QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

5 km NW of Cromwell, Oklahoma

· 6.0 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Okfuskee County 18 kmSeminole County 26 kmHughes County 42 kmPottawatomie County 46 kmLincoln County 51 kmOkmulgee County 56 kmCreek County 60 kmMcIntosh County 74 kmPontotoc County 75 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
6.0 km below the surface
Felt
no reports yet
Nearest
Okfuskee County, 18 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2627 days ago

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

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 5.8 870,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 620,000× the energy of this one
  3. Around the size people start to feel M 3.0 55× 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 35.3755, -96.4913. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Okfuskee County, OK 18 km (11 mi) SW of here earthquakes near Okfuskee County
Seminole County, OK 26 km (16 mi) NNE of here earthquakes near Seminole County
Hughes County, OK 42 km (26 mi) NNW of here earthquakes near Hughes County
Pottawatomie County, OK 46 km (29 mi) ENE of here earthquakes near Pottawatomie County
Lincoln County, OK 51 km (32 mi) SE of here earthquakes near Lincoln County
Okmulgee County, OK 56 km (35 mi) WSW of here earthquakes near Okmulgee County

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

Aftershocks so far

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

  1. 1.6 5 km N of Stroud, Oklahoma
  2. 1.5 5 km N of Stroud, Oklahoma
  3. 2.1 5 km N of Stroud, Oklahoma
  4. 2.0 5 km N of Stroud, Oklahoma
  5. 1.8 5 km N of Stroud, Oklahoma
  6. 1.9 5 km N of Stroud, Oklahoma
  7. 3.0 9 km WNW of Prague, Oklahoma
  8. 2.2 8 km NW of Prague, Oklahoma
  9. 2.0 5 km N of Stroud, Oklahoma
  10. 1.9 5 km NNE of Stroud, Oklahoma
  11. 1.7 6 km SSE of Yeager, Oklahoma
  12. 2.2 5 km N of Stroud, Oklahoma
  13. 1.7 12 km SSE of Slick, Oklahoma
  14. 2.0 4 km NE of Davenport, Oklahoma
  15. 1.5 5 km N of Stroud, 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.