QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

Oklahoma

Yes. A magnitude 1.8 earthquake was recorded in Oklahoma, 66 km (41 mi) W of Oklahoma City, OK, at 11:51 am CDT on 2 July 2023 (16:51 UTC), 7.4 km deep. 1 person has reported feeling it to USGS.

66 km (41 mi) W of Oklahoma City, OK

· 7.4 km deep · released about 17 lb of TNT

10 km30 km60 km120 km N Canadian County 26 kmCaddo County 33 kmBlaine County 51 kmGrady County 57 kmKingfisher County 63 kmWashita County 70 kmCuster County 72 kmOklahoma County 76 kmMcClain County 86 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 1.8 (ml)
Depth
7.4 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Canadian County, 26 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1228 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 17 km (11 mi) from the epicentre. 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: Hinton, Geary, El Reno, Union City.

How big was it?

This earthquake released about 17 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 870,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 620,000× the energy of this one
  3. Around the size people start to feel M 3.0 55× the energy of this one
  4. This earthquake M 1.8 about 17 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 35.4442, -98.2395. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Canadian County, OK 26 km (16 mi) ENE earthquakes near Canadian County
Caddo County, OK 33 km (21 mi) SSW earthquakes near Caddo County
Blaine County, OK 51 km (32 mi) NNW earthquakes near Blaine County
Grady County, OK 57 km (35 mi) SE earthquakes near Grady County
Kingfisher County, OK 63 km (39 mi) NNE earthquakes near Kingfisher County
Washita County, OK 70 km (44 mi) WSW earthquakes near Washita County

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

Aftershocks so far

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

  1. 2.1 15 km ENE of Thomas, Oklahoma
  2. 1.6 Oklahoma
  3. 1.6 15 km ENE of Thomas, Oklahoma
  4. 2.0 14 km ENE of Thomas, Oklahoma
  5. 1.6 15 km WSW of Watonga, Oklahoma
  6. 1.7 15 km WSW of Watonga, Oklahoma
  7. 1.6 7 km N of Calumet, Oklahoma
  8. 1.5 6 km NNE of Calumet, Oklahoma
  9. 1.9 8 km SW of El Reno, Oklahoma
  10. 1.5 6 km NNW of Calumet, Oklahoma
  11. 2.1 10 km SW of El Reno, Oklahoma
  12. 1.7 10 km SW of El Reno, Oklahoma
  13. 1.5 9 km WSW of El Reno, Oklahoma
  14. 1.7 8 km N of Calumet, Oklahoma
  15. 1.6 9 km N 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.