QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

4 km ESE of Perry, Oklahoma

· 6.8 km deep · released about 40 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Noble County 12 kmPayne County 32 kmLogan County 44 kmPawnee County 49 kmGarfield County 50 kmKay County 61 kmLincoln County 71 kmKingfisher County 72 kmGrant 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 2.1 (ml)
Depth
6.8 km below the surface
Felt
no reports yet
Nearest
Noble County, 12 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1959 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 40 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 380,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 270,000× the energy of this one
  3. Around the size people start to feel M 3.0 24× the energy of this one
  4. This earthquake M 2.1 about 40 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 36.2752, -97.2433. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Noble County, OK 12 km (8 mi) S of here earthquakes near Noble County
Payne County, OK 32 km (20 mi) NW of here earthquakes near Payne County
Logan County, OK 44 km (27 mi) NNE of here earthquakes near Logan County
Pawnee County, OK 49 km (31 mi) W of here earthquakes near Pawnee County
Garfield County, OK 50 km (31 mi) ESE of here earthquakes near Garfield County
Kay County, OK 61 km (38 mi) S of here earthquakes near Kay County

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

Aftershocks so far

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

  1. 1.7 2 km ENE of Fairmont, Oklahoma
  2. 1.7 4 km SSE of Perry, Oklahoma
  3. 1.5 5 km WNW of Lucien, Oklahoma
  4. 1.8 4 km W of Lucien, Oklahoma
  5. 1.6 4 km W of Lucien, Oklahoma
  6. 2.0 4 km ESE of Covington, Oklahoma
  7. 2.3 5 km ESE of Covington, Oklahoma
  8. 1.5 9 km NW of Perry, Oklahoma
  9. 1.7 9 km NW of Perry, Oklahoma
  10. 2.2 9 km NNW of Perry, Oklahoma
  11. 1.7 9 km NW of Perry, Oklahoma
  12. 2.1 9 km NNW of Perry, Oklahoma
  13. 1.6 9 km WNW of Mulhall, Oklahoma
  14. 1.9 4 km ESE of Covington, Oklahoma
  15. 1.9 4 km ESE of Covington, 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 5.8 on 2016-09-03 — it released about 380,000 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.