QuakeIndex

quarry blast · reviewed by a seismologist

M 1.8ml

12 km SSE of Wapanucka, Oklahoma

· 0.0 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Johnston County 27 kmAtoka County 32 kmCoal County 35 kmBryan County 36 kmMarshall County 47 kmPontotoc County 58 kmMurray County 69 kmGrayson County 78 kmChoctaw County 79 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
no reports yet
Nearest
Johnston County, 27 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1096 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

USGS catalogues this as quarry blast, not an earthquake.

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 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× 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 34.2768, -96.3615. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Johnston County, OK 27 km (17 mi) E of here earthquakes near Johnston County
Atoka County, OK 32 km (20 mi) WSW of here earthquakes near Atoka County
Coal County, OK 35 km (22 mi) S of here earthquakes near Coal County
Bryan County, OK 36 km (22 mi) NNW of here earthquakes near Bryan County
Marshall County, OK 47 km (29 mi) NE of here earthquakes near Marshall County
Pontotoc County, OK 58 km (36 mi) SSE of here earthquakes near Pontotoc County

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

Aftershocks so far

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

  1. 1.6 2 km SE of Stonewall, Oklahoma
  2. 1.5 9 km SSE of Wapanucka, Oklahoma
  3. 1.6 7 km N of Mill Creek, Oklahoma
  4. 1.5 13 km SSW of Stonewall, Oklahoma
  5. 1.5 6 km SSE of Tishomingo, Oklahoma
  6. 1.7 6 km SW of Stonewall, Oklahoma
  7. 1.6 10 km SSE of Wapanucka, Oklahoma
  8. 1.5 9 km SSE of Wapanucka, Oklahoma
  9. 1.5 4 km W of Durant, Oklahoma
  10. 1.6 2 km NNW of Durant, Oklahoma
  11. 1.7 1 km WSW of Durant, Oklahoma
  12. 1.7 5 km SE of Mill Creek, Oklahoma
  13. 2.0 2 km SW of Durant, Oklahoma
  14. 2.4 4 km WSW of Durant, Oklahoma
  15. 1.7 3 km SW of Armstrong, 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.