QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

5 km SE of Dacoma, Oklahoma

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

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alfalfa County 20 kmWoods County 33 kmMajor County 36 kmGrant County 67 kmBarber County 67 kmGarfield County 71 kmWoodward County 72 kmHarper County 73 kmBlaine County 84 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
6.3 km below the surface
Felt
no reports yet
Nearest
Alfalfa County, 20 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2910 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 36.6324, -98.5139. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alfalfa County, OK 20 km (13 mi) WSW of here earthquakes near Alfalfa County
Woods County, OK 33 km (20 mi) ESE of here earthquakes near Woods County
Major County, OK 36 km (22 mi) N of here earthquakes near Major County
Grant County, OK 67 km (42 mi) WSW of here earthquakes near Grant County
Barber County, KS 67 km (42 mi) SSE of here earthquakes near Barber County
Garfield County, OK 71 km (44 mi) WNW of here earthquakes near Garfield 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. 2.7 15 km SSE of Waynoka, Oklahoma
  2. 2.7 5 km WNW of Carmen, Oklahoma
  3. 3.2 15 km SSE of Waynoka, Oklahoma
  4. 2.7 17 km SE of Waynoka, Oklahoma
  5. 2.8 8 km SW of Waynoka, Oklahoma
  6. 2.7 3 km SE of Meno, Oklahoma
  7. 2.7 4 km NNE of Cherokee, Oklahoma
  8. 2.8 16 km SE of Waynoka, Oklahoma
  9. 2.7 8 km ENE of Nescatunga, Oklahoma
  10. 2.7 17 km SSE of Waynoka, Oklahoma
  11. 2.9 10 km WSW of Waynoka, Oklahoma
  12. 2.4 15 km SSE of Waynoka, Oklahoma
  13. 2.5 9 km SW of Waynoka, Oklahoma
  14. 2.5 5 km NW of Ames, Oklahoma
  15. 2.7 17 km SE of Waynoka, 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 5.1 on 2016-02-13 — it released about 1,000 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.