QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

4 km W of Bridge Creek, Oklahoma

· 5.9 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grady County 26 kmCanadian County 38 kmMcClain County 40 kmCleveland County 42 kmOklahoma County 49 kmCaddo County 54 kmGarvin County 74 kmPottawatomie County 76 kmKingfisher 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 1.8 (ml)
Depth
5.9 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Grady County, 26 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 509 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

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 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× 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 35.2433, -97.7887. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grady County, OK 26 km (16 mi) NNE of here earthquakes near Grady County
Canadian County, OK 38 km (23 mi) SSE of here earthquakes near Canadian County
McClain County, OK 40 km (25 mi) NW of here earthquakes near McClain County
Cleveland County, OK 42 km (26 mi) W of here earthquakes near Cleveland County
Oklahoma County, OK 49 km (30 mi) SW of here earthquakes near Oklahoma County
Caddo County, OK 54 km (34 mi) E of here earthquakes near Caddo 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. 1.7 7 km ENE of Calumet, Oklahoma
  2. 1.9 7 km ENE of Calumet, Oklahoma
  3. 2.0 6 km E of Calumet, Oklahoma
  4. 1.5 6 km ENE of Calumet, Oklahoma
  5. 1.6 6 km SSW of Bradley, Oklahoma
  6. 1.8 8 km ENE of Calumet, Oklahoma
  7. 1.5 7 km ENE of Calumet, Oklahoma
  8. 1.6 8 km ENE of Calumet, Oklahoma
  9. 1.5 6 km ENE of Calumet, Oklahoma
  10. 1.7 6 km SSW of Bradley, Oklahoma
  11. 2.5 6 km SSW of Bradley, Oklahoma
  12. 1.9 2 km SSW of Dibble, Oklahoma
  13. 1.6 6 km ENE of Amber, Oklahoma
  14. 1.5 12 km NNW of Alex, Oklahoma
  15. 1.5 6 km SE of Amber, 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.