Earthquake · reviewed by a seismologist
M 1.6ml
Earthquake near Woodward, OK
No earthquake was likely felt in Woodward in the 24 hours to 3:51 pm CST (21:51 UTC). The last one was M 3.4, 152 km (94 mi) SE, at 5:53 am CST on 7 November 2026, estimated intensity II (weak) in town; 23 felt reports to USGS. Every earthquake near Woodward
This page: a magnitude 1.6 earthquake was recorded 36 km (22 mi) east-northeast of Woodward, OK, at 10:48 pm CDT on 21 July 2021 (03:48 UTC), 7.0 km deep.
USGS: 8 km NNE of Quinlan, Oklahoma
- When
- 10:48 pm CDT on 21 July 2021 ()
- Where
- 36 km (22 mi) east-northeast of Woodward, OK · earthquakes near Woodward
- Oklahoma today
- every earthquake in Oklahoma in the last 24 hours
- Magnitude
- M 1.6 (ml)
- Depth
- 7.0 km below the surface
- Felt
- no reports yet
- Nearest
- Woods County, 26 km NNE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1938 days ago
Earthquake alerts for Woodward, OK
Get a notification in this browser when USGS records an earthquake near Woodward, OK. No account or email needed.
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 minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 3 km (2 mi) from the epicentre. In Woodward, 36 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.
Earthquakes near other towns within 30 km: Mooreland.
How big was it?
This earthquake released about 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
- Around the size people start to feel M 3.0 130× the energy of this one
- This earthquake M 1.6 about 7.6 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
The largest earthquake within 50 km since 2016 was M 5.1 on 2016-02-13 — about 180,000 times the energy of this one.
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 36.5212, -99.0012. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Woods County, OK | 26 km (16 mi) | NNE | earthquakes near Woods County |
| Woodward County, OK | 27 km (17 mi) | WSW | earthquakes near Woodward County |
| Major County, OK | 47 km (29 mi) | ESE | earthquakes near Major County |
| Dewey County, OK | 60 km (38 mi) | S | earthquakes near Dewey County |
| Alfalfa County, OK | 65 km (40 mi) | ENE | earthquakes near Alfalfa County |
| Harper County, OK | 67 km (41 mi) | WNW | earthquakes near Harper County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
57 earthquakes have been recorded within 50 km since this one.
- 1.8 10 km W of Fairview, Oklahoma
- 1.9 10 km E of Chester, Oklahoma
- 1.7 17 km SSE of Waynoka, Oklahoma
- 1.5 9 km NNW of Mooreland, Oklahoma
- 1.8 10 km NNW of Mooreland, Oklahoma
- 1.7 8 km SW of Waynoka, Oklahoma
- 1.9 7 km WSW of Aline, Oklahoma
- 1.7 10 km ESE of Chester, Oklahoma
- 1.9 21 km NE of Chester, Oklahoma
- 1.9 16 km SE of Waynoka, Oklahoma
- 1.7 17 km SSE of Waynoka, Oklahoma
- 1.7 17 km SSE of Waynoka, Oklahoma
- 1.5 16 km SE of Waynoka, Oklahoma
- 1.8 4 km WSW of Aline, Oklahoma
- 1.9 16 km SSE of Waynoka, 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.