QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

5 km E of Hennessey, Oklahoma

· 6.8 km deep · released about 170 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kingfisher County 19 kmGarfield County 31 kmLogan County 41 kmBlaine County 59 kmNoble County 62 kmCanadian County 64 kmMajor County 67 kmOklahoma County 72 kmGrant County 76 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 2.5 (ml)
Depth
6.8 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Kingfisher County, 19 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1265 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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 36.1047, -97.8370. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kingfisher County, OK 19 km (12 mi) NNE of here earthquakes near Kingfisher County
Garfield County, OK 31 km (19 mi) S of here earthquakes near Garfield County
Logan County, OK 41 km (25 mi) WNW of here earthquakes near Logan County
Blaine County, OK 59 km (37 mi) ENE of here earthquakes near Blaine County
Noble County, OK 62 km (39 mi) WSW of here earthquakes near Noble County
Canadian County, OK 64 km (40 mi) NNE of here earthquakes near Canadian County

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

Aftershocks so far

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

  1. 1.5 11 km W of Kingfisher, Oklahoma
  2. 1.7 2 km WNW of Okarche, Oklahoma
  3. 1.5 3 km W of Okarche, Oklahoma
  4. 1.9 2 km W of Okarche, Oklahoma
  5. 1.6 5 km SSE of Dover, Oklahoma
  6. 1.8 3 km W of Okarche, Oklahoma
  7. 1.5 2 km NW of Okarche, Oklahoma
  8. 1.7 3 km W of Okarche, Oklahoma
  9. 1.7 4 km WNW of Okarche, Oklahoma
  10. 1.5 8 km SSW of Marshall, Oklahoma
  11. 1.7 6 km ENE of Fairmont, Oklahoma
  12. 2.5 Oklahoma
  13. 1.6 8 km WSW of Okarche, Oklahoma
  14. 1.7 6 km W of Loyal, Oklahoma
  15. 2.1 5 km ENE 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 2018-04-09 — it released about 1,400 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.