QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

7 km E of Nescatunga, Oklahoma

· 6.8 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alfalfa County 23 kmGrant County 25 kmHarper County 47 kmGarfield County 49 kmMajor County 66 kmWoods County 71 kmSumner County 73 kmBarber County 75 kmKay County 82 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 3.1 (ml)
Depth
6.8 km below the surface
Felt
no reports yet
Nearest
Alfalfa County, 23 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2922 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 36.7628, -98.0658. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alfalfa County, OK 23 km (14 mi) E of here earthquakes near Alfalfa County
Grant County, OK 25 km (15 mi) W of here earthquakes near Grant County
Harper County, KS 47 km (29 mi) S of here earthquakes near Harper County
Garfield County, OK 49 km (31 mi) NNW of here earthquakes near Garfield County
Major County, OK 66 km (41 mi) NE of here earthquakes near Major County
Woods County, OK 71 km (44 mi) E of here earthquakes near Woods County

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

Aftershocks so far

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

  1. 2.2 5 km E of Bluff City, Kansas
  2. 1.7 4 km E of Bluff City, Kansas
  3. 1.8 4 km E of Bluff City, Kansas
  4. 1.9 4 km E of Bluff City, Kansas
  5. 2.7 9 km ENE of Nash, Oklahoma
  6. 2.2 Kansas
  7. 2.8 5 km E of Bluff City, Kansas
  8. 2.8 6 km NE of Medford, Oklahoma
  9. 3.5 5 km NE of Medford, Oklahoma
  10. 2.7 10 km ESE of Jefferson, Oklahoma
  11. 2.6 10 km W of Lamont, Oklahoma
  12. 2.6 4 km N of Breckinridge, Oklahoma
  13. 2.4 4 km N of Breckinridge, Oklahoma
  14. 2.1 2 km SSE of Bluff City, Kansas
  15. 3.0 8 km SSW of Burlington, 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 4.4 on 2018-06-09 — 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.