Earthquake · reviewed by a seismologist
M 3.9mwr
Earthquake near Enid, OK
No earthquake was likely felt in Enid in the 24 hours to 10:10 am CST (16:10 UTC). The last one was M 3.4, 89 km (55 mi) S, at 5:53 am CST on 7 November 2026, estimated intensity II (weak) in town; 23 felt reports to USGS. Every earthquake near Enid
This page: a magnitude 3.9 earthquake was recorded 35 km (22 mi) east-southeast of Enid, OK, at 10:07 am CDT on 6 April 2018 (15:07 UTC), 6.3 km deep. 38 people have reported feeling it to USGS.
USGS: 5 km WNW of Lucien, Oklahoma
91 km (57 mi) N of Oklahoma City, OK · 35 km (22 mi) ESE of Enid, OK
- When
- 10:07 am CDT on 6 April 2018 ()
- Where
- 35 km (22 mi) east-southeast of Enid, OK · earthquakes near Enid
- Oklahoma today
- every earthquake in Oklahoma in the last 24 hours
- Magnitude
- M 3.9 (mwr)
- Depth
- 6.3 km below the surface
- Felt
- 38 reports · strongest reported intensity VI
- Measured shaking
- intensity IV (ShakeMap)
- Nearest
- Noble County, 27 km ENE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2428 days ago
Earthquake alerts for Enid, 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 431 km (268 mi) from the epicentre. In Enid, 35 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: Perry 20 km, intensity IV · Enid 35 km, intensity IV · Crescent 38 km, intensity III · Hennessey 40 km, intensity III · Langston 44 km, intensity III · Stillwater 45 km, intensity III · Guthrie 46 km, intensity III. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 11 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.9 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 16,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 710× the energy of this one
- Magna, Utah 2020 M 5.7 500× the energy of this one
- This earthquake M 3.9 about 11 tons of TNT
- Around the size people start to feel M 3.0 this one released 22× 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 4.3 on 2017-09-08 — about 4 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 36.2854, -97.5106. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Noble County, OK | 27 km (17 mi) | ENE | earthquakes near Noble County |
| Garfield County, OK | 27 km (17 mi) | WNW | earthquakes near Garfield County |
| Logan County, OK | 42 km (26 mi) | S | earthquakes near Logan County |
| Payne County, OK | 53 km (33 mi) | ESE | earthquakes near Payne County |
| Kingfisher County, OK | 53 km (33 mi) | SW | earthquakes near Kingfisher County |
| Grant County, OK | 61 km (38 mi) | NNW | earthquakes near Grant County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
60 earthquakes have been recorded within 50 km since this one.
- 2.7 10 km SSE of Marshall, Oklahoma
- 2.6 10 km SE of Marshall, Oklahoma
- 2.8 10 km SSE of Marshall, Oklahoma
- 4.0 10 km SSE of Marshall, Oklahoma
- 2.4 10 km SSE of Marshall, Oklahoma
- 2.9 10 km SSE of Marshall, Oklahoma
- 2.3 10 km SSE of Marshall, Oklahoma
- 3.0 10 km SSE of Marshall, Oklahoma
- 2.6 10 km SSE of Marshall, Oklahoma
- 4.0 10 km SSE of Marshall, Oklahoma
- 2.5 10 km SSE of Marshall, Oklahoma
- 2.5 10 km SSE of Marshall, Oklahoma
- 3.0 10 km SSE of Marshall, Oklahoma
- 2.8 10 km SSE of Marshall, Oklahoma
- 3.7 10 km SSE of Marshall, 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.