QuakeIndex

quarry blast · reviewed by a seismologist

M 1.8ml

9 km NNE of Cooperton, Oklahoma

· 0.0 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kiowa County 14 kmWashita County 40 kmComanche County 46 kmCaddo County 48 kmTillman County 65 kmGreer County 65 kmJackson County 66 kmCuster County 79 kmCotton County 85 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 1.8 (ml)
Depth
0.0 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Kiowa County, 14 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1641 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.

USGS catalogues this as quarry blast, not an earthquake.

How big was it?

This earthquake released about 14 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 34.9505, -98.8373. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kiowa County, OK 14 km (8 mi) ENE of here earthquakes near Kiowa County
Washita County, OK 40 km (25 mi) SSE of here earthquakes near Washita County
Comanche County, OK 46 km (29 mi) NW of here earthquakes near Comanche County
Caddo County, OK 48 km (30 mi) WSW of here earthquakes near Caddo County
Tillman County, OK 65 km (40 mi) N of here earthquakes near Tillman County
Greer County, OK 65 km (41 mi) E of here earthquakes near Greer County

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

Aftershocks so far

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

  1. 1.8 9 km NNE of Friendship, Oklahoma
  2. 1.5 3 km NNE of Cooperton, Oklahoma
  3. 1.5 6 km NW of Medicine Park, Oklahoma
  4. 1.6 4 km N of Cooperton, Oklahoma
  5. 1.6 6 km NE of Cooperton, Oklahoma
  6. 1.6 7 km NNE of Cooperton, Oklahoma
  7. 1.8 4 km NE of Medicine Park, Oklahoma
  8. 1.5 3 km NE of Medicine Park, Oklahoma
  9. 1.5 5 km E of Medicine Park, Oklahoma
  10. 2.1 8 km SSW of Roosevelt, Oklahoma
  11. 2.1 6 km SW of Medicine Park, Oklahoma
  12. 1.6 6 km NNE of Cooperton, Oklahoma
  13. 1.5 Oklahoma
  14. 2.8 1 km ESE of Medicine Park, Oklahoma
  15. 1.7 6 km NW of Cooperton, 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.