QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3mb_lg

10 km E of Jefferson, Oklahoma

· 5.0 km deep · released about 85 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grant County 13 kmGarfield County 39 kmKay County 48 kmNoble County 54 kmAlfalfa County 58 kmSumner County 60 kmHarper County 63 kmKingfisher County 89 kmMajor 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 2.3 (mb_lg)
Depth
5.0 km below the surface
Felt
7 reports · strongest reported intensity IV
Nearest
Grant County, 13 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2608 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 7 people have reported feeling it to USGS.

How big was it?

This earthquake released about 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 85 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 36.7177, -97.6721. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grant County, OK 13 km (8 mi) SE of here earthquakes near Grant County
Garfield County, OK 39 km (24 mi) NNE of here earthquakes near Garfield County
Kay County, OK 48 km (30 mi) WSW of here earthquakes near Kay County
Noble County, OK 54 km (33 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 60 km (37 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

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

  1. 1.8 9 km W of Lamont, Oklahoma
  2. 2.0 10 km ESE of Jefferson, Oklahoma
  3. 1.5 5 km WNW of Lucien, Oklahoma
  4. 1.9 2 km NE of Fairmont, Oklahoma
  5. 2.2 5 km SSW of Fairmont, Oklahoma
  6. 1.8 4 km E of Breckinridge, Oklahoma
  7. 1.9 9 km ESE of Jefferson, Oklahoma
  8. 1.9 5 km SSW of Fairmont, Oklahoma
  9. 2.9 5 km SSW of Fairmont, Oklahoma
  10. 3.0 5 km WNW of Lucien, Oklahoma
  11. 2.0 5 km WNW of Lucien, Oklahoma
  12. 1.7 8 km NW of Medford, Oklahoma
  13. 1.7 5 km SSW of Fairmont, Oklahoma
  14. 1.7 5 km SSW of Fairmont, Oklahoma
  15. 2.2 5 km SSW of Fairmont, 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 4.6 on 2018-04-07 — it released about 2,800 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.