QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

Oklahoma

Yes. A magnitude 1.6 earthquake was recorded in Oklahoma, at 5:33 am CDT on 14 August 2023 (10:33 UTC), 10 km deep.

· 10 km deep · released about 6.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Blaine County 17 kmCuster County 41 kmDewey County 45 kmMajor County 59 kmCanadian County 60 kmKingfisher County 61 kmWashita County 66 kmCaddo County 71 kmWoodward County 95 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
Oklahoma today
every earthquake in Oklahoma in the last 24 hours
Magnitude
M 1.6 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Blaine County, 17 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1184 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Earthquakes near other towns within 30 km: Thomas, Watonga, Geary.

How big was it?

This earthquake released about 6.8 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
  3. Around the size people start to feel M 3.0 140× the energy of this one
  4. This earthquake M 1.6 about 6.8 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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 35.7827, -98.5798. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Blaine County, OK 17 km (11 mi) NE earthquakes near Blaine County
Custer County, OK 41 km (25 mi) WSW earthquakes near Custer County
Dewey County, OK 45 km (28 mi) WNW earthquakes near Dewey County
Major County, OK 59 km (37 mi) N earthquakes near Major County
Canadian County, OK 60 km (38 mi) ESE earthquakes near Canadian County
Kingfisher County, OK 61 km (38 mi) ENE earthquakes near Kingfisher County

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

Aftershocks so far

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

  1. 1.7 4 km NNE of Calumet, Oklahoma
  2. 1.5 3 km NNE of Okeene, Oklahoma
  3. 1.8 3 km NNE of Okeene, Oklahoma
  4. 1.5 5 km NE of Calumet, Oklahoma
  5. 1.8 4 km NNE of Okeene, Oklahoma
  6. 1.7 6 km NNE of Calumet, Oklahoma
  7. 1.6 5 km NE of Calumet, Oklahoma
  8. 1.6 5 km NNE of Calumet, Oklahoma
  9. 1.7 4 km NNE of Calumet, Oklahoma
  10. 1.6 5 km NNE of Calumet, Oklahoma
  11. 1.8 4 km NNE of Calumet, Oklahoma
  12. 1.6 4 km NNE of Calumet, Oklahoma
  13. 1.7 5 km NNE of Calumet, Oklahoma
  14. 1.6 5 km NNE of Calumet, Oklahoma
  15. 2.0 6 km NNE of Calumet, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.