QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

7 km S of Byron, Oklahoma

· 5.3 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alfalfa County 12 kmHarper County 44 kmGrant County 44 kmWoods County 53 kmBarber County 56 kmMajor County 62 kmGarfield County 67 kmKingman County 81 kmSumner County 83 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 2.1 (ml)
Depth
5.3 km below the surface
Felt
no reports yet
Nearest
Alfalfa County, 12 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1986 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 36.8328, -98.2783. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alfalfa County, OK 12 km (8 mi) NNE of here earthquakes near Alfalfa County
Harper County, KS 44 km (27 mi) SSW of here earthquakes near Harper County
Grant County, OK 44 km (27 mi) W of here earthquakes near Grant County
Woods County, OK 53 km (33 mi) ENE of here earthquakes near Woods County
Barber County, KS 56 km (35 mi) SE of here earthquakes near Barber County
Major County, OK 62 km (39 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

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

  1. 1.5 5 km WSW of Aline, Oklahoma
  2. 2.0 7 km E of Nescatunga, Oklahoma
  3. 1.6 3 km SSW of Cherokee, Oklahoma
  4. 1.5 7 km E of Nescatunga, Oklahoma
  5. 2.5 0 km SW of Wakita, Oklahoma
  6. 1.7 8 km E of Nescatunga, Oklahoma
  7. 1.6 8 km E of Nescatunga, Oklahoma
  8. 1.8 1 km SSW of Wakita, Oklahoma
  9. 2.2 7 km E of Nescatunga, Oklahoma
  10. 3.0 8 km E of Nescatunga, Oklahoma
  11. 3.6 7 km E of Nescatunga, Oklahoma
  12. 3.8 7 km E of Nescatunga, Oklahoma
  13. 1.6 4 km NE of Cherokee, Oklahoma
  14. 1.9 7 km E of Nescatunga, Oklahoma
  15. 2.5 3 km SE of Nescatunga, 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 4.4 on 2018-06-09 — it released about 2,800 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.