Earthquake · reviewed by a seismologist
M 2.5ml
Earthquake near Oklahoma City, OK
No earthquake was likely felt in Oklahoma City in the 24 hours to 1:26 pm CST (19:26 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 2.5 earthquake was recorded 49 km (30 mi) south of Oklahoma City, OK, at 10:06 pm CDT on 20 September 2017 (03:06 UTC), 5.5 km deep. 7 people have reported feeling it to USGS.
USGS: 1 km ENE of Dibble, Oklahoma
49 km (30 mi) S of Oklahoma City, OK · 33 km (21 mi) SW of Norman, OK
- When
- 10:06 pm CDT on 20 September 2017 ()
- Where
- 49 km (30 mi) south of Oklahoma City, OK · earthquakes near Oklahoma City
- Oklahoma today
- every earthquake in Oklahoma in the last 24 hours
- Magnitude
- M 2.5 (ml)
- Depth
- 5.5 km below the surface
- Felt
- 7 reports · strongest reported intensity III
- Nearest
- McClain County, 15 km E
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3250 days ago
Earthquake alerts for Oklahoma City, OK
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
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 46 km (29 mi) from the epicentre. In Oklahoma City, 49 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 · Lindsay 22 km, intensity II · Norman 26 km, intensity II · Chickasha 29 km, intensity II · Tuttle 33 km, intensity II · Moore 36 km, intensity II · Mustang 40 km, intensity II · Minco 43 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
- Magna, Utah 2020 M 5.7 63,000× the energy of this one
- Around the size people start to feel M 3.0 5.6× the energy of this one
- This earthquake M 2.5 about 170 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 35.0368, -97.6145. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| McClain County, OK | 15 km (9 mi) | E | earthquakes near McClain County |
| Grady County, OK | 25 km (15 mi) | W | earthquakes near Grady County |
| Cleveland County, OK | 33 km (20 mi) | NE | earthquakes near Cleveland County |
| Garvin County, OK | 46 km (28 mi) | SE | earthquakes near Garvin County |
| Oklahoma County, OK | 61 km (38 mi) | NNE | earthquakes near Oklahoma County |
| Pottawatomie County, OK | 63 km (39 mi) | ENE | earthquakes near Pottawatomie County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
36 earthquakes have been recorded within 50 km since this one.
- 2.9 1 km NW of Minco, Oklahoma
- 2.1 7 km S of Washington, Oklahoma
- 3.2 6 km N of Foster, Oklahoma
- 2.7 6 km N of Foster, Oklahoma
- 2.5 5 km N of Foster, Oklahoma
- 2.6 8 km SSW of Dibble, Oklahoma
- 2.4 4 km SE of Minco, Oklahoma
- 2.4 6 km NNW of Alex, Oklahoma
- 2.5 3 km SSW of Dibble, Oklahoma
- 2.4 5 km WSW of Minco, Oklahoma
- 3.0 5 km NW of Alex, Oklahoma
- 2.5 6 km NW of Alex, Oklahoma
- 2.1 5 km SSW of Yukon, Oklahoma
- 2.2 6 km SSW of Yukon, Oklahoma
- 2.7 5 km SSW of Yukon, 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
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.