QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2ml

3 km SSW of Alva, Oklahoma

· 11 km deep · released about 1,900 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Woods County 17 kmAlfalfa County 32 kmBarber County 50 kmMajor County 53 kmWoodward County 66 kmComanche County 68 kmHarper County 71 kmGrant County 80 kmHarper County 87 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 3.2 (ml)
Depth
11 km below the surface
Felt
5 reports · strongest reported intensity II
Nearest
Woods County, 17 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2903 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 5 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,900 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 180,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 7,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 5,600× the energy of this one
  4. This earthquake M 3.2 about 1,900 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 2× 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 36.7774, -98.6821. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Woods County, OK 17 km (11 mi) ENE of here earthquakes near Woods County
Alfalfa County, OK 32 km (20 mi) W of here earthquakes near Alfalfa County
Barber County, KS 50 km (31 mi) S of here earthquakes near Barber County
Major County, OK 53 km (33 mi) NNW of here earthquakes near Major County
Woodward County, OK 66 km (41 mi) NE of here earthquakes near Woodward County
Comanche County, KS 68 km (42 mi) SE of here earthquakes near Comanche County

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

Aftershocks so far

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

  1. 2.9 6 km NNE of Cherokee, Oklahoma
  2. 2.1 1 km ESE of Hazelton, Kansas
  3. 2.3 10 km SSE of Waldron, Kansas
  4. 2.0 2 km NW of Jet, Oklahoma
  5. 2.4 6 km NNE of Quinlan, Oklahoma
  6. 2.0 4 km NE of Cherokee, Oklahoma
  7. 2.2 19 km SSE of Waynoka, Oklahoma
  8. 2.6 6 km NW of Goltry, Oklahoma
  9. 3.0 16 km SSE of Waynoka, Oklahoma
  10. 3.1 17 km SSE of Waynoka, Oklahoma
  11. 2.9 17 km SSE of Waynoka, Oklahoma
  12. 2.5 17 km SE of Waynoka, Oklahoma
  13. 2.8 8 km SW of Waynoka, Oklahoma
  14. 2.6 8 km SE of Byron, Oklahoma
  15. 2.8 17 km SSE 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 710 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.