QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

6 km NNE of Union City, Oklahoma

· 15 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Canadian County 13 kmOklahoma County 46 kmGrady County 47 kmCaddo County 53 kmKingfisher County 56 kmCleveland County 59 kmMcClain County 63 kmLogan County 66 kmBlaine 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 1.8 (ml)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Canadian County, 13 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2589 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 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× the energy of this one
  4. This earthquake M 1.8 about 13 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 35.4428, -97.9008. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Canadian County, OK 13 km (8 mi) SSE of here earthquakes near Canadian County
Oklahoma County, OK 46 km (29 mi) WSW of here earthquakes near Oklahoma County
Grady County, OK 47 km (29 mi) N of here earthquakes near Grady County
Caddo County, OK 53 km (33 mi) NE of here earthquakes near Caddo County
Kingfisher County, OK 56 km (35 mi) S of here earthquakes near Kingfisher County
Cleveland County, OK 59 km (36 mi) WNW of here earthquakes near Cleveland County

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

Aftershocks so far

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

  1. 1.8 6 km NE of Union City, Oklahoma
  2. 1.6 2 km SSW of Minco, Oklahoma
  3. 2.0 8 km NE of El Reno, Oklahoma
  4. 1.5 10 km ENE of El Reno, Oklahoma
  5. 1.7 1 km SE of Minco, Oklahoma
  6. 2.0 1 km SSW of Minco, Oklahoma
  7. 2.3 3 km S of Minco, Oklahoma
  8. 2.1 1 km SSE of Minco, Oklahoma
  9. 2.4 2 km S of Minco, Oklahoma
  10. 1.6 14 km WSW of Kingfisher, Oklahoma
  11. 2.4 9 km W of Dibble, Oklahoma
  12. 2.0 15 km WSW of Kingfisher, Oklahoma
  13. 1.9 14 km WSW of Kingfisher, Oklahoma
  14. 1.9 15 km WSW of Kingfisher, Oklahoma
  15. 2.2 3 km SSE of Minco, 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.