QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

5 km E of Union City, Oklahoma

· 4.4 km deep · released about 8.1 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Canadian County 19 kmGrady County 42 kmOklahoma County 46 kmCaddo County 52 kmCleveland County 55 kmMcClain County 58 kmKingfisher County 62 kmLogan County 70 kmBlaine County 73 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 1.6 (ml)
Depth
4.4 km below the surface
Felt
no reports yet
Nearest
Canadian County, 19 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1633 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 8.1 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
  3. Around the size people start to feel M 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 8.1 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 35.3948, -97.8813. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Canadian County, OK 19 km (12 mi) SSE of here earthquakes near Canadian County
Grady County, OK 42 km (26 mi) N of here earthquakes near Grady County
Oklahoma County, OK 46 km (29 mi) WSW of here earthquakes near Oklahoma County
Caddo County, OK 52 km (32 mi) ENE of here earthquakes near Caddo County
Cleveland County, OK 55 km (34 mi) WNW of here earthquakes near Cleveland County
McClain County, OK 58 km (36 mi) NW of here earthquakes near McClain County

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

Aftershocks so far

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

  1. 1.7 1 km NNW of Bridge Creek, Oklahoma
  2. 2.4 1 km NNW of Bridge Creek, Oklahoma
  3. 1.5 1 km N of Bridge Creek, Oklahoma
  4. 2.7 Oklahoma
  5. 2.0 1 km N of Bridge Creek, Oklahoma
  6. 2.4 5 km ENE of Minco, Oklahoma
  7. 1.5 2 km NNE of Bridge Creek, Oklahoma
  8. 1.6 2 km NE of Bridge Creek, Oklahoma
  9. 1.7 3 km WSW of Washington, Oklahoma
  10. 1.5 6 km NW of Tuttle, Oklahoma
  11. 2.1 9 km ENE of Ninnekah, Oklahoma
  12. 2.5 5 km E of Minco, Oklahoma
  13. 1.8 4 km E of Minco, Oklahoma
  14. 1.8 5 km ENE of Minco, Oklahoma
  15. 1.7 4 km E of Minco, 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.