QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

4 km E of Union City, Oklahoma

· 5.7 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Canadian County 18 kmGrady County 42 kmOklahoma County 47 kmCaddo County 51 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 1.7 (ml)
Depth
5.7 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Canadian County, 18 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1569 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 12 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 900,000× the energy of this one
  3. Around the size people start to feel M 3.0 80× the energy of this one
  4. This earthquake M 1.7 about 12 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 35.3963, -97.8878. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Canadian County, OK 18 km (11 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 47 km (29 mi) WSW of here earthquakes near Oklahoma County
Caddo County, OK 51 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

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

  1. 2.4 5 km ENE of Minco, Oklahoma
  2. 1.5 2 km NNE of Bridge Creek, Oklahoma
  3. 1.6 2 km NE of Bridge Creek, Oklahoma
  4. 1.5 6 km NW of Tuttle, Oklahoma
  5. 2.1 9 km ENE of Ninnekah, Oklahoma
  6. 2.5 5 km E of Minco, Oklahoma
  7. 1.8 4 km E of Minco, Oklahoma
  8. 1.8 5 km ENE of Minco, Oklahoma
  9. 1.7 4 km E of Minco, Oklahoma
  10. 1.6 2 km NE of Minco, Oklahoma
  11. 1.6 5 km ENE of Minco, Oklahoma
  12. 1.9 4 km E of Minco, Oklahoma
  13. 1.7 5 km ENE of Minco, Oklahoma
  14. 1.7 9 km ESE of Chickasha, Oklahoma
  15. 1.9 10 km ESE of Chickasha, 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.