QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

3 km SSW of Chickasha, Oklahoma

· 6.4 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grady County 7 kmCaddo County 42 kmMcClain County 46 kmCanadian County 58 kmStephens County 61 kmCleveland County 61 kmComanche County 62 kmGarvin County 69 kmOklahoma County 77 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 2.6 (ml)
Depth
6.4 km below the surface
Felt
no reports yet
Nearest
Grady County, 7 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 244 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 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 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 35.0235, -97.9600. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grady County, OK 7 km (4 mi) W of here earthquakes near Grady County
Caddo County, OK 42 km (26 mi) ESE of here earthquakes near Caddo County
McClain County, OK 46 km (29 mi) W of here earthquakes near McClain County
Canadian County, OK 58 km (36 mi) S of here earthquakes near Canadian County
Stephens County, OK 61 km (38 mi) N of here earthquakes near Stephens County
Cleveland County, OK 61 km (38 mi) WSW of here earthquakes near Cleveland County

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

Aftershocks so far

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

  1. 1.9 17 km ESE of Hinton, Oklahoma
  2. 2.2 16 km ENE of Lookeba, Oklahoma
  3. 1.6 15 km ESE of Hinton, Oklahoma
  4. 1.6 16 km ENE of Lookeba, Oklahoma
  5. 1.8 15 km ENE of Lookeba, Oklahoma
  6. 1.9 16 km ENE of Lookeba, Oklahoma
  7. 2.5 4 km SW of Cole, Oklahoma
  8. 2.1 2 km NE of Dibble, Oklahoma
  9. 2.8 2 km NE of Dibble, Oklahoma
  10. 1.9 2 km NE of Dibble, Oklahoma
  11. 2.4 2 km NE of Dibble, Oklahoma
  12. 2.0 2 km NE of Dibble, Oklahoma
  13. 1.8 2 km NNE of Dibble, Oklahoma
  14. 1.6 2 km NNE of Dibble, Oklahoma
  15. 1.5 17 km W of Union City, 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.