QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

7 km ESE of Agra, Oklahoma

· 7.8 km deep · released about 40 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lincoln County 20 kmPayne County 28 kmCreek County 38 kmPawnee County 50 kmLogan County 59 kmOkfuskee County 62 kmOklahoma County 66 kmNoble County 70 kmPottawatomie 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
7.8 km below the surface
Felt
no reports yet
Nearest
Lincoln County, 20 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2356 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 35.8690, -96.7955. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lincoln County, OK 20 km (12 mi) NNE of here earthquakes near Lincoln County
Payne County, OK 28 km (18 mi) SE of here earthquakes near Payne County
Creek County, OK 38 km (23 mi) W of here earthquakes near Creek County
Pawnee County, OK 50 km (31 mi) S of here earthquakes near Pawnee County
Logan County, OK 59 km (37 mi) E of here earthquakes near Logan County
Okfuskee County, OK 62 km (38 mi) NW of here earthquakes near Okfuskee County

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

Aftershocks so far

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

  1. 1.9 4 km W of Prague, Oklahoma
  2. 1.9 8 km NW of Prague, Oklahoma
  3. 1.7 5 km NNE of Stroud, Oklahoma
  4. 1.7 5 km NNE of Stroud, Oklahoma
  5. 1.7 5 km NNE of Stroud, Oklahoma
  6. 1.9 5 km NNE of Stroud, Oklahoma
  7. 1.8 Oklahoma
  8. 1.9 5 km NNE of Stroud, Oklahoma
  9. 1.6 5 km N of Stroud, Oklahoma
  10. 1.5 5 km N of Stroud, Oklahoma
  11. 2.1 5 km N of Stroud, Oklahoma
  12. 2.0 5 km N of Stroud, Oklahoma
  13. 1.8 5 km N of Stroud, Oklahoma
  14. 1.9 5 km N of Stroud, Oklahoma
  15. 1.9 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 5.0 on 2016-11-07 — it released about 24,000 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.