QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

13 km SSE of Freedom, Oklahoma

· 4.7 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Woods County 21 kmWoodward County 30 kmHarper County 55 kmMajor County 61 kmComanche County 61 kmAlfalfa County 68 kmBarber County 73 kmDewey County 75 kmEllis 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
Magnitude
M 3.1 (ml)
Depth
4.7 km below the surface
Felt
no reports yet
Nearest
Woods County, 21 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3537 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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.

Where

Epicentre 36.6502, -99.0777. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Woods County, OK 21 km (13 mi) WSW of here earthquakes near Woods County
Woodward County, OK 30 km (19 mi) NE of here earthquakes near Woodward County
Harper County, OK 55 km (34 mi) ESE of here earthquakes near Harper County
Major County, OK 61 km (38 mi) NW of here earthquakes near Major County
Comanche County, KS 61 km (38 mi) SSE of here earthquakes near Comanche County
Alfalfa County, OK 68 km (42 mi) W of here earthquakes near Alfalfa County

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

Aftershocks so far

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

  1. 2.6 Oklahoma
  2. 3.0 10 km SW of Waynoka, Oklahoma
  3. 2.5 9 km SW of Waynoka, Oklahoma
  4. 2.3 10 km SW of Waynoka, Oklahoma
  5. 3.4 9 km SW of Waynoka, Oklahoma
  6. 2.6 9 km SW of Waynoka, Oklahoma
  7. 3.4 9 km SW of Waynoka, Oklahoma
  8. 3.0 17 km SSE of Waynoka, Oklahoma
  9. 2.6 17 km SSE of Waynoka, Oklahoma
  10. 2.6 17 km SSE of Waynoka, Oklahoma
  11. 3.5 17 km SSE of Waynoka, Oklahoma
  12. 2.8 9 km SW of Waynoka, Oklahoma
  13. 3.1 9 km SW of Waynoka, Oklahoma
  14. 2.8 17 km SE of Waynoka, Oklahoma
  15. 2.6 9 km WSW of Waynoka, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.1 on 2016-02-13 — it released about 1,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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