QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7mwr

8 km SW of Shamrock, Oklahoma

· 4.7 km deep · released about 5.4 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Creek County 25 kmLincoln County 27 kmPayne County 38 kmPawnee County 51 kmOkfuskee County 52 kmOkmulgee County 66 kmTulsa County 70 kmLogan County 72 kmOklahoma County 76 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 3.7 (mwr)
Depth
4.7 km below the surface
Felt
37 reports · strongest reported intensity V
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Nearest
Creek County, 25 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2382 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 37 people have reported feeling it to USGS.

How big was it?

This earthquake released about 5.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 32,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,000× the energy of this one
  4. This earthquake M 3.7 about 5.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 11× more

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 35.8537, -96.6512. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Creek County, OK 25 km (16 mi) WSW of here earthquakes near Creek County
Lincoln County, OK 27 km (17 mi) NE of here earthquakes near Lincoln County
Payne County, OK 38 km (24 mi) SE of here earthquakes near Payne County
Pawnee County, OK 51 km (32 mi) S of here earthquakes near Pawnee County
Okfuskee County, OK 52 km (32 mi) NW of here earthquakes near Okfuskee County
Okmulgee County, OK 66 km (41 mi) WNW of here earthquakes near Okmulgee County

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

Aftershocks so far

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

  1. 2.6 2 km SSE of Carney, Oklahoma
  2. 2.6 4 km N of Stroud, Oklahoma
  3. 2.3 8 km SSW of Shamrock, Oklahoma
  4. 2.5 10 km WSW of Shamrock, Oklahoma
  5. 2.3 10 km WSW of Shamrock, Oklahoma
  6. 3.0 6 km W of Sparks, Oklahoma
  7. 2.3 7 km SW of Shamrock, Oklahoma
  8. 2.7 2 km SSW of Agra, Oklahoma
  9. 2.2 8 km NE of Kendrick, Oklahoma
  10. 2.5 1 km SW of Agra, Oklahoma
  11. 2.4 6 km NNE of Stillwater, Oklahoma
  12. 2.7 5 km N of Stroud, Oklahoma
  13. 2.5 6 km SW of Shamrock, Oklahoma
  14. 2.9 5 km NNE of Stillwater, Oklahoma
  15. 2.0 4 km NNE of Stillwater, 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 89 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.