QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

7 km W of Buffalo, Oklahoma

· 4.0 km deep · released about 950 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harper County 7 kmClark County 44 kmComanche County 56 kmWoodward County 61 kmBeaver County 69 kmEllis County 69 kmMeade County 72 kmWoods County 77 kmLipscomb County 80 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 3.0 (ml)
Depth
4.0 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
Harper County, 7 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3183 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 350,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 950 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 36.8430, -99.7192. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harper County, OK 7 km (4 mi) NW of here earthquakes near Harper County
Clark County, KS 44 km (28 mi) S of here earthquakes near Clark County
Comanche County, KS 56 km (35 mi) SW of here earthquakes near Comanche County
Woodward County, OK 61 km (38 mi) NW of here earthquakes near Woodward County
Beaver County, OK 69 km (43 mi) E of here earthquakes near Beaver County
Ellis County, OK 69 km (43 mi) N of here earthquakes near Ellis 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. 1.7 15 km ENE of Fort Supply, Oklahoma
  2. 1.8 11 km NNE of May, Oklahoma
  3. 1.7 9 km NNE of May, Oklahoma
  4. 1.8 10 km NNE of May, Oklahoma
  5. 1.6 15 km SW of Freedom, Oklahoma
  6. 1.9 23 km WSW of Freedom, Oklahoma
  7. 1.6 17 km ESE of Buffalo, Oklahoma
  8. 2.2 26 km NE of Buffalo, Oklahoma
  9. 1.7 12 km N of Rosston, Oklahoma
  10. 2.3 11 km NNE of Rosston, Oklahoma
  11. 1.9 12 km N of Rosston, Oklahoma
  12. 2.2 11 km NNE of Rosston, Oklahoma
  13. 2.5 10 km NNE of Rosston, Oklahoma
  14. 2.5 11 km NNE of Rosston, Oklahoma
  15. 2.3 13 km NNE of Rosston, 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.