Earthquake · reviewed by a seismologist
M 4.0mwr
Oklahoma
Yes. A magnitude 4.0 earthquake was recorded in Oklahoma, 68 km (42 mi) N of Oklahoma City, OK, at 3:56 pm CDT on 15 June 2018 (20:56 UTC), 6.6 km deep. 154 people have reported feeling it to USGS.
68 km (42 mi) N of Oklahoma City, OK · 44 km (27 mi) W of Stillwater, OK
- When
- Oklahoma today
- every earthquake in Oklahoma in the last 24 hours
- Magnitude
- M 4.0 (mwr)
- Depth
- 6.6 km below the surface
- Felt
- 154 reports · strongest reported intensity VI
- Measured shaking
- intensity V (ShakeMap)
- USGS impact alert
- green
- Nearest
- Logan County, 20 km SSE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2427 days ago
Earthquake alerts for Crescent, OK
Get a notification in this browser when USGS records an earthquake near Crescent, 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 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 461 km (286 mi) from the epicentre. 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: Crescent 14 km, intensity IV · Guthrie 25 km, intensity IV · Hennessey 31 km, intensity IV · Langston 31 km, intensity IV · Perry 34 km, intensity IV · Kingfisher 41 km, intensity III · Stillwater 45 km, intensity III · Enid 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 15 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 11,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 500× the energy of this one
- Magna, Utah 2020 M 5.7 350× the energy of this one
- This earthquake M 4.0 about 15 tons of TNT
- Around the size people start to feel M 3.0 this one released 32× 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 4.6 on 2018-04-09 — about 7.9 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 36.0742, -97.5593. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Logan County, OK | 20 km (13 mi) | SSE | earthquakes near Logan County |
| Kingfisher County, OK | 36 km (23 mi) | WSW | earthquakes near Kingfisher County |
| Garfield County, OK | 40 km (25 mi) | NNW | earthquakes near Garfield County |
| Noble County, OK | 45 km (28 mi) | NE | earthquakes near Noble County |
| Payne County, OK | 52 km (33 mi) | E | earthquakes near Payne County |
| Oklahoma County, OK | 59 km (37 mi) | SSE | earthquakes near Oklahoma County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
59 earthquakes have been recorded within 50 km since this one.
- 2.5 3 km NE of Arcadia, Oklahoma
- 2.0 0 km NNE of Coyle, Oklahoma
- 3.1 0 km NNW of Coyle, Oklahoma
- 2.6 4 km N of Breckinridge, Oklahoma
- 2.5 1 km N of Fairmont, Oklahoma
- 3.0 8 km W of Meridian, Oklahoma
- 2.4 4 km N of Breckinridge, Oklahoma
- 2.6 0 km NNE of Coyle, Oklahoma
- 2.8 2 km SSE of Marshall, Oklahoma
- 2.6 0 km NNW of Coyle, Oklahoma
- 3.3 Oklahoma
- 2.6 8 km NE of Marshall, Oklahoma
- 2.5 5 km N of Breckinridge, Oklahoma
- 2.7 0 km ENE of Coyle, Oklahoma
- 2.9 6 km SE of Meridian, 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.