QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

26 km NW of Freedom, Oklahoma

· 0.1 km deep · released about 480 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Comanche County 26 kmHarper County 36 kmWoods County 46 kmClark County 55 kmWoodward County 59 kmBarber County 62 kmKiowa County 68 kmEllis County 90 kmAlfalfa County 91 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 2.8 (ml)
Depth
0.1 km below the surface
Felt
no reports yet
Nearest
Comanche County, 26 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3082 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 480 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 32,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 2× the energy of this one
  4. This earthquake M 2.8 about 480 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.

Where

Epicentre 36.9516, -99.3021. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Comanche County, KS 26 km (16 mi) S of here earthquakes near Comanche County
Harper County, OK 36 km (23 mi) ENE of here earthquakes near Harper County
Woods County, OK 46 km (29 mi) WNW of here earthquakes near Woods County
Clark County, KS 55 km (34 mi) SE of here earthquakes near Clark County
Woodward County, OK 59 km (36 mi) N of here earthquakes near Woodward County
Barber County, KS 62 km (39 mi) WSW of here earthquakes near Barber County

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

Aftershocks so far

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

  1. 1.6 11 km W of Waynoka, Oklahoma
  2. 1.7 14 km SSE of Freedom, Oklahoma
  3. 1.7 15 km SSE of Freedom, Oklahoma
  4. 2.7 16 km SSW of Freedom, Oklahoma
  5. 2.4 14 km SSE of Freedom, Oklahoma
  6. 2.8 14 km SSE of Freedom, Oklahoma
  7. 2.9 14 km SSE of Freedom, Oklahoma
  8. 2.8 23 km NE of Fort Supply, Oklahoma
  9. 2.6 15 km SSW of Freedom, Oklahoma
  10. 2.5 14 km WNW of Waynoka, Oklahoma
  11. 2.6 14 km WNW of Waynoka, Oklahoma
  12. 2.9 14 km SSE of Freedom, Oklahoma
  13. 2.1 6 km WNW of Buffalo, Oklahoma
  14. 2.3 8 km W of Buffalo, Oklahoma
  15. 2.8 22 km NE of Fort Supply, 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.