QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

3 km SE of Marshall, Oklahoma

· 5.5 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Logan County 27 kmGarfield County 33 kmKingfisher County 37 kmNoble County 43 kmPayne County 56 kmOklahoma County 66 kmCanadian County 74 kmGrant County 75 kmLincoln 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
5.5 km below the surface
Felt
no reports yet
Nearest
Logan County, 27 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2001 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 16 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 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 36.1297, -97.5928. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Logan County, OK 27 km (17 mi) NNW of here earthquakes near Logan County
Garfield County, OK 33 km (20 mi) SSE of here earthquakes near Garfield County
Kingfisher County, OK 37 km (23 mi) ENE of here earthquakes near Kingfisher County
Noble County, OK 43 km (27 mi) SW of here earthquakes near Noble County
Payne County, OK 56 km (35 mi) W of here earthquakes near Payne County
Oklahoma County, OK 66 km (41 mi) NNW of here earthquakes near Oklahoma County

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

Aftershocks so far

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

  1. 2.0 2 km ENE of Hennessey, Oklahoma
  2. 2.2 9 km NNW of Perry, Oklahoma
  3. 1.7 9 km NW of Perry, Oklahoma
  4. 2.1 9 km NNW of Perry, Oklahoma
  5. 1.6 9 km WNW of Mulhall, Oklahoma
  6. 1.9 4 km ESE of Covington, Oklahoma
  7. 1.9 4 km ESE of Covington, Oklahoma
  8. 2.3 2 km W of Lucien, Oklahoma
  9. 1.6 4 km W of Lucien, Oklahoma
  10. 1.9 5 km E of Enid, Oklahoma
  11. 1.6 3 km W of Douglas, Oklahoma
  12. 1.5 Oklahoma
  13. 1.8 4 km W of Lucien, Oklahoma
  14. 2.0 5 km E of Hennessey, Oklahoma
  15. 1.6 5 km WNW of Mulhall, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.6 on 2018-04-09 — it released about 15,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.