QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3mwr

10 km W of Lamont, Oklahoma

· 8.6 km deep · released about 1.3 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grant County 14 kmGarfield County 37 kmKay County 49 kmNoble County 52 kmAlfalfa County 58 kmSumner County 62 kmHarper County 65 kmKingfisher County 87 kmMajor County 89 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 3.3 (mwr)
Depth
8.6 km below the surface
Felt
15 reports · strongest reported intensity III
Measured shaking
intensity IV (ShakeMap)
Nearest
Grant County, 14 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3355 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 15 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,000× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.8× 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 36.6999, -97.6698. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grant County, OK 14 km (9 mi) SE of here earthquakes near Grant County
Garfield County, OK 37 km (23 mi) NNE of here earthquakes near Garfield County
Kay County, OK 49 km (30 mi) WSW of here earthquakes near Kay County
Noble County, OK 52 km (32 mi) NW of here earthquakes near Noble County
Alfalfa County, OK 58 km (36 mi) E of here earthquakes near Alfalfa County
Sumner County, KS 62 km (38 mi) SSW of here earthquakes near Sumner County

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

Aftershocks so far

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

  1. 3.3 Oklahoma
  2. 2.5 5 km WNW of Medford, Oklahoma
  3. 1.6 2 km NNE of Bluff City, Kansas
  4. 2.0 10 km WNW of Caldwell, Kansas
  5. 3.1 8 km SE of Pond Creek, Oklahoma
  6. 1.6 10 km WNW of Caldwell, Kansas
  7. 2.6 4 km W of Lucien, Oklahoma
  8. 1.7 5 km E of Caldwell, Kansas
  9. 1.7 9 km W of Bluff City, Kansas
  10. 2.7 4 km W of Renfrow, Oklahoma
  11. 2.7 3 km SW of Deer Creek, Oklahoma
  12. 2.6 1 km W of Douglas, Oklahoma
  13. 2.4 1 km WNW of Douglas, Oklahoma
  14. 3.1 10 km W of Lamont, Oklahoma
  15. 2.7 10 km W of Lamont, 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 2016-07-17 — it released about 22 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.