QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

12 km NW of Watonga, Oklahoma

· 7.9 km deep · released about 49 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Blaine County 9 kmDewey County 45 kmMajor County 45 kmCuster County 52 kmKingfisher County 53 kmCanadian County 64 kmWashita County 81 kmCaddo County 83 kmGarfield 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 2.1 (ml)
Depth
7.9 km below the surface
Felt
no reports yet
Nearest
Blaine County, 9 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2158 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 49 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 310,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 220,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 49 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 35.9078, -98.5217. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Blaine County, OK 9 km (6 mi) WNW of here earthquakes near Blaine County
Dewey County, OK 45 km (28 mi) E of here earthquakes near Dewey County
Major County, OK 45 km (28 mi) S of here earthquakes near Major County
Custer County, OK 52 km (32 mi) NE of here earthquakes near Custer County
Kingfisher County, OK 53 km (33 mi) W of here earthquakes near Kingfisher County
Canadian County, OK 64 km (39 mi) NW of here earthquakes near Canadian County

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

Aftershocks so far

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

  1. 2.5 14 km SSW of Loyal, Oklahoma
  2. 1.5 13 km SSW of Loyal, Oklahoma
  3. 1.5 16 km SSW of Loyal, Oklahoma
  4. 1.6 14 km SSW of Loyal, Oklahoma
  5. 1.7 14 km SSW of Loyal, Oklahoma
  6. 1.7 14 km SSW of Loyal, Oklahoma
  7. 1.7 14 km SSW of Loyal, Oklahoma
  8. 1.7 7 km WSW of Custer City, Oklahoma
  9. 2.0 2 km ESE of Ames, Oklahoma
  10. 1.6 2 km SE of Ames, Oklahoma
  11. 1.7 13 km SSW of Loyal, Oklahoma
  12. 1.5 13 km SSW of Loyal, Oklahoma
  13. 2.3 11 km W of Hennessey, Oklahoma
  14. 1.8 7 km S of Putnam, Oklahoma
  15. 1.8 13 km W of Kingfisher, 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 4.1 on 2016-01-18 — it released about 870 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.