QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

Earthquake near Oklahoma City, OK

No earthquake was likely felt in Oklahoma City in the 24 hours to 11:13 pm CST (05:13 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 2.6 earthquake was recorded 31 km (19 mi) south-southwest of Oklahoma City, OK, at 7:21 pm CDT on 26 October 2017 (00:21 UTC), 7.0 km deep. 24 people have reported feeling it to USGS.

USGS: 3 km E of Bridge Creek, Oklahoma

31 km (19 mi) SSW of Oklahoma City, OK · 23 km (14 mi) WSW of Moore, OK

7:21 pm CDT, Oct 26, 2017 · · 7.0 km deep · released about 240 lb of TNT

Every earthquake near Oklahoma City Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grady County 29 kmMcClain County 33 kmCleveland County 34 kmCanadian County 43 kmOklahoma County 45 kmCaddo County 63 kmPottawatomie County 67 kmGarvin County 67 kmLogan County 79 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
7:21 pm CDT on 26 October 2017 ()
Where
31 km (19 mi) south-southwest of Oklahoma City, OK · earthquakes near Oklahoma City
Oklahoma today
every earthquake in Oklahoma in the last 24 hours
Magnitude
M 2.6 (ml)
Depth
7.0 km below the surface
Felt
24 reports · strongest reported intensity IV
Nearest
Grady County, 29 km SW
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 51 km (32 mi) from the epicentre. In Oklahoma City, 31 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 11 km, intensity III · Tuttle 13 km, intensity III · Mustang 17 km, intensity III · Moore 23 km, intensity III · Norman 23 km, intensity II · Minco 24 km, intensity II · Union City 29 km, intensity II · Chickasha 29 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 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 35.2289, -97.6957. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Grady County, OK 29 km (18 mi) SW earthquakes near Grady County
McClain County, OK 33 km (20 mi) SE earthquakes near McClain County
Cleveland County, OK 34 km (21 mi) E earthquakes near Cleveland County
Canadian County, OK 43 km (27 mi) NW earthquakes near Canadian County
Oklahoma County, OK 45 km (28 mi) NE earthquakes near Oklahoma County
Caddo County, OK 63 km (39 mi) W earthquakes near Caddo County

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

Aftershocks so far

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

  1. 2.5 8 km NNW of Union City, Oklahoma
  2. 2.6 8 km SSW of Dibble, Oklahoma
  3. 2.5 13 km W of Union City, Oklahoma
  4. 2.4 4 km SE of Minco, Oklahoma
  5. 2.4 6 km NNW of Alex, Oklahoma
  6. 2.5 3 km SSW of Dibble, Oklahoma
  7. 2.4 5 km WSW of Minco, Oklahoma
  8. 3.0 5 km NW of Alex, Oklahoma
  9. 2.5 6 km NW of Alex, Oklahoma
  10. 2.8 4 km NNE of Union City, Oklahoma
  11. 2.6 14 km W of Union City, Oklahoma
  12. 2.5 13 km W of Union City, Oklahoma
  13. 2.1 5 km SSW of Yukon, Oklahoma
  14. 2.5 15 km W of Union City, Oklahoma
  15. 2.6 15 km W of Union City, 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.