Earthquake · reviewed by a seismologist
M 4.2mwr
Earthquake near Perry, OK
No earthquake was likely felt in Perry in the 24 hours to 3:50 am CST (09:50 UTC). The last one was M 3.4, 102 km (63 mi) SW, at 5:53 am CST on 7 November 2026, estimated intensity II (weak) in town; 23 felt reports to USGS. Every earthquake near Perry
This page: a magnitude 4.2 earthquake was recorded 10 km (6 mi) northwest of Perry, OK, at 10:15 pm CDT on 20 June 2020 (03:15 UTC), 7.8 km deep. 1,768 people have reported feeling it to USGS.
USGS: 9 km NW of Perry, Oklahoma
36 km (22 mi) NW of Stillwater, OK · 100 km (62 mi) N of Oklahoma City, OK
- When
- 10:15 pm CDT on 20 June 2020 ()
- Where
- 10 km (6 mi) northwest of Perry, OK · earthquakes near Perry
- Oklahoma today
- every earthquake in Oklahoma in the last 24 hours
- Magnitude
- M 4.2 (mwr)
- Depth
- 7.8 km below the surface
- Felt
- 1,768 reports · strongest reported intensity VI
- Measured shaking
- intensity VI (ShakeMap)
- Nearest
- Noble County, 11 km ENE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2264 days ago
Earthquake alerts for Perry, OK
Get a notification in this browser when USGS records an earthquake near Perry, 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 521 km (324 mi) from the epicentre. In Perry, 10 km away, the estimate is intensity V (moderate). 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 10 km, intensity V · Stillwater 38 km, intensity IV · Ponca City 46 km, intensity IV · Enid 47 km, intensity IV · Langston 47 km, intensity IV · Pawnee 50 km, intensity IV · Crescent 50 km, intensity IV. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 30 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.2 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 5,600× the energy of this one
- Mineral, Virginia 2011 M 5.8 250× the energy of this one
- Magna, Utah 2020 M 5.7 180× the energy of this one
- This earthquake M 4.2 about 30 tons of TNT
- Around the size people start to feel M 3.0 this one released 63× 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 5.8 on 2016-09-03 — about 250 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 36.3588, -97.3588. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Noble County, OK | 11 km (7 mi) | ENE | earthquakes near Noble County |
| Garfield County, OK | 39 km (24 mi) | W | earthquakes near Garfield County |
| Payne County, OK | 46 km (29 mi) | SE | earthquakes near Payne County |
| Logan County, OK | 50 km (31 mi) | S | earthquakes near Logan County |
| Kay County, OK | 54 km (34 mi) | NNE | earthquakes near Kay County |
| Pawnee County, OK | 60 km (37 mi) | E | earthquakes near Pawnee 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.
- 2.3 10 km NW of Perry, Oklahoma
- 1.7 9 km NW of Perry, Oklahoma
- 1.6 5 km SW of Glencoe, Oklahoma
- 1.5 10 km NW of Perry, Oklahoma
- 1.7 3 km ENE of Douglas, Oklahoma
- 1.6 10 km NW of Perry, Oklahoma
- 1.6 9 km NW of Perry, Oklahoma
- 2.0 10 km NW of Perry, Oklahoma
- 1.5 9 km NW of Perry, Oklahoma
- 1.7 12 km E of Red Rock, Oklahoma
- 1.6 6 km NNE of Morrison, Oklahoma
- 1.6 8 km E of Orlando, Oklahoma
- 2.3 9 km NW of Perry, Oklahoma
- 1.6 9 km NW of Perry, Oklahoma
- 1.6 9 km W of Lamont, 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.