QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

16 km W of Union City, Oklahoma

· 7.9 km deep · released about 480 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Canadian County 23 kmCaddo County 33 kmGrady County 45 kmBlaine County 62 kmKingfisher County 66 kmOklahoma County 68 kmMcClain County 73 kmCleveland County 75 kmWashita County 80 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 2.8 (ml)
Depth
7.9 km below the surface
Felt
no reports yet
Nearest
Canadian County, 23 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2879 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 480 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 32,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 2× the energy of this one
  4. This earthquake M 2.8 about 480 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 35.3747, -98.1213. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Canadian County, OK 23 km (14 mi) SW of here earthquakes near Canadian County
Caddo County, OK 33 km (20 mi) NE of here earthquakes near Caddo County
Grady County, OK 45 km (28 mi) NNW of here earthquakes near Grady County
Blaine County, OK 62 km (39 mi) SSE of here earthquakes near Blaine County
Kingfisher County, OK 66 km (41 mi) SSW of here earthquakes near Kingfisher County
Oklahoma County, OK 68 km (42 mi) WSW of here earthquakes near Oklahoma County

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

Aftershocks so far

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

  1. 2.7 3 km S of Amber, Oklahoma
  2. 2.6 6 km SSE of Amber, Oklahoma
  3. 3.0 6 km SSE of Amber, Oklahoma
  4. 2.2 7 km S of Amber, Oklahoma
  5. 2.3 4 km S of Amber, Oklahoma
  6. 2.1 6 km S of Amber, Oklahoma
  7. 2.2 4 km SW of Tuttle, Oklahoma
  8. 2.5 5 km S of Amber, Oklahoma
  9. 2.4 5 km S of Amber, Oklahoma
  10. 2.7 5 km S of Amber, Oklahoma
  11. 2.5 10 km S of Okarche, Oklahoma
  12. 2.4 5 km SW of Tuttle, Oklahoma
  13. 2.3 7 km WSW of Tuttle, Oklahoma
  14. 2.3 5 km WSW of Tuttle, Oklahoma
  15. 2.1 6 km WSW of Tuttle, 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.