QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6mb_lg

4 km N of Union City, Oklahoma

· 5.0 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Canadian County 12 kmGrady County 46 kmCaddo County 50 kmOklahoma County 50 kmKingfisher County 57 kmCleveland County 62 kmMcClain County 65 kmBlaine County 66 kmLogan County 69 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 2.6 (mb_lg)
Depth
5.0 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
Canadian County, 12 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3471 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 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 35.4361, -97.9431. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Canadian County, OK 12 km (8 mi) SSE of here earthquakes near Canadian County
Grady County, OK 46 km (29 mi) N of here earthquakes near Grady County
Caddo County, OK 50 km (31 mi) NE of here earthquakes near Caddo County
Oklahoma County, OK 50 km (31 mi) WSW of here earthquakes near Oklahoma County
Kingfisher County, OK 57 km (35 mi) S of here earthquakes near Kingfisher County
Cleveland County, OK 62 km (38 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

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

  1. 2.8 11 km N of Alex, Oklahoma
  2. 2.5 9 km NE of Ninnekah, Oklahoma
  3. 2.6 8 km NE of Pocasset, Oklahoma
  4. 2.4 4 km W of Okarche, Oklahoma
  5. 2.6 9 km SW of Yukon, Oklahoma
  6. 2.4 3 km W of Tuttle, Oklahoma
  7. 3.2 8 km ENE of Calumet, Oklahoma
  8. 2.4 5 km S of Tuttle, Oklahoma
  9. 2.9 4 km SSE of Tuttle, Oklahoma
  10. 3.2 5 km WSW of Tuttle, Oklahoma
  11. 2.3 8 km SE of El Reno, Oklahoma
  12. 2.7 6 km SW of Okarche, Oklahoma
  13. 2.3 6 km SW of Okarche, Oklahoma
  14. 2.5 9 km ENE of Calumet, 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.