QuakeIndex

Earthquake · reviewed by a seismologist

M 3.8mwr

3 km WNW of Byron, Oklahoma

· 7.7 km deep · released about 7.6 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alfalfa County 20 kmHarper County 39 kmBarber County 47 kmGrant County 50 kmWoods County 52 kmMajor County 69 kmKingman County 73 kmGarfield County 76 kmSumner County 82 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 3.8 (mwr)
Depth
7.7 km below the surface
Felt
124 reports · strongest reported intensity V
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Nearest
Alfalfa County, 20 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3033 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 124 people have reported feeling it to USGS.

How big was it?

This earthquake released about 7.6 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 22,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 710× the energy of this one
  4. This earthquake M 3.8 about 7.6 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 16× 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 36.9111, -98.3280. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alfalfa County, OK 20 km (13 mi) N of here earthquakes near Alfalfa County
Harper County, KS 39 km (24 mi) SW of here earthquakes near Harper County
Barber County, KS 47 km (29 mi) SE of here earthquakes near Barber County
Grant County, OK 50 km (31 mi) WNW of here earthquakes near Grant County
Woods County, OK 52 km (32 mi) ENE of here earthquakes near Woods County
Major County, OK 69 km (43 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

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

  1. 1.6 4 km NNW of Bluff City, Kansas
  2. 2.0 3 km WSW of Bluff City, Kansas
  3. 3.1 7 km E of Nescatunga, Oklahoma
  4. 2.5 7 km E of Nescatunga, Oklahoma
  5. 2.7 7 km E of Nescatunga, Oklahoma
  6. 3.0 4 km SE of Avard, Oklahoma
  7. 2.7 4 km SE of Avard, Oklahoma
  8. 2.8 7 km ENE of Nescatunga, Oklahoma
  9. 2.9 8 km E of Nescatunga, Oklahoma
  10. 2.9 8 km ENE of Nescatunga, Oklahoma
  11. 4.4 8 km E of Nescatunga, Oklahoma
  12. 1.7 5 km SSE of Bluff City, Kansas
  13. 2.4 Kansas
  14. 2.5 11 km NE of Wakita, Oklahoma
  15. 2.3 1 km N of Anthony, Kansas

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.