QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

9 km NW of Union City, Oklahoma

· 5.0 km deep · released about 46 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Canadian County 12 kmCaddo County 44 kmGrady County 48 kmKingfisher County 57 kmOklahoma County 57 kmBlaine County 61 kmCleveland County 69 kmMcClain County 70 kmLogan County 74 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
5.0 km below the surface
Felt
3 reports · strongest reported intensity IV
Nearest
Canadian County, 12 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 609 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.

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 35.4405, -98.0255. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Canadian County, OK 12 km (8 mi) SSW of here earthquakes near Canadian County
Caddo County, OK 44 km (28 mi) NE of here earthquakes near Caddo County
Grady County, OK 48 km (30 mi) NNW of here earthquakes near Grady County
Kingfisher County, OK 57 km (36 mi) S of here earthquakes near Kingfisher County
Oklahoma County, OK 57 km (36 mi) WSW of here earthquakes near Oklahoma County
Blaine County, OK 61 km (38 mi) SE of here earthquakes near Blaine County

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

Aftershocks so far

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

  1. 1.5 3 km ESE of Tuttle, Oklahoma
  2. 1.7 4 km SE of Tuttle, Oklahoma
  3. 1.6 8 km NNW of Union City, Oklahoma
  4. 1.5 4 km WNW of Bridge Creek, Oklahoma
  5. 1.9 3 km NW of Bridge Creek, Oklahoma
  6. 1.7 3 km WNW of Bridge Creek, Oklahoma
  7. 1.5 2 km NW of Bridge Creek, Oklahoma
  8. 2.0 4 km WNW of Bridge Creek, Oklahoma
  9. 1.6 4 km WNW of Bridge Creek, Oklahoma
  10. 2.2 3 km WNW of Bridge Creek, Oklahoma
  11. 1.6 4 km WNW of Bridge Creek, Oklahoma
  12. 1.6 4 km WNW of Bridge Creek, Oklahoma
  13. 1.7 4 km WNW of Bridge Creek, Oklahoma
  14. 2.1 2 km WNW of Bridge Creek, Oklahoma
  15. 1.6 3 km WNW 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.