Earthquake · reviewed by a seismologist
M 4.0mwr
Earthquake near Shattuck, OK
No earthquake was likely felt in Shattuck in the 24 hours to 11:40 am CST (17:40 UTC). The last one was M 3.4, 181 km (113 mi) ESE, at 5:53 am CST on 7 November 2026, estimated intensity II (weak) in town; 23 felt reports to USGS. Every earthquake near Shattuck
This page: a magnitude 4.0 earthquake was recorded 3 km (2 mi) west-northwest of Shattuck, OK, at 1:24 pm CDT on 25 May 2021 (18:24 UTC), 7.7 km deep. 108 people have reported feeling it to USGS.
USGS: 3 km WNW of Shattuck, Oklahoma
- When
- 1:24 pm CDT on 25 May 2021 ()
- Where
- 3 km (2 mi) west-northwest of Shattuck, OK · earthquakes near Shattuck
- Oklahoma today
- every earthquake in Oklahoma in the last 24 hours
- Magnitude
- M 4.0 (mwr)
- Depth
- 7.7 km below the surface
- Felt
- 108 reports · strongest reported intensity V
- Measured shaking
- intensity V (ShakeMap)
- Nearest
- Ellis County, 16 km ESE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1929 days ago
Earthquake alerts for Shattuck, 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 light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.
At this magnitude and depth, people at rest would likely notice it out to about 476 km (296 mi) from the epicentre. In Shattuck, 3 km away, the estimate is intensity IV (light). 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: Woodward 50 km, intensity III. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 18 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.0 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 9,400× the energy of this one
- Mineral, Virginia 2011 M 5.8 420× the energy of this one
- Magna, Utah 2020 M 5.7 300× the energy of this one
- This earthquake M 4.0 about 18 tons of TNT
- Around the size people start to feel M 3.0 this one released 38× more
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
The largest earthquake within 50 km (31 mi) since our catalogue begins in 2016. No other earthquake of M4 or more has been recorded this close in that time.
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 36.2862, -99.9147. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Ellis County, OK | 16 km (10 mi) | ESE | earthquakes near Ellis County |
| Lipscomb County, TX | 32 km (20 mi) | W | earthquakes near Lipscomb County |
| Woodward County, OK | 59 km (37 mi) | ENE | earthquakes near Woodward County |
| Harper County, OK | 61 km (38 mi) | NNE | earthquakes near Harper County |
| Hemphill County, TX | 62 km (38 mi) | SSW | earthquakes near Hemphill County |
| Roger Mills County, OK | 66 km (41 mi) | SSE | earthquakes near Roger Mills County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
6 earthquakes have been recorded within 50 km since this one.
- 2.0 18 km SW of May, Oklahoma
- 2.9 6 km NE of Follett, Texas
- 1.6 5 km NW of Fort Supply, Oklahoma
- 2.1 12 km SSW of Higgins, Texas
- 1.6 5 km NNE of Fort Supply, Oklahoma
- 1.6 4 km NW of Shattuck, 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.