QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1mb_lg

7 km S of Perry, Oklahoma

· 3.8 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Noble County 19 kmPayne County 33 kmLogan County 36 kmGarfield County 47 kmPawnee County 55 kmKingfisher County 64 kmKay County 68 kmLincoln County 69 kmOklahoma County 74 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 (mb_lg)
Depth
3.8 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Noble County, 19 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1517 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 36.2184, -97.2987. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Noble County, OK 19 km (12 mi) SSW of here earthquakes near Noble County
Payne County, OK 33 km (20 mi) WNW of here earthquakes near Payne County
Logan County, OK 36 km (23 mi) NNE of here earthquakes near Logan County
Garfield County, OK 47 km (29 mi) ESE of here earthquakes near Garfield County
Pawnee County, OK 55 km (34 mi) W of here earthquakes near Pawnee County
Kingfisher County, OK 64 km (40 mi) ENE of here earthquakes near Kingfisher County

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

Aftershocks so far

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

  1. 2.9 7 km E of Marland, Oklahoma
  2. 3.2 7 km ESE of Marland, Oklahoma
  3. 2.6 3 km ESE of Fairmont, Oklahoma
  4. 3.2 2 km NE of Meridian, Oklahoma
  5. 3.1 8 km NNE of Guthrie, Oklahoma
  6. 2.6 5 km WNW of Lucien, Oklahoma
  7. 2.6 Oklahoma
  8. 2.8 3 km E of Mulhall, Oklahoma
  9. 2.8 1 km WSW of Meridian, Oklahoma
  10. 2.5 5 km SE of Guthrie, Oklahoma
  11. 2.6 7 km ESE of Lucien, Oklahoma
  12. 2.8 1 km W of Meridian, Oklahoma
  13. 3.6 2 km NNW of Fairmont, Oklahoma
  14. 2.6 10 km N of Crescent, Oklahoma
  15. 2.7 3 km NNW 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 4.2 on 2016-03-29 — it released about 1,400 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.