QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2mb_lg

1 km ENE of Union City, Oklahoma

· 4.3 km deep · released about 60 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Canadian County 17 kmGrady County 42 kmCaddo County 49 kmOklahoma County 50 kmCleveland County 58 kmMcClain County 60 kmKingfisher County 62 kmBlaine County 70 kmLogan County 72 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 2.2 (mb_lg)
Depth
4.3 km below the surface
Felt
no reports yet
Nearest
Canadian County, 17 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2602 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 60 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 250,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 60 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 35.3959, -97.9237. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Canadian County, OK 17 km (11 mi) SSE of here earthquakes near Canadian County
Grady County, OK 42 km (26 mi) N of here earthquakes near Grady County
Caddo County, OK 49 km (30 mi) ENE of here earthquakes near Caddo County
Oklahoma County, OK 50 km (31 mi) WSW of here earthquakes near Oklahoma County
Cleveland County, OK 58 km (36 mi) WNW of here earthquakes near Cleveland County
McClain County, OK 60 km (37 mi) NW of here earthquakes near McClain County

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

Aftershocks so far

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

  1. 1.7 0 km N of Bridge Creek, Oklahoma
  2. 1.7 6 km WNW of Dibble, Oklahoma
  3. 1.8 11 km NW of Edmond, Oklahoma
  4. 1.6 3 km SE of Minco, Oklahoma
  5. 2.2 Oklahoma
  6. 1.6 2 km S of Blanchard, Oklahoma
  7. 1.7 10 km W of Dibble, Oklahoma
  8. 1.7 11 km NW of Edmond, Oklahoma
  9. 2.5 2 km WNW of Bridge Creek, Oklahoma
  10. 2.2 6 km W of Bridge Creek, Oklahoma
  11. 2.1 1 km NW of Bridge Creek, Oklahoma
  12. 2.6 2 km WSW of Bridge Creek, Oklahoma
  13. 2.5 2 km NW of Bridge Creek, Oklahoma
  14. 2.0 1 km WNW of Bridge Creek, Oklahoma
  15. 1.6 1 km NW of Bridge Creek, 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.