QuakeIndex

quarry blast · reviewed by a seismologist

M 1.8ml

7 km SW of Ada, Oklahoma

· 0.0 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pontotoc County 3 kmMurray County 41 kmCoal County 43 kmJohnston County 46 kmSeminole County 50 kmGarvin County 54 kmHughes County 57 kmPottawatomie County 59 kmAtoka County 73 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
Pontotoc County, 3 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1451 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 14 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 34.7212, -96.7233. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pontotoc County, OK 3 km (2 mi) W of here earthquakes near Pontotoc County
Murray County, OK 41 km (26 mi) NE of here earthquakes near Murray County
Coal County, OK 43 km (27 mi) WNW of here earthquakes near Coal County
Johnston County, OK 46 km (28 mi) N of here earthquakes near Johnston County
Seminole County, OK 50 km (31 mi) SSW of here earthquakes near Seminole County
Garvin County, OK 54 km (33 mi) E of here earthquakes near Garvin County

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

Aftershocks so far

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

  1. 1.5 Oklahoma
  2. 1.6 4 km SW of Mill Creek, Oklahoma
  3. 1.8 7 km NW of Davis, Oklahoma
  4. 1.7 4 km WSW of Mill Creek, Oklahoma
  5. 1.6 8 km SSE of Hickory, Oklahoma
  6. 1.6 3 km S of Mill Creek, Oklahoma
  7. 1.5 1 km SSW of Mill Creek, Oklahoma
  8. 1.6 4 km WSW of Mill Creek, Oklahoma
  9. 1.7 6 km WSW of Mill Creek, Oklahoma
  10. 1.7 5 km WSW of Mill Creek, Oklahoma
  11. 1.6 4 km WSW of Mill Creek, Oklahoma
  12. 1.8 2 km WSW of Mill Creek, Oklahoma
  13. 1.6 3 km SW of Mill Creek, Oklahoma
  14. 1.6 6 km N of Mill Creek, Oklahoma
  15. 1.6 3 km SW 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.