QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

1 km SE of Breckinridge, Oklahoma

· 6.8 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Garfield County 8 kmGrant County 40 kmNoble County 44 kmKingfisher County 57 kmLogan County 62 kmAlfalfa County 63 kmKay County 67 kmMajor County 75 kmPayne 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 2.9 (ml)
Depth
6.8 km below the surface
Felt
4 reports · strongest reported intensity IV
Nearest
Garfield County, 8 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1517 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 36.4292, -97.7222. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Garfield County, OK 8 km (5 mi) NE of here earthquakes near Garfield County
Grant County, OK 40 km (25 mi) S of here earthquakes near Grant County
Noble County, OK 44 km (27 mi) W of here earthquakes near Noble County
Kingfisher County, OK 57 km (35 mi) NNE of here earthquakes near Kingfisher County
Logan County, OK 62 km (39 mi) NNW of here earthquakes near Logan County
Alfalfa County, OK 63 km (39 mi) ESE of here earthquakes near Alfalfa 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. 3.0 8 km ESE of Pond Creek, Oklahoma
  2. 2.6 5 km NNW of Ames, Oklahoma
  3. 3.2 4 km NE of Meno, Oklahoma
  4. 2.8 8 km ESE of Pond Creek, Oklahoma
  5. 2.6 2 km NNE of Douglas, Oklahoma
  6. 2.1 7 km S of Perry, Oklahoma
  7. 2.8 9 km W of Lamont, Oklahoma
  8. 2.6 7 km NNW of Hunter, Oklahoma
  9. 2.8 9 km SSW of Marshall, Oklahoma
  10. 3.3 7 km NNW of Hunter, Oklahoma
  11. 3.5 5 km W of Lucien, Oklahoma
  12. 2.8 8 km S of Perry, Oklahoma
  13. 2.8 3 km NNE of Meno, Oklahoma
  14. 3.1 10 km ENE of Perry, Oklahoma
  15. 3.3 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.