QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

13 km NNE of Bray, Oklahoma

· 18 km deep · released about 18 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Stephens County 31 kmGrady County 32 kmMcClain County 41 kmGarvin County 41 kmCleveland County 65 kmComanche County 66 kmMurray County 70 kmCarter County 70 kmJefferson County 72 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 1.9 (ml)
Depth
18 km below the surface
Felt
no reports yet
Nearest
Stephens County, 31 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 53 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 18 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 840,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 600,000× the energy of this one
  3. Around the size people start to feel M 3.0 53× the energy of this one
  4. This earthquake M 1.9 about 18 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 34.7487, -97.7623. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Stephens County, OK 31 km (19 mi) NNE of here earthquakes near Stephens County
Grady County, OK 32 km (20 mi) SSE of here earthquakes near Grady County
McClain County, OK 41 km (26 mi) SW of here earthquakes near McClain County
Garvin County, OK 41 km (26 mi) W of here earthquakes near Garvin County
Cleveland County, OK 65 km (40 mi) SW of here earthquakes near Cleveland County
Comanche County, OK 66 km (41 mi) E of here earthquakes near Comanche County

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

Aftershocks so far

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

  1. 1.3 5 km ESE of Chickasha, Oklahoma
  2. 0.9 5 km SE of Chickasha, Oklahoma
  3. 3.3 2 km SSW of Dibble, Oklahoma
  4. 1.6 1 km S of Dibble, Oklahoma
  5. 1.5 2 km SW of Dibble, Oklahoma
  6. 2.0 1 km SW of Dibble, Oklahoma
  7. 1.9 4 km SE of Ratliff City, Oklahoma
  8. 1.7 2 km SE of Ratliff City, Oklahoma
  9. 1.8 6 km SE of Chickasha, Oklahoma
  10. 1.6 5 km ESE of Velma, Oklahoma
  11. 1.8 5 km ESE of Velma, Oklahoma
  12. 1.6 7 km ESE of Velma, Oklahoma
  13. 1.7 12 km NNE of Bray, Oklahoma
  14. 1.8 12 km NNE of Bray, Oklahoma
  15. 1.9 12 km NNE of Bray, 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.