QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

4 km SSW of Union City, Oklahoma

· 6.7 km deep · released about 7.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Canadian County 21 kmGrady County 38 kmCaddo County 43 kmOklahoma County 55 kmMcClain County 60 kmCleveland County 61 kmKingfisher County 66 kmBlaine County 72 kmLogan County 78 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
6.7 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Canadian County, 21 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 779 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 7.8 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 1,400,000× 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 7.8 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 35.3535, -97.9665. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Canadian County, OK 21 km (13 mi) S of here earthquakes near Canadian County
Grady County, OK 38 km (23 mi) N of here earthquakes near Grady County
Caddo County, OK 43 km (27 mi) ENE of here earthquakes near Caddo County
Oklahoma County, OK 55 km (34 mi) WSW of here earthquakes near Oklahoma County
McClain County, OK 60 km (37 mi) NW of here earthquakes near McClain County
Cleveland County, OK 61 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

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

  1. 1.9 5 km N of Verden, Oklahoma
  2. 1.6 1 km SSW of Cole, Oklahoma
  3. 1.8 0 km SSW of Cole, Oklahoma
  4. 1.9 1 km SW of Cole, Oklahoma
  5. 1.9 7 km N of Verden, Oklahoma
  6. 1.6 6 km N of Verden, Oklahoma
  7. 2.3 5 km NNE of Verden, Oklahoma
  8. 1.7 8 km WSW of El Reno, Oklahoma
  9. 1.9 10 km SW of El Reno, Oklahoma
  10. 1.8 9 km SW of El Reno, Oklahoma
  11. 1.6 9 km SW of El Reno, Oklahoma
  12. 1.5 10 km WSW of Dibble, Oklahoma
  13. 1.9 7 km NNW of Newcastle, Oklahoma
  14. 1.7 7 km NNW of Newcastle, Oklahoma
  15. 1.9 7 km NNW of Newcastle, 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.