QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

7 km N of Nardin, Oklahoma

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

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kay County 28 kmGrant County 32 kmSumner County 41 kmNoble County 57 kmGarfield County 63 kmHarper County 65 kmCowley County 68 kmAlfalfa County 79 kmSedgwick County 90 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
3.0 km below the surface
Felt
4 reports · strongest reported intensity III
Nearest
Kay County, 28 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3440 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 4 people have reported feeling it to USGS.

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 36.8704, -97.4489. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kay County, OK 28 km (17 mi) WNW of here earthquakes near Kay County
Grant County, OK 32 km (20 mi) ENE of here earthquakes near Grant County
Sumner County, KS 41 km (25 mi) S of here earthquakes near Sumner County
Noble County, OK 57 km (36 mi) NNW of here earthquakes near Noble County
Garfield County, OK 63 km (39 mi) NNE of here earthquakes near Garfield County
Harper County, KS 65 km (41 mi) ESE of here earthquakes near Harper County

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

Aftershocks so far

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

  1. 2.4 9 km WNW of South Haven, Kansas
  2. 2.2 9 km WNW of South Haven, Kansas
  3. 2.7 8 km WNW of Deer Creek, Oklahoma
  4. 2.7 0 km WSW of Wakita, Oklahoma
  5. 1.7 5 km SSW of Bluff City, Kansas
  6. 1.7 5 km SSE of Freeport, Kansas
  7. 2.7 6 km WNW of Lamont, Oklahoma
  8. 2.8 3 km WNW of Deer Creek, Oklahoma
  9. 1.5 12 km W of Caldwell, Kansas
  10. 1.7 5 km SSE of Freeport, Kansas
  11. 2.6 2 km ENE of South Haven, Kansas
  12. 1.7 12 km SSE of Milan, Kansas
  13. 2.1 5 km SSE of Freeport, Kansas
  14. 3.4 9 km ESE of Medford, Oklahoma
  15. 1.8 5 km SSE of Freeport, Kansas

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 4.0 on 2016-11-25 — 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.