QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

9 km NW of Pocasset, Oklahoma

· 7.4 km deep · released about 530 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grady County 29 kmCanadian County 32 kmCaddo County 34 kmMcClain County 59 kmCleveland County 64 kmOklahoma County 65 kmComanche County 78 kmKingfisher County 78 kmBlaine County 78 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 2.8 (ml)
Depth
7.4 km below the surface
Felt
7 reports · strongest reported intensity VI
Nearest
Grady County, 29 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1324 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 7 people have reported feeling it to USGS.

How big was it?

This earthquake released about 530 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 29,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 20,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.8× the energy of this one
  4. This earthquake M 2.8 about 530 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 35.2555, -98.0275. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grady County, OK 29 km (18 mi) NNW of here earthquakes near Grady County
Canadian County, OK 32 km (20 mi) S of here earthquakes near Canadian County
Caddo County, OK 34 km (21 mi) ENE of here earthquakes near Caddo County
McClain County, OK 59 km (37 mi) WNW of here earthquakes near McClain County
Cleveland County, OK 64 km (40 mi) W of here earthquakes near Cleveland County
Oklahoma County, OK 65 km (40 mi) WSW of here earthquakes near Oklahoma County

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

Aftershocks so far

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

  1. 1.7 Oklahoma
  2. 1.8 2 km N of Cole, Oklahoma
  3. 2.0 10 km SSE of Calumet, Oklahoma
  4. 1.7 9 km SSE of Calumet, Oklahoma
  5. 1.7 9 km SSE of Calumet, Oklahoma
  6. 1.6 9 km SSE of Calumet, Oklahoma
  7. 1.7 3 km N of Cole, Oklahoma
  8. 1.8 3 km N of Cole, Oklahoma
  9. 1.5 3 km NNW of Cole, Oklahoma
  10. 2.3 9 km SSE of Calumet, Oklahoma
  11. 1.8 10 km WSW of El Reno, Oklahoma
  12. 1.7 12 km S of Calumet, Oklahoma
  13. 1.5 11 km SSE of Calumet, Oklahoma
  14. 1.8 2 km SSE of Union City, Oklahoma
  15. 1.7 10 km SSE 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.