QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

Oklahoma

· 8.4 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alfalfa County 24 kmGrant County 24 kmHarper County 48 kmGarfield County 49 kmMajor County 66 kmWoods County 72 kmSumner County 73 kmBarber County 76 kmKay County 82 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
8.4 km below the surface
Felt
no reports yet
Nearest
Alfalfa County, 24 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3533 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 36.7606, -98.0588. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alfalfa County, OK 24 km (15 mi) E of here earthquakes near Alfalfa County
Grant County, OK 24 km (15 mi) W of here earthquakes near Grant County
Harper County, KS 48 km (30 mi) S of here earthquakes near Harper County
Garfield County, OK 49 km (30 mi) NNW of here earthquakes near Garfield County
Major County, OK 66 km (41 mi) NE of here earthquakes near Major County
Woods County, OK 72 km (45 mi) E of here earthquakes near Woods County

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

Aftershocks so far

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

  1. 1.8 2 km E of Anthony, Kansas
  2. 2.6 9 km E of Manchester, Oklahoma
  3. 2.7 4 km NE of Meno, Oklahoma
  4. 3.6 8 km WSW of Deer Creek, Oklahoma
  5. 2.6 7 km SSE of Manchester, Oklahoma
  6. 2.6 4 km S of Renfrow, Oklahoma
  7. 4.0 4 km NNW of Medford, Oklahoma
  8. 2.7 8 km W of Deer Creek, Oklahoma
  9. 3.0 9 km ESE of Wakita, Oklahoma
  10. 2.7 5 km N of Lambert, Oklahoma
  11. 2.8 5 km NE of Medford, Oklahoma
  12. 2.5 4 km NNE of Lambert, Oklahoma
  13. 2.5 6 km S of Manchester, Oklahoma
  14. 1.6 11 km ESE of Bluff City, Kansas
  15. 2.7 7 km NNE of Wakita, 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.