Oklahoma earthquakes

M2.9 earthquake 1 km E of Spencer, Oklahoma

A magnitude 2.9 earthquake struck 1 km E of Spencer, Oklahoma on Tue, Aug 23, 2011, 5:40 PM CDT (22:40 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.3 5 km SW of Luther, Oklahoma. This one was a foreshock.

Spencer forecastMore in Oklahoma

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.9 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2011-08-23 22:40:40 UTC
Depth
7.0 km (4.3 mi), shallow
Epicenter
35.521° N, 97.364° W
Region
Oklahoma
Felt reports
58
Tsunami flag
No
Status
Reviewed by a seismologist

What happened

The USGS’s account of the effects of this earthquake.

Felt (IV) at Oklahoma City and Spencer and (III) at Choctaw. Also felt at Jones.

From the USGS event page for usp000j6xn. U.S. Geological Survey text and figures are in the public domain.

Did you feel it?

58 people reported to the USGS what they felt; the strongest reported shaking was IV, light shaking.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Station coverage gap
65°
Stations used
20

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 3.01 km E of Choctaw, Oklahoma · 5511 days ago · 3 km deep · 11 km away · felt by 66
  2. 2.65 km SW of Luther, Oklahoma · 5511 days ago · 3 km deep · 16 km away
  3. 2.52 km ESE of Arcadia, Oklahoma · 5511 days ago · 3 km deep · 16 km away
  4. 2.72 km W of Luther, Oklahoma · 5507 days ago · 3 km deep · 21 km away · felt by 11
  5. 2.70 km ENE of Spencer, Oklahoma · 5506 days ago · 3 km deep · 1 km away · felt by 11
  6. 3.05 km NE of McLoud, Oklahoma · 5506 days ago · 5 km deep · 30 km away · felt by 11
  7. 2.42 km SW of Luther, Oklahoma · 5501 days ago · 3 km deep · 19 km away
  8. 3.35 km SW of Luther, Oklahoma · 5499 days ago · 3 km deep · 16 km away · felt by 29
  9. 2.62 km E of Choctaw, Oklahoma · 5493 days ago · 4 km deep · 11 km away
  10. 2.50 km SSE of Jones, Oklahoma · 5480 days ago · 4 km deep · 9 km away
  11. 3.03 km ENE of Choctaw, Oklahoma · 5477 days ago · 4 km deep · 12 km away
  12. 2.510 km W of Shamrock, Oklahoma · 5468 days ago · 5 km deep · 74 km away
  13. 2.93 km WSW of Nicoma Park, Oklahoma · 5464 days ago · 5 km deep · 5 km away · felt by 259

Before

  1. 2.51 km ENE of Spencer, Oklahoma · 5520 days ago · 5 km deep · 1 km away · felt by 11
  2. 3.03 km W of Bradley, Oklahoma · 5524 days ago · 5 km deep · 79 km away · felt by 11
  3. 2.73 km NE of Midwest City, Oklahoma · 5526 days ago · 15 km deep · 6 km away
  4. 2.13 km NW of Harrah, Oklahoma · 5526 days ago · 5 km deep · 15 km away
  5. 2.52 km ESE of Arcadia, Oklahoma · 5532 days ago · 5 km deep · 16 km away
  6. 2.54 km NNE of Midwest City, Oklahoma · 5535 days ago · 4 km deep · 5 km away · felt by 85
  7. 2.50 km SW of Del City, Oklahoma · 5536 days ago · 5 km deep · 12 km away · felt by 24
  8. 3.04 km NE of Choctaw, Oklahoma · 5542 days ago · 5 km deep · 12 km away · felt by 28
  9. 2.61 km E of Choctaw, Oklahoma · 5544 days ago · 8 km deep · 10 km away
  10. 2.71 km E of Choctaw, Oklahoma · 5544 days ago · 8 km deep · 11 km away
  11. 2.3Oklahoma · 5546 days ago · 8 km deep · 11 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp000j6xn (also filed as usc0005isz). Read Fri, Oct 2, 2026, 10:58 PM UTC.