QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

7 km SE of Byron, Oklahoma

· 6.5 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alfalfa County 15 kmGrant County 41 kmHarper County 41 kmWoods County 57 kmBarber County 57 kmMajor County 65 kmGarfield County 66 kmKingman County 79 kmSumner County 79 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 2.9 (ml)
Depth
6.5 km below the surface
Felt
no reports yet
Nearest
Alfalfa County, 15 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3329 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 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 36.8474, -98.2405. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alfalfa County, OK 15 km (9 mi) NNE of here earthquakes near Alfalfa County
Grant County, OK 41 km (25 mi) W of here earthquakes near Grant County
Harper County, KS 41 km (25 mi) SSW of here earthquakes near Harper County
Woods County, OK 57 km (35 mi) ENE of here earthquakes near Woods County
Barber County, KS 57 km (36 mi) SE of here earthquakes near Barber County
Major County, OK 65 km (41 mi) NNE of here earthquakes near Major County

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

Aftershocks so far

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

  1. 1.8 9 km SSE of Anthony, Kansas
  2. 1.6 9 km W of Bluff City, Kansas
  3. 2.3 Kansas
  4. 2.4 6 km NE of Carmen, Oklahoma
  5. 2.4 5 km NE of Carmen, Oklahoma
  6. 2.6 5 km NE of Carmen, Oklahoma
  7. 1.9 9 km W of Bluff City, Kansas
  8. 3.6 5 km NE of Carmen, Oklahoma
  9. 1.9 7 km SSW of Anthony, Kansas
  10. 2.2 7 km SE of Harper, Kansas
  11. 1.6 7 km SE of Harper, Kansas
  12. 3.5 7 km SE of Harper, Kansas
  13. 2.0 4 km NNW of Bluff City, Kansas
  14. 2.7 2 km ESE of Lambert, Oklahoma
  15. 2.2 7 km SSW of Helena, 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 4.0 on 2016-11-25 — it released about 45 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.