QuakeIndex

quarry blast · reviewed by a seismologist

M 1.8ml

3 km S of Caddo, Oklahoma

· 0.0 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Bryan County 15 kmAtoka County 39 kmJohnston County 43 kmMarshall County 47 kmCoal County 54 kmFannin County 58 kmGrayson County 65 kmChoctaw County 66 kmPontotoc 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
0.0 km below the surface
Felt
no reports yet
Nearest
Bryan County, 15 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1098 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 15 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 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× the energy of this one
  4. This earthquake M 1.8 about 15 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 34.0982, -96.2645. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Bryan County, OK 15 km (9 mi) N of here earthquakes near Bryan County
Atoka County, OK 39 km (24 mi) SSW of here earthquakes near Atoka County
Johnston County, OK 43 km (27 mi) ESE of here earthquakes near Johnston County
Marshall County, OK 47 km (29 mi) E of here earthquakes near Marshall County
Coal County, OK 54 km (34 mi) S of here earthquakes near Coal County
Fannin County, TX 58 km (36 mi) NNW of here earthquakes near Fannin County

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

Aftershocks so far

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

  1. 1.5 9 km SSE of Wapanucka, Oklahoma
  2. 1.5 6 km SSE of Tishomingo, Oklahoma
  3. 1.6 10 km SSE of Wapanucka, Oklahoma
  4. 1.5 9 km SSE of Wapanucka, Oklahoma
  5. 1.5 4 km W of Durant, Oklahoma
  6. 1.6 2 km NNW of Durant, Oklahoma
  7. 1.7 1 km WSW of Durant, Oklahoma
  8. 2.0 2 km SW of Durant, Oklahoma
  9. 2.4 4 km WSW of Durant, Oklahoma
  10. 1.7 3 km SW of Armstrong, Oklahoma
  11. 1.7 3 km SW of Armstrong, Oklahoma
  12. 2.1 0 km SW of Durant, Oklahoma
  13. 1.6 12 km SSE of Wapanucka, Oklahoma
  14. 1.7 10 km SE of Wapanucka, Oklahoma
  15. 2.3 5 km SW of Stringtown, 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.