QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

8 km S of Byron, Oklahoma

· 5.0 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alfalfa County 12 kmGrant County 44 kmHarper County 44 kmWoods County 53 kmBarber County 57 kmMajor County 62 kmGarfield County 67 kmKingman County 81 kmSumner County 83 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
5.0 km below the surface
Felt
no reports yet
Nearest
Alfalfa County, 12 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3721 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 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 36.8307, -98.2792. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alfalfa County, OK 12 km (7 mi) NNE of here earthquakes near Alfalfa County
Grant County, OK 44 km (27 mi) W of here earthquakes near Grant County
Harper County, KS 44 km (27 mi) SSW of here earthquakes near Harper County
Woods County, OK 53 km (33 mi) ENE of here earthquakes near Woods County
Barber County, KS 57 km (35 mi) SE of here earthquakes near Barber County
Major County, OK 62 km (39 mi) NNE of here earthquakes near Major County

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

Aftershocks so far

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

  1. 2.6 3 km W of Pond Creek, Oklahoma
  2. 2.6 8 km SE of Byron, Oklahoma
  3. 1.8 7 km E of Manchester, Oklahoma
  4. 1.9 4 km NNE of Anthony, Kansas
  5. 1.5 12 km NW of Renfrow, Oklahoma
  6. 2.8 4 km NNE of Cherokee, Oklahoma
  7. 1.7 6 km E of Manchester, Oklahoma
  8. 1.6 7 km E of Manchester, Oklahoma
  9. 1.6 6 km S of Anthony, Kansas
  10. 2.9 7 km SE of Manchester, Oklahoma
  11. 2.3 4 km NNE of Anthony, Kansas
  12. 2.9 3 km WSW of Aline, Oklahoma
  13. 2.0 8 km SSE of Anthony, Kansas
  14. 2.6 6 km SSE of Manchester, Oklahoma
  15. 1.6 7 km SW of Bluff City, Kansas

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.