QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

18 km W of Union City, Oklahoma

· 7.1 km deep · released about 82 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Canadian County 22 kmCaddo County 34 kmGrady County 49 kmBlaine County 59 kmKingfisher County 64 kmOklahoma County 69 kmMcClain County 76 kmCleveland County 78 kmWashita 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
7.1 km below the surface
Felt
4 reports · strongest reported intensity IV
Nearest
Canadian County, 22 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 86 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 82 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 12× the energy of this one
  4. This earthquake M 2.3 about 82 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 35.4040, -98.1445. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Canadian County, OK 22 km (13 mi) SW of here earthquakes near Canadian County
Caddo County, OK 34 km (21 mi) NE of here earthquakes near Caddo County
Grady County, OK 49 km (30 mi) NNW of here earthquakes near Grady County
Blaine County, OK 59 km (36 mi) SSE of here earthquakes near Blaine County
Kingfisher County, OK 64 km (39 mi) SSW of here earthquakes near Kingfisher County
Oklahoma County, OK 69 km (43 mi) WSW of here earthquakes near Oklahoma County

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

Aftershocks so far

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

  1. 1.3 5 km ESE of Chickasha, Oklahoma
  2. 0.9 5 km SE of Chickasha, Oklahoma
  3. 0.9 9 km ESE of Hinton, Oklahoma
  4. 1.5 9 km ESE of Hinton, Oklahoma
  5. 1.0 6 km E of Calumet, Oklahoma
  6. 1.3 6 km E of Calumet, Oklahoma
  7. 1.9 6 km E of Calumet, Oklahoma
  8. 1.8 7 km ENE of Calumet, Oklahoma
  9. 2.6 6 km E of Calumet, Oklahoma
  10. 1.9 6 km ENE of Calumet, Oklahoma
  11. 1.8 6 km SE of Chickasha, Oklahoma
  12. 1.6 9 km SSE of Amber, Oklahoma
  13. 1.6 5 km SSE of Amber, Oklahoma
  14. 2.4 6 km S of Amber, Oklahoma
  15. 1.7 7 km ENE of Gracemont, 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.