QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

Earthquake near Oklahoma City, OK

No earthquake was likely felt in Oklahoma City in the 24 hours to 12:19 pm CST (18:19 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 1.5 earthquake was recorded 49 km (31 mi) south-southwest of Oklahoma City, OK, at 3:11 am CST on 27 November 2020 (09:11 UTC), 7.0 km deep.

USGS: 1 km WNW of Dibble, Oklahoma

49 km (31 mi) SSW of Oklahoma City, OK · 35 km (22 mi) SW of Norman, OK

3:11 am CST, Nov 27, 2020 · · 7.0 km deep · released about 6.2 lb of TNT

10 km30 km60 km120 km N McClain County 18 kmGrady County 22 kmCleveland County 35 kmGarvin County 47 kmOklahoma County 61 kmCanadian County 64 kmStephens County 65 kmPottawatomie County 65 kmCaddo County 69 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
3:11 am CST on 27 November 2020 ()
Where
49 km (31 mi) south-southwest of Oklahoma City, OK · earthquakes near Oklahoma City
Oklahoma today
every earthquake in Oklahoma in the last 24 hours
Magnitude
M 1.5 (ml)
Depth
7.0 km below the surface
Felt
no reports yet
Nearest
McClain County, 18 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2172 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. In Oklahoma City, 49 km away, the estimate is intensity I (not felt). 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: Blanchard, Goldsby, Lindsay, Newcastle, Noble, Purcell.

How big was it?

This earthquake released about 6.2 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.5 about 6.2 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 35.0373, -97.6438. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
McClain County, OK 18 km (11 mi) E earthquakes near McClain County
Grady County, OK 22 km (14 mi) W earthquakes near Grady County
Cleveland County, OK 35 km (22 mi) ENE earthquakes near Cleveland County
Garvin County, OK 47 km (29 mi) SE earthquakes near Garvin County
Oklahoma County, OK 61 km (38 mi) NNE earthquakes near Oklahoma County
Canadian County, OK 64 km (40 mi) NNW earthquakes near Canadian County

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

Aftershocks so far

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

  1. 1.6 3 km N of Minco, Oklahoma
  2. 1.9 4 km NNE of Minco, Oklahoma
  3. 2.5 4 km N of Minco, Oklahoma
  4. 1.6 4 km NNE of Minco, Oklahoma
  5. 1.6 4 km SSE of Union City, Oklahoma
  6. 1.8 4 km SSE of Union City, Oklahoma
  7. 1.5 4 km SSE of Union City, Oklahoma
  8. 2.5 4 km NNE of Minco, Oklahoma
  9. 2.4 3 km NNE of Minco, Oklahoma
  10. 1.5 4 km SSE of Union City, Oklahoma
  11. 1.8 8 km NE of Alex, Oklahoma
  12. 2.2 4 km SSE of Union City, Oklahoma
  13. 1.8 4 km SSE of Union City, Oklahoma
  14. 1.6 1 km NE of Minco, Oklahoma
  15. 1.7 2 km ENE of Minco, 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.