QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

7 km ENE of Union City, Oklahoma

· 12 km deep · released about 46 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Canadian County 18 kmGrady County 44 kmOklahoma County 44 kmCaddo County 54 kmCleveland County 55 kmMcClain County 58 kmKingfisher County 60 kmLogan County 67 kmBlaine 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 2.1 (ml)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Canadian County, 18 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1576 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 46 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 330,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 21× the energy of this one
  4. This earthquake M 2.1 about 46 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 35.4148, -97.8682. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Canadian County, OK 18 km (11 mi) SE of here earthquakes near Canadian County
Grady County, OK 44 km (27 mi) N of here earthquakes near Grady County
Oklahoma County, OK 44 km (28 mi) WSW of here earthquakes near Oklahoma County
Caddo County, OK 54 km (34 mi) ENE of here earthquakes near Caddo County
Cleveland County, OK 55 km (34 mi) WNW of here earthquakes near Cleveland County
McClain County, OK 58 km (36 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

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

  1. 1.8 5 km ENE of Minco, Oklahoma
  2. 1.7 4 km E of Minco, Oklahoma
  3. 1.6 2 km NE of Minco, Oklahoma
  4. 1.6 5 km ENE of Minco, Oklahoma
  5. 1.9 4 km E of Minco, Oklahoma
  6. 1.7 5 km ENE of Minco, Oklahoma
  7. 1.7 9 km ESE of Chickasha, Oklahoma
  8. 1.9 10 km ESE of Chickasha, Oklahoma
  9. 2.2 11 km ESE of Chickasha, Oklahoma
  10. 1.7 10 km ESE of Chickasha, Oklahoma
  11. 1.7 11 km ESE of Chickasha, Oklahoma
  12. 1.7 6 km NNE of Newcastle, Oklahoma
  13. 1.6 5 km SW of Bridge Creek, Oklahoma
  14. 1.6 5 km WSW of Bridge Creek, Oklahoma
  15. 1.6 5 km WSW 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.