QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

11 km NW of Marshall, OK

Yes. A magnitude 2.2 earthquake was recorded 11 km NW of Marshall, OK, 68 km (42 mi) N of Oklahoma City, OK, at 8:50 pm CDT on 26 May 2018 (01:50 UTC), 5.0 km deep.

68 km (42 mi) N of Oklahoma City, OK · 44 km (27 mi) W of Stillwater, OK

· 5.0 km deep · released about 60 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Logan County 20 kmKingfisher County 37 kmGarfield County 40 kmNoble County 45 kmPayne County 52 kmOklahoma County 59 kmCanadian County 70 kmLincoln County 74 kmBlaine County 81 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 2.2 (ml)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Logan County, 20 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3004 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 32 km (20 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Likely felt in: Crescent 14 km, intensity II · Guthrie 25 km, intensity II · Langston 31 km, intensity II · Hennessey 31 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 60 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 250,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 60 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.6 on 2018-04-09 — about 4,000 times the energy of this one.

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 36.0734, -97.5587. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Logan County, OK 20 km (13 mi) SSE earthquakes near Logan County
Kingfisher County, OK 37 km (23 mi) WSW earthquakes near Kingfisher County
Garfield County, OK 40 km (25 mi) NNW earthquakes near Garfield County
Noble County, OK 45 km (28 mi) NE earthquakes near Noble County
Payne County, OK 52 km (33 mi) E earthquakes near Payne County
Oklahoma County, OK 59 km (37 mi) SSE earthquakes near Oklahoma County

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

Aftershocks so far

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

  1. 2.5 5 km N of Breckinridge, Oklahoma
  2. 2.7 0 km ENE of Coyle, Oklahoma
  3. 2.9 6 km SE of Meridian, Oklahoma
  4. 2.8 4 km WNW of Lucien, Oklahoma
  5. 2.2 7 km ENE of Guthrie, Oklahoma
  6. 2.6 5 km SSW of Langston, Oklahoma
  7. 2.2 5 km N of Breckinridge, Oklahoma
  8. 2.9 9 km NE of Marshall, Oklahoma
  9. 3.0 9 km NE of Marshall, Oklahoma
  10. 2.6 9 km NE of Marshall, Oklahoma
  11. 2.5 9 km NE of Marshall, Oklahoma
  12. 3.2 4 km N of Breckinridge, Oklahoma
  13. 2.6 7 km SE of Meridian, Oklahoma
  14. 2.6 6 km SE of Meridian, Oklahoma
  15. 3.0 7 km SE of Meridian, 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.