QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

Earthquake near Oklahoma City, OK

No earthquake was likely felt in Oklahoma City in the 24 hours to 5:43 pm CST (23:43 UTC). The last one was M 3.4, 50 km (31 mi) WNW, at 5:53 am CST on 7 November 2026, estimated intensity III (weak) in town; 23 felt reports to USGS. Every earthquake near Oklahoma City

This page: a magnitude 2.9 earthquake was recorded 47 km (29 mi) south of Oklahoma City, OK, at 10:40 pm CDT on 5 August 2018 (03:40 UTC), 4.3 km deep. 28 people have reported feeling it to USGS.

USGS: 4 km ENE of Dibble, Oklahoma

47 km (29 mi) S of Oklahoma City, OK · 31 km (19 mi) SW of Norman, OK

10:40 pm CDT, Aug 5, 2018 · · 4.3 km deep · released about 680 lb of TNT

Every earthquake near Oklahoma City Felt it? Tell USGS Check my area
10 km30 km60 km120 km N McClain County 13 kmGrady County 27 kmCleveland County 30 kmGarvin County 46 kmOklahoma County 58 kmPottawatomie County 60 kmCanadian County 65 kmStephens County 68 kmCaddo County 73 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
10:40 pm CDT on 5 August 2018 ()
Where
47 km (29 mi) south of Oklahoma City, OK · earthquakes near Oklahoma City
Oklahoma today
every earthquake in Oklahoma in the last 24 hours
Magnitude
M 2.9 (ml)
Depth
4.3 km below the surface
Felt
28 reports · strongest reported intensity IV
Nearest
McClain County, 13 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2428 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 67 km (42 mi) from the epicentre. In Oklahoma City, 47 km away, the estimate is intensity II (weak). 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.

Likely felt in: Blanchard 12 km, intensity III · Norman 23 km, intensity III · Lindsay 24 km, intensity III · Chickasha 32 km, intensity III · Moore 33 km, intensity III · Tuttle 34 km, intensity III · Mustang 39 km, intensity II · Minco 44 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 35.0507, -97.5879. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
McClain County, OK 13 km (8 mi) ESE earthquakes near McClain County
Grady County, OK 27 km (17 mi) W earthquakes near Grady County
Cleveland County, OK 30 km (18 mi) NE earthquakes near Cleveland County
Garvin County, OK 46 km (28 mi) SSE earthquakes near Garvin County
Oklahoma County, OK 58 km (36 mi) NNE earthquakes near Oklahoma County
Pottawatomie County, OK 60 km (37 mi) ENE earthquakes near Pottawatomie County

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

Aftershocks so far

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

  1. 2.3 4 km S of Amber, Oklahoma
  2. 2.1 6 km S of Amber, Oklahoma
  3. 2.2 4 km SW of Tuttle, Oklahoma
  4. 2.5 5 km S of Amber, Oklahoma
  5. 2.4 5 km S of Amber, Oklahoma
  6. 2.7 5 km S of Amber, Oklahoma
  7. 2.1 3 km WNW of Alex, Oklahoma
  8. 2.2 1 km NE of Wayne, Oklahoma
  9. 2.4 5 km SW of Tuttle, Oklahoma
  10. 2.3 7 km WSW of Tuttle, Oklahoma
  11. 2.3 1 km NW of Wayne, Oklahoma
  12. 2.3 5 km WSW of Tuttle, Oklahoma
  13. 2.1 6 km WSW of Tuttle, Oklahoma
  14. 2.1 6 km WSW of Tuttle, Oklahoma
  15. 2.3 5 km SW of Tuttle, 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.