QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

Earthquake near McAlester, OK

No earthquake was likely felt in McAlester in the 24 hours to 12:15 pm CST (18:15 UTC). The last one was M 3.4, 220 km (136 mi) WNW, at 5:53 am CST on 7 November 2026, estimated intensity II (weak) in town; 23 felt reports to USGS. Every earthquake near McAlester

This page: a magnitude 2.7 earthquake was recorded 17 km (11 mi) north-northeast of McAlester, OK, at 2:51 am CDT on 10 September 2018 (07:51 UTC), 2.4 km deep. 1 person has reported feeling it to USGS.

USGS: 6 km SSW of Crowder, Oklahoma

2:51 am CDT, Sep 10, 2018 · · 2.4 km deep · released about 340 lb of TNT

Every earthquake near McAlester Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pittsburg County 17 kmMcIntosh County 33 kmLatimer County 43 kmHughes County 52 kmHaskell County 55 kmMuskogee County 67 kmOkmulgee County 69 kmOkfuskee County 73 kmCoal County 77 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
2:51 am CDT on 10 September 2018 ()
Where
17 km (11 mi) north-northeast of McAlester, OK · earthquakes near McAlester
Oklahoma today
every earthquake in Oklahoma in the last 24 hours
Magnitude
M 2.7 (ml)
Depth
2.4 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Pittsburg County, 17 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1556 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 56 km (35 mi) from the epicentre. In McAlester, 17 km away, the estimate is intensity III (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: McAlester 17 km, intensity III · Quinton 29 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.8× the energy of this one
  4. This earthquake M 2.7 about 340 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

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 35.0709, -95.6841. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Pittsburg County, OK 17 km (11 mi) SSW earthquakes near Pittsburg County
McIntosh County, OK 33 km (21 mi) N earthquakes near McIntosh County
Latimer County, OK 43 km (27 mi) ESE earthquakes near Latimer County
Hughes County, OK 52 km (32 mi) W earthquakes near Hughes County
Haskell County, OK 55 km (34 mi) ENE earthquakes near Haskell County
Muskogee County, OK 67 km (41 mi) NNE earthquakes near Muskogee 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.

  1. 3.7 1 km ENE of Quinton, Oklahoma
  2. 2.0 1 km N of Quinton, Oklahoma
  3. 2.6 1 km NNE of Quinton, Oklahoma
  4. 2.1 2 km N of Quinton, Oklahoma
  5. 2.6 2 km NNE of Quinton, Oklahoma
  6. 2.6 1 km NNE of Quinton, Oklahoma
  7. 2.2 1 km NNE of Quinton, Oklahoma
  8. 2.8 2 km ENE of Quinton, Oklahoma
  9. 2.2 5 km S of Dustin, Oklahoma
  10. 2.6 1 km NE of Quinton, Oklahoma
  11. 1.9 2 km N of Quinton, Oklahoma
  12. 2.1 2 km ENE of Quinton, Oklahoma
  13. 1.7 1 km NNE of Quinton, Oklahoma
  14. 3.2 1 km NE of Quinton, Oklahoma
  15. 2.2 1 km NNE of Quinton, 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.