QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

11 km NE of Harrah, Oklahoma

· 6.2 km deep · released about 170 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lincoln County 24 kmOklahoma County 30 kmPottawatomie County 40 kmCleveland County 45 kmLogan County 52 kmPayne County 58 kmSeminole County 62 kmOkfuskee County 68 kmMcClain County 70 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
6.2 km below the surface
Felt
no reports yet
Nearest
Lincoln County, 24 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3761 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 35.5615, -97.0748. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lincoln County, OK 24 km (15 mi) SW of here earthquakes near Lincoln County
Oklahoma County, OK 30 km (19 mi) E of here earthquakes near Oklahoma County
Pottawatomie County, OK 40 km (25 mi) NNW of here earthquakes near Pottawatomie County
Cleveland County, OK 45 km (28 mi) NNE of here earthquakes near Cleveland County
Logan County, OK 52 km (32 mi) SE of here earthquakes near Logan County
Payne County, OK 58 km (36 mi) S of here earthquakes near Payne County

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

Aftershocks so far

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

  1. 3.7 5 km W of Fallis, Oklahoma
  2. 2.9 7 km ENE of Harrah, Oklahoma
  3. 3.0 7 km ENE of Harrah, Oklahoma
  4. 2.8 7 km ENE of Harrah, Oklahoma
  5. 3.0 1 km E of Luther, Oklahoma
  6. 2.9 4 km WSW of Fallis, Oklahoma
  7. 3.6 4 km WSW of Fallis, Oklahoma
  8. 2.8 Oklahoma
  9. 3.6 7 km ENE of Harrah, Oklahoma
  10. 2.5 7 km ENE of Harrah, Oklahoma
  11. 2.8 7 km ENE of Harrah, Oklahoma
  12. 2.5 2 km E of Luther, Oklahoma
  13. 2.5 10 km NNW of Arcadia, Oklahoma
  14. 1.9 7 km ENE of Edmond, Oklahoma
  15. 2.6 8 km NNW of Arcadia, 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.