QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

7 km N of Nardin, Oklahoma

· 7.9 km deep · released about 52 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kay County 27 kmGrant County 33 kmSumner County 40 kmNoble County 58 kmGarfield County 64 kmHarper County 66 kmCowley County 67 kmAlfalfa County 81 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 2.2 (ml)
Depth
7.9 km below the surface
Felt
no reports yet
Nearest
Kay County, 27 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2678 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 52 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 290,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 200,000× the energy of this one
  3. Around the size people start to feel M 3.0 18× the energy of this one
  4. This earthquake M 2.2 about 52 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 36.8762, -97.4375. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kay County, OK 27 km (17 mi) WNW of here earthquakes near Kay County
Grant County, OK 33 km (20 mi) ENE of here earthquakes near Grant County
Sumner County, KS 40 km (25 mi) S of here earthquakes near Sumner County
Noble County, OK 58 km (36 mi) NNW of here earthquakes near Noble County
Garfield County, OK 64 km (40 mi) NNE of here earthquakes near Garfield County
Harper County, KS 66 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

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

  1. 2.8 8 km N of Nardin, Oklahoma
  2. 2.4 9 km ESE of Jefferson, Oklahoma
  3. 2.3 6 km N of Nardin, Oklahoma
  4. 3.1 9 km ESE of Jefferson, Oklahoma
  5. 1.9 Kansas
  6. 1.9 2 km SSE of Bluff City, Kansas
  7. 1.8 3 km ENE of Freeport, Kansas
  8. 2.3 9 km SSE of Milan, Kansas
  9. 2.7 10 km SSE of Milan, Kansas
  10. 2.6 2 km ENE of Medford, Oklahoma
  11. 1.9 2 km SE of Milan, Kansas
  12. 1.8 7 km N of Nardin, Oklahoma
  13. 1.9 7 km N of Nardin, Oklahoma
  14. 1.6 6 km NNW of Nardin, Oklahoma
  15. 1.9 8 km N of Nardin, 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 4.3 on 2017-09-08 — it released about 1,600 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.