QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

8 km ENE of Greenfield, Oklahoma

· 6.4 km deep · released about 60 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Blaine County 18 kmCanadian County 37 kmKingfisher County 39 kmCuster County 65 kmMajor County 65 kmCaddo County 66 kmDewey County 69 kmLogan County 78 kmWashita County 82 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 (ml)
Depth
6.4 km below the surface
Felt
no reports yet
Nearest
Blaine County, 18 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3030 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 35.7594, -98.2948. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Blaine County, OK 18 km (11 mi) SE of here earthquakes near Blaine County
Canadian County, OK 37 km (23 mi) NW of here earthquakes near Canadian County
Kingfisher County, OK 39 km (24 mi) WSW of here earthquakes near Kingfisher County
Custer County, OK 65 km (40 mi) ENE of here earthquakes near Custer County
Major County, OK 65 km (41 mi) SSE of here earthquakes near Major County
Caddo County, OK 66 km (41 mi) N of here earthquakes near Caddo County

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

Aftershocks so far

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

  1. 1.6 2 km SW of Okarche, Oklahoma
  2. 2.8 9 km NE of Thomas, Oklahoma
  3. 3.0 10 km E of Kingfisher, Oklahoma
  4. 2.9 15 km W of Union City, Oklahoma
  5. 2.6 3 km NNE of Okarche, Oklahoma
  6. 3.0 4 km NNE of Okeene, Oklahoma
  7. 2.8 16 km W of Union City, Oklahoma
  8. 2.6 16 km W of Union City, Oklahoma
  9. 2.5 15 km W of Union City, Oklahoma
  10. 2.1 7 km SSE of El Reno, Oklahoma
  11. 2.6 15 km W of Union City, Oklahoma
  12. 2.1 8 km NNE of Union City, Oklahoma
  13. 2.7 5 km NNE of Okeene, Oklahoma
  14. 2.5 14 km W of Union City, Oklahoma
  15. 2.5 9 km SSE of Ames, 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.