Earthquake · reviewed by a seismologist
M 3.1ml
Earthquake near Woodward, OK
No earthquake was likely felt in Woodward in the 24 hours to 3:49 pm CST (21:49 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 3.1 earthquake was recorded 48 km (30 mi) east-southeast of Woodward, OK, at 1:33 pm CDT on 22 October 2018 (18:33 UTC), 4.0 km deep. 2 people have reported feeling it to USGS.
USGS: 0 km W of Chester, Oklahoma
- When
- 1:33 pm CDT on 22 October 2018 ()
- Where
- 48 km (30 mi) east-southeast of Woodward, OK · earthquakes near Woodward
- Oklahoma today
- every earthquake in Oklahoma in the last 24 hours
- Magnitude
- M 3.1 (ml)
- Depth
- 4.0 km below the surface
- Felt
- 2 reports · strongest reported intensity III
- Nearest
- Dewey County, 28 km SSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1557 days ago
Earthquake alerts for Woodward, 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 128 km (80 mi) from the epicentre. In Woodward, 48 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: Mooreland 35 km, intensity III · Fairview 41 km, intensity III · Woodward 48 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 250,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
- Magna, Utah 2020 M 5.7 7,900× the energy of this one
- This earthquake M 3.1 about 1,300 lb of TNT
- Around the size people start to feel M 3.0 this one released 1.4× 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 since 2016 was M 5.1 on 2016-02-13 — about 1,000 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 36.2176, -98.9302. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Dewey County, OK | 28 km (17 mi) | SSW | earthquakes near Dewey County |
| Major County, OK | 36 km (23 mi) | ENE | earthquakes near Major County |
| Woodward County, OK | 38 km (24 mi) | NW | earthquakes near Woodward County |
| Woods County, OK | 57 km (35 mi) | N | earthquakes near Woods County |
| Blaine County, OK | 59 km (37 mi) | SE | earthquakes near Blaine County |
| Custer County, OK | 64 km (40 mi) | S | earthquakes near Custer County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
52 earthquakes have been recorded within 50 km since this one.
- 1.9 10 km N of Chester, Oklahoma
- 1.7 9 km SW of Waynoka, Oklahoma
- 1.9 11 km N of Chester, Oklahoma
- 1.9 10 km SW of Waynoka, Oklahoma
- 2.1 9 km NE of Quinlan, Oklahoma
- 1.9 17 km SE of Waynoka, Oklahoma
- 1.9 9 km NE of Quinlan, Oklahoma
- 2.1 7 km SW of Avard, Oklahoma
- 2.3 1 km SSW of Chester, Oklahoma
- 2.5 4 km SE of Cleo Springs, Oklahoma
- 2.4 7 km NNE of Quinlan, Oklahoma
- 2.3 9 km NE of Quinlan, Oklahoma
- 2.3 8 km W of Fairview, Oklahoma
- 1.7 13 km SSE of Waynoka, Oklahoma
- 1.8 9 km NE of Quinlan, 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.