QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

8 km NE of Bradley, Oklahoma

· 9.7 km deep · released about 19 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N McClain County 20 kmGrady County 25 kmGarvin County 38 kmCleveland County 42 kmStephens County 54 kmPottawatomie County 69 kmMurray County 71 kmOklahoma County 72 kmCaddo 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 1.9 (ml)
Depth
9.7 km below the surface
Felt
no reports yet
Nearest
McClain County, 20 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 124 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 19 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 5.8 810,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 580,000× the energy of this one
  3. Around the size people start to feel M 3.0 51× the energy of this one
  4. This earthquake M 1.9 about 19 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 34.9295, -97.6363. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
McClain County, OK 20 km (12 mi) WSW of here earthquakes near McClain County
Grady County, OK 25 km (16 mi) ESE of here earthquakes near Grady County
Garvin County, OK 38 km (24 mi) NW of here earthquakes near Garvin County
Cleveland County, OK 42 km (26 mi) SW of here earthquakes near Cleveland County
Stephens County, OK 54 km (33 mi) NNE of here earthquakes near Stephens County
Pottawatomie County, OK 69 km (43 mi) WSW of here earthquakes near Pottawatomie County

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

Aftershocks so far

28 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. 1.5 0 km SSW of Newcastle, Oklahoma
  8. 1.8 6 km SE of Chickasha, Oklahoma
  9. 1.7 12 km NNE of Bray, Oklahoma
  10. 1.8 12 km NNE of Bray, Oklahoma
  11. 1.9 12 km NNE of Bray, Oklahoma
  12. 1.8 11 km NNE of Bray, Oklahoma
  13. 1.5 10 km NNE of Bray, Oklahoma
  14. 1.9 12 km NNE of Bray, Oklahoma
  15. 1.6 11 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.