QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

Earthquake near Holdenville, OK

USGS: 5 km ESE of Horntown, Oklahoma

8:39 pm CDT, Apr 26, 2018 · · 4.1 km deep · released about 60 lb of TNT

Every earthquake near Holdenville Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hughes County 5 kmSeminole County 39 kmPittsburg County 43 kmOkfuskee County 46 kmCoal County 54 kmMcIntosh County 58 kmPontotoc County 59 kmOkmulgee County 68 kmPottawatomie County 71 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
8:39 pm CDT on 26 April 2018 ()
Where
19 km (12 mi) E of Holdenville, OK · earthquakes near Holdenville
Magnitude
M 2.2 (ml)
Depth
4.1 km below the surface
Felt
no reports yet
Nearest
Hughes County, 5 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2991 days ago

A magnitude 2.2 earthquake was recorded 19 km (12 mi) E of Holdenville, OK, at 8:39 pm CDT on 26 April 2018 (01:39 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Wetumka, Wewoka.

How big was it?

This earthquake released about 60 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 250,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 60 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 35.0636, -96.1926. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Hughes County, OK 5 km (3 mi) WSW earthquakes near Hughes County
Seminole County, OK 39 km (24 mi) WNW earthquakes near Seminole County
Pittsburg County, OK 43 km (27 mi) ESE earthquakes near Pittsburg County
Okfuskee County, OK 46 km (29 mi) NNW earthquakes near Okfuskee County
Coal County, OK 54 km (34 mi) S earthquakes near Coal County
McIntosh County, OK 58 km (36 mi) NE earthquakes near McIntosh 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. 1.9 4 km SE of Lamar, Oklahoma
  2. 2.5 6 km S of Yeager, Oklahoma
  3. 1.6 Oklahoma
  4. 2.3 5 km WNW of Cromwell, Oklahoma
  5. 1.7 6 km SSE of Yeager, Oklahoma
  6. 2.2 7 km SSW of Dustin, Oklahoma
  7. 1.5 7 km SE of Calvin, Oklahoma
  8. 2.0 9 km WNW of Ashland, Oklahoma
  9. 1.9 6 km SSE of Yeager, Oklahoma
  10. 2.0 7 km N of Atwood, Oklahoma
  11. 2.2 7 km N of Atwood, Oklahoma
  12. 1.7 4 km NW of Cromwell, Oklahoma
  13. 1.5 2 km S of Ashland, Oklahoma
  14. 1.7 6 km SSE of Yeager, Oklahoma
  15. 1.6 3 km WSW of Ashland, 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.