QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

6 km WNW of Buffalo, Oklahoma

· 5.3 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 6 kmClark County 44 kmComanche County 54 kmWoodward County 61 kmEllis County 70 kmBeaver County 71 kmMeade County 73 kmWoods County 76 kmLipscomb 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 2.1 (ml)
Depth
5.3 km below the surface
Felt
no reports yet
Nearest
Harper County, 6 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3022 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 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 36.8517, -99.6972. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, OK 6 km (4 mi) NNW of here earthquakes near Harper County
Clark County, KS 44 km (27 mi) SSE of here earthquakes near Clark County
Comanche County, KS 54 km (34 mi) SW of here earthquakes near Comanche County
Woodward County, OK 61 km (38 mi) NW of here earthquakes near Woodward County
Ellis County, OK 70 km (43 mi) N of here earthquakes near Ellis County
Beaver County, OK 71 km (44 mi) E of here earthquakes near Beaver County

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

Aftershocks so far

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

  1. 1.8 14 km SE of Buffalo, Oklahoma
  2. 1.6 5 km NNE of Fort Supply, Oklahoma
  3. 1.6 10 km NNE of May, Oklahoma
  4. 1.9 9 km SW of Englewood, Kansas
  5. 1.8 9 km W of Buffalo, Oklahoma
  6. 1.5 24 km ENE of Buffalo, Oklahoma
  7. 1.9 24 km NE of Buffalo, Oklahoma
  8. 1.7 25 km NE of Buffalo, Oklahoma
  9. 1.9 20 km NNE of Woodward, Oklahoma
  10. 1.8 8 km N of Knowles, Oklahoma
  11. 1.7 10 km S of Buffalo, Oklahoma
  12. 1.5 5 km N of Buffalo, Oklahoma
  13. 1.6 16 km E of Buffalo, Oklahoma
  14. 2.0 20 km WNW of Freedom, Oklahoma
  15. 2.3 16 km E of Buffalo, 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.