QuakeIndex

quarry blast · reviewed by a seismologist

M 1.7ml

8 km S of Wapanucka, Oklahoma

· 0.0 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Johnston County 21 kmCoal County 34 kmAtoka County 37 kmBryan County 40 kmMarshall County 44 kmPontotoc County 53 kmMurray County 63 kmGrayson County 79 kmCarter 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 1.7 (ml)
Depth
0.0 km below the surface
Felt
no reports yet
Nearest
Johnston County, 21 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2118 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 970,000× the energy of this one
  3. Around the size people start to feel M 3.0 86× the energy of this one
  4. This earthquake M 1.7 about 11 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 34.2998, -96.4213. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Johnston County, OK 21 km (13 mi) E of here earthquakes near Johnston County
Coal County, OK 34 km (21 mi) SSW of here earthquakes near Coal County
Atoka County, OK 37 km (23 mi) WSW of here earthquakes near Atoka County
Bryan County, OK 40 km (25 mi) NNW of here earthquakes near Bryan County
Marshall County, OK 44 km (27 mi) NE of here earthquakes near Marshall County
Pontotoc County, OK 53 km (33 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

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

  1. 1.8 3 km SE of Mill Creek, Oklahoma
  2. 1.7 3 km WSW of Mill Creek, Oklahoma
  3. 1.5 3 km SW of Mill Creek, Oklahoma
  4. 1.6 4 km SW of Mill Creek, Oklahoma
  5. 2.2 3 km SW of Mill Creek, Oklahoma
  6. 1.6 8 km SSE of Wapanucka, Oklahoma
  7. 1.6 4 km S of Mill Creek, Oklahoma
  8. 1.6 3 km WSW of Mill Creek, Oklahoma
  9. 1.5 2 km SSE of Mill Creek, Oklahoma
  10. 1.7 4 km SW of Mill Creek, Oklahoma
  11. 1.5 7 km N of Mill Creek, Oklahoma
  12. 1.7 5 km WSW of Mill Creek, Oklahoma
  13. 2.1 3 km SW of Mill Creek, Oklahoma
  14. 2.0 3 km SW of Mill Creek, Oklahoma
  15. 1.6 1 km SSE of Mill Creek, 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.