QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

6 km SW of Braman, Oklahoma

· 7.6 km deep · released about 25 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kay County 22 kmGrant County 38 kmSumner County 41 kmNoble County 56 kmCowley County 62 kmGarfield County 67 kmHarper County 70 kmAlfalfa County 86 kmPawnee 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 1.9 (ml)
Depth
7.6 km below the surface
Felt
no reports yet
Nearest
Kay County, 22 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2301 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 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 620,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 440,000× the energy of this one
  3. Around the size people start to feel M 3.0 39× the energy of this one
  4. This earthquake M 1.9 about 25 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 36.8797, -97.3762. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kay County, OK 22 km (14 mi) WNW of here earthquakes near Kay County
Grant County, OK 38 km (24 mi) ENE of here earthquakes near Grant County
Sumner County, KS 41 km (25 mi) SSE of here earthquakes near Sumner County
Noble County, OK 56 km (35 mi) NNW of here earthquakes near Noble County
Cowley County, KS 62 km (39 mi) SW of here earthquakes near Cowley County
Garfield County, OK 67 km (42 mi) NNE of here earthquakes near Garfield County

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

Aftershocks so far

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

  1. 1.8 7 km N of Nardin, Oklahoma
  2. 2.1 10 km ESE of Jefferson, Oklahoma
  3. 1.8 7 km NNE of Nardin, Oklahoma
  4. 1.7 6 km NW of Lamont, Oklahoma
  5. 2.1 7 km N of Nardin, Oklahoma
  6. 1.6 9 km ESE of Jefferson, Oklahoma
  7. 1.6 10 km W of Lamont, Oklahoma
  8. 1.7 3 km N of Medford, Oklahoma
  9. 2.0 9 km WSW of Hunnewell, Kansas
  10. 2.2 6 km N of Nardin, Oklahoma
  11. 1.6 10 km ESE of Jefferson, Oklahoma
  12. 2.1 6 km N of Nardin, Oklahoma
  13. 2.7 7 km N of Nardin, Oklahoma
  14. 2.4 7 km N of Nardin, Oklahoma
  15. 1.7 9 km NW of Tonkawa, 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 2019-05-17 — it released about 4,900 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.