WSW of here earthquakes near Garvin County
Carter County, OK 51 km (31 mi) WNW of here earthquakes near Carter County
Cotton County, OK 60 km (37 mi) ENE of here earthquakes near Cotton County
Grady County, OK 61 km (38 mi) S of here earthquakes near Grady 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. 1.5 7 km SE of Katie, Oklahoma
  2. 2.6 8 km SE of Katie, Oklahoma
  3. 1.6 4 km SSW of Katie, Oklahoma
  4. 1.9 8 km SE of Katie, Oklahoma
  5. 1.5 13 km E of Rush Springs, Oklahoma
  6. 1.6 3 km N of Tatums, Oklahoma
  7. 1.8 13 km SW of Bradley, Oklahoma
  8. 1.8 13 km E of Rush Springs, Oklahoma
  9. 1.6 13 km SW of Bradley, Oklahoma
  10. 1.7 7 km WSW of Ratliff City, Oklahoma
  11. 1.9 7 km WSW of Ratliff City, Oklahoma
  12. 1.9 7 km WSW of Ratliff City, Oklahoma
  13. 2.1 6 km WSW of Ratliff City, Oklahoma
  14. 1.8 8 km SW of Ratliff City, Oklahoma
  15. 1.5 7 km WSW 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.