QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

4 km E of Harrah, Oklahoma

· 6.5 km deep · released about 170 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Oklahoma County 28 kmLincoln County 32 kmPottawatomie County 34 kmCleveland County 37 kmLogan County 56 kmSeminole County 59 kmMcClain County 61 kmPayne County 67 kmOkfuskee County 71 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 2.5 (ml)
Depth
6.5 km below the surface
Felt
no reports yet
Nearest
Oklahoma County, 28 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3813 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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 35.4879, -97.1145. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Oklahoma County, OK 28 km (17 mi) ESE of here earthquakes near Oklahoma County
Lincoln County, OK 32 km (20 mi) SW of here earthquakes near Lincoln County
Pottawatomie County, OK 34 km (21 mi) NNW of here earthquakes near Pottawatomie County
Cleveland County, OK 37 km (23 mi) NNE of here earthquakes near Cleveland County
Logan County, OK 56 km (35 mi) SSE of here earthquakes near Logan County
Seminole County, OK 59 km (37 mi) NW of here earthquakes near Seminole 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. 2.6 6 km W of Arcadia, Oklahoma
  2. 2.0 6 km W of Arcadia, Oklahoma
  3. 2.4 2 km NNE of Meridian, Oklahoma
  4. 3.0 3 km NE of Meridian, Oklahoma
  5. 2.6 3 km NE of Meridian, Oklahoma
  6. 3.4 5 km SW of Fallis, Oklahoma
  7. 3.0 6 km W of Arcadia, Oklahoma
  8. 2.6 8 km ESE of Guthrie, Oklahoma
  9. 2.6 5 km NNE of Dale, Oklahoma
  10. 3.3 6 km ENE of Edmond, Oklahoma
  11. 2.6 4 km WSW of Luther, Oklahoma
  12. 2.6 6 km NW of Meridian, Oklahoma
  13. 3.6 6 km NW of Meridian, Oklahoma
  14. 2.4 12 km SE of Cedar Valley, Oklahoma
  15. 3.0 12 km SE of Cedar Valley, 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 4.2 on 2016-01-01 — it released about 350 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.