QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

15 km W of Union City, Oklahoma

· 5.2 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Canadian County 20 kmCaddo County 35 kmGrady County 47 kmBlaine County 61 kmKingfisher County 64 kmOklahoma County 66 kmMcClain County 74 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 2.9 (ml)
Depth
5.2 km below the surface
Felt
7 reports · strongest reported intensity III
Nearest
Canadian County, 20 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2928 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 7 people have reported feeling it to USGS.

How big was it?

This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 35.3960, -98.1159. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Canadian County, OK 20 km (13 mi) SW of here earthquakes near Canadian County
Caddo County, OK 35 km (22 mi) NE of here earthquakes near Caddo County
Grady County, OK 47 km (29 mi) NNW of here earthquakes near Grady County
Blaine County, OK 61 km (38 mi) SSE of here earthquakes near Blaine County
Kingfisher County, OK 64 km (40 mi) SSW of here earthquakes near Kingfisher County
Oklahoma County, OK 66 km (41 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

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

  1. 2.4 5 km SW of Tuttle, Oklahoma
  2. 2.0 15 km W of Union City, Oklahoma
  3. 2.5 11 km ESE of Watonga, Oklahoma
  4. 1.6 2 km SW of Okarche, Oklahoma
  5. 2.7 4 km W of Bridge Creek, Oklahoma
  6. 3.0 4 km W of Bridge Creek, Oklahoma
  7. 2.9 15 km W of Union City, Oklahoma
  8. 2.4 4 km ENE of Tuttle, Oklahoma
  9. 3.3 1 km W of Bridge Creek, Oklahoma
  10. 2.6 3 km NNE of Okarche, Oklahoma
  11. 2.5 1 km E of Bridge Creek, Oklahoma
  12. 1.8 0 km SSW of Bridge Creek, Oklahoma
  13. 2.3 0 km SSE of Bridge Creek, Oklahoma
  14. 2.4 0 km SE of Bridge Creek, Oklahoma
  15. 2.3 0 km ESE 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.