QuakeIndex

Earthquake · automatic estimate, may change

M 1.8ml

8 km SSW of Okarche, Oklahoma

· 2.5 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Canadian County 13 kmKingfisher County 33 kmBlaine County 45 kmOklahoma County 56 kmLogan County 58 kmCaddo County 64 kmGrady County 72 kmCleveland County 80 kmGarfield 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 1.8 (ml)
Depth
2.5 km below the surface
Felt
no reports yet
Nearest
Canadian County, 13 km SSE
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 397 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 16 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 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× the energy of this one
  4. This earthquake M 1.8 about 16 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 35.6567, -98.0164. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Canadian County, OK 13 km (8 mi) NNW of here earthquakes near Canadian County
Kingfisher County, OK 33 km (21 mi) SSW of here earthquakes near Kingfisher County
Blaine County, OK 45 km (28 mi) ESE of here earthquakes near Blaine County
Oklahoma County, OK 56 km (35 mi) WNW of here earthquakes near Oklahoma County
Logan County, OK 58 km (36 mi) WSW of here earthquakes near Logan County
Caddo County, OK 64 km (40 mi) NNE of here earthquakes near Caddo County

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

Aftershocks so far

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

  1. 2.1 2 km NNE of Minco, Oklahoma
  2. 1.7 1 km NNE of Minco, Oklahoma
  3. 1.5 2 km NE of Minco, Oklahoma
  4. 1.5 4 km ESE of Calumet, Oklahoma
  5. 2.0 6 km ENE of Calumet, Oklahoma
  6. 1.9 7 km ENE of Calumet, Oklahoma
  7. 1.6 7 km ENE of Calumet, Oklahoma
  8. 1.8 5 km E of Calumet, Oklahoma
  9. 1.7 6 km E of Calumet, Oklahoma
  10. 1.7 7 km ENE of Calumet, Oklahoma
  11. 1.5 7 km ENE of Calumet, Oklahoma
  12. 1.6 6 km E of Calumet, Oklahoma
  13. 1.5 7 km ENE of Calumet, Oklahoma
  14. 2.8 6 km E of Calumet, Oklahoma
  15. 1.9 5 km E of Calumet, 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.