QuakeIndex

quarry blast · reviewed by a seismologist

M 1.8ml

3 km SSW of Mill Creek, Oklahoma

· 0.0 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Johnston County 18 kmMurray County 25 kmMarshall County 40 kmPontotoc County 40 kmCarter County 44 kmCoal County 55 kmGarvin County 57 kmLove County 60 kmBryan County 70 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, 18 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1782 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 17 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 5.8 900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 640,000× the energy of this one
  3. Around the size people start to feel M 3.0 57× the energy of this one
  4. This earthquake M 1.8 about 17 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 34.3788, -96.8377. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Johnston County, OK 18 km (11 mi) WNW of here earthquakes near Johnston County
Murray County, OK 25 km (15 mi) ESE of here earthquakes near Murray County
Marshall County, OK 40 km (25 mi) N of here earthquakes near Marshall County
Pontotoc County, OK 40 km (25 mi) SSW of here earthquakes near Pontotoc County
Carter County, OK 44 km (27 mi) ENE of here earthquakes near Carter County
Coal County, OK 55 km (34 mi) WSW of here earthquakes near Coal County

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

Aftershocks so far

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

  1. 1.6 4 km SW of Mill Creek, Oklahoma
  2. 1.6 10 km SSE of Wapanucka, Oklahoma
  3. 1.5 1 km SE of Mill Creek, Oklahoma
  4. 1.5 8 km NNE of Stonewall, Oklahoma
  5. 1.6 11 km SSE of Wapanucka, Oklahoma
  6. 1.5 7 km N of Mill Creek, Oklahoma
  7. 1.5 3 km WSW of Mill Creek, Oklahoma
  8. 1.5 9 km ESE of Ada, Oklahoma
  9. 1.9 6 km SW of Ada, Oklahoma
  10. 2.1 8 km SSW of Wynnewood, Oklahoma
  11. 2.0 8 km SSW of Wynnewood, Oklahoma
  12. 1.5 11 km SE of Katie, Oklahoma
  13. 1.6 1 km S of Mill Creek, Oklahoma
  14. 1.9 7 km N of Mill Creek, Oklahoma
  15. 1.6 3 km WSW 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.