QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

Oklahoma

Yes. A magnitude 3.0 earthquake was recorded in Oklahoma, 71 km (44 mi) E of Oklahoma City, OK, at 1:02 am CDT on 20 September 2017 (06:02 UTC), 5.0 km deep. 5 people have reported feeling it to USGS.

71 km (44 mi) E of Oklahoma City, OK · 59 km (37 mi) ENE of Midwest City, OK

· 5.0 km deep · released about 950 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lincoln County 20 kmOkfuskee County 39 kmPottawatomie County 44 kmSeminole County 47 kmCreek County 50 kmOklahoma County 61 kmPayne County 61 kmCleveland County 66 kmOkmulgee County 70 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Oklahoma today
every earthquake in Oklahoma in the last 24 hours
Magnitude
M 3.0 (ml)
Depth
5.0 km below the surface
Felt
5 reports · strongest reported intensity III
Nearest
Lincoln County, 20 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3250 days ago

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 73 km (45 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: Prague 10 km, intensity III · Chandler 20 km, intensity III · Stroud 22 km, intensity III · Shawnee 31 km, intensity III · Luther 43 km, intensity II · Cushing 47 km, intensity II · Choctaw 49 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 350,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 950 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 1,000 times the energy of this one.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.7 8 km NW of Prague, Oklahoma · 4 km SW 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 35.5634, -96.7377. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Lincoln County, OK 20 km (13 mi) NW earthquakes near Lincoln County
Okfuskee County, OK 39 km (24 mi) ESE earthquakes near Okfuskee County
Pottawatomie County, OK 44 km (27 mi) SSW earthquakes near Pottawatomie County
Seminole County, OK 47 km (29 mi) SSE earthquakes near Seminole County
Creek County, OK 50 km (31 mi) NE earthquakes near Creek County
Oklahoma County, OK 61 km (38 mi) W earthquakes near Oklahoma County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

40 earthquakes have been recorded within 50 km since this one.

  1. 2.1 2 km NE of Agra, Oklahoma
  2. 2.3 4 km WNW of Cushing, Oklahoma
  3. 2.5 3 km ESE of Luther, Oklahoma
  4. 1.9 1 km NE of Kendrick, Oklahoma
  5. 2.4 2 km NE of Kendrick, Oklahoma
  6. 2.8 9 km WNW of Prague, Oklahoma
  7. 3.2 1 km ENE of Cushing, Oklahoma
  8. 2.4 11 km WSW of Shamrock, Oklahoma
  9. 2.5 4 km N of Harrah, Oklahoma
  10. 2.1 1 km SE of Choctaw, Oklahoma
  11. 2.4 8 km SSE of Sparks, Oklahoma
  12. 2.8 1 km NNW of Cushing, Oklahoma
  13. 3.0 10 km WSW of Shamrock, Oklahoma
  14. 2.5 3 km SE of Carney, Oklahoma
  15. 2.6 3 km ESE of Luther, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.