Earthquake · reviewed by a seismologist
M 1.6ml
Earthquake near Luther, OK
No earthquake was likely felt in Luther in the 24 hours to 10:11 am CST (16:11 UTC). The last one was M 3.4, 77 km (48 mi) W, at 5:53 am CST on 7 November 2026, estimated intensity II (weak) in town; 23 felt reports to USGS. Every earthquake near Luther
This page: a magnitude 1.6 earthquake was recorded 6 km (4 mi) east-southeast of Luther, OK, at 11:58 pm CDT on 21 April 2021 (04:58 UTC), 7.3 km deep.
USGS: 6 km ESE of Luther, Oklahoma
40 km (25 mi) ENE of Oklahoma City, OK · 26 km (16 mi) E of Edmond, OK
- When
- 11:58 pm CDT on 21 April 2021 ()
- Where
- 6 km (4 mi) east-southeast of Luther, OK · earthquakes near Luther
- Oklahoma today
- every earthquake in Oklahoma in the last 24 hours
- Magnitude
- M 1.6 (ml)
- Depth
- 7.3 km below the surface
- Felt
- no reports yet
- Nearest
- Lincoln County, 23 km ENE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2029 days ago
Earthquake alerts for Luther, OK
Get a notification in this browser when USGS records an earthquake near Luther, 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 6 km (4 mi) from the epicentre. In Luther, 6 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: Luther 6 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 8.7 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 1,700,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
- Around the size people start to feel M 3.0 110× the energy of this one
- This earthquake M 1.6 about 8.7 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 5.0 on 2016-11-07 — about 110,000 times the energy of this one.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.7 8 km NW of Prague, Oklahoma · 35 km ESE of this epicentre
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 35.6450, -97.1285. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Lincoln County, OK | 23 km (14 mi) | ENE | earthquakes near Lincoln County |
| Oklahoma County, OK | 27 km (17 mi) | WSW | earthquakes near Oklahoma County |
| Logan County, OK | 42 km (26 mi) | NW | earthquakes near Logan County |
| Payne County, OK | 50 km (31 mi) | NNE | earthquakes near Payne County |
| Pottawatomie County, OK | 51 km (31 mi) | SSE | earthquakes near Pottawatomie County |
| Cleveland County, OK | 52 km (32 mi) | SSW | earthquakes near Cleveland County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
55 earthquakes have been recorded within 50 km since this one.
- 1.8 8 km NW of Prague, Oklahoma
- 1.9 8 km NW of Prague, Oklahoma
- 2.1 8 km NW of Prague, Oklahoma
- 2.1 4 km NE of Coyle, Oklahoma
- 2.0 10 km WSW of Shamrock, Oklahoma
- 1.8 6 km W of Johnson, Oklahoma
- 1.8 7 km WSW of Shamrock, Oklahoma
- 1.6 8 km NW of Prague, Oklahoma
- 1.9 5 km ESE of Meeker, Oklahoma
- 2.0 5 km N of Stroud, Oklahoma
- 2.2 10 km WSW of Shamrock, Oklahoma
- 1.9 8 km SSW of Warwick, Oklahoma
- 1.7 8 km SSW of Warwick, Oklahoma
- 2.8 8 km SSW of Warwick, Oklahoma
- 1.6 2 km WNW of Cushing, 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.