QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

10 km SW of Isabella, Oklahoma

· 4.8 km deep · released about 19 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Major County 20 kmBlaine County 32 kmKingfisher County 50 kmDewey County 57 kmGarfield County 61 kmAlfalfa County 63 kmWoods County 74 kmCuster County 78 kmCanadian County 80 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
4.8 km below the surface
Felt
no reports yet
Nearest
Major County, 20 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2169 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 19 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 5.8 810,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 580,000× the energy of this one
  3. Around the size people start to feel M 3.0 51× the energy of this one
  4. This earthquake M 1.9 about 19 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 36.1677, -98.4205. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Major County, OK 20 km (12 mi) SE of here earthquakes near Major County
Blaine County, OK 32 km (20 mi) N of here earthquakes near Blaine County
Kingfisher County, OK 50 km (31 mi) WNW of here earthquakes near Kingfisher County
Dewey County, OK 57 km (36 mi) ENE of here earthquakes near Dewey County
Garfield County, OK 61 km (38 mi) WSW of here earthquakes near Garfield County
Alfalfa County, OK 63 km (39 mi) S of here earthquakes near Alfalfa County

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

Aftershocks so far

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

  1. 1.9 5 km N of Ames, Oklahoma
  2. 1.8 7 km NNW of Loyal, Oklahoma
  3. 1.7 7 km NNW of Loyal, Oklahoma
  4. 2.3 7 km SSE of Meno, Oklahoma
  5. 1.6 17 km SSE of Waynoka, Oklahoma
  6. 1.6 4 km SE of Meno, Oklahoma
  7. 1.5 3 km SE of Meno, Oklahoma
  8. 1.9 1 km ESE of Hennessey, Oklahoma
  9. 1.8 17 km SSE of Waynoka, Oklahoma
  10. 1.8 2 km E of Hennessey, Oklahoma
  11. 1.5 1 km ESE of Hennessey, Oklahoma
  12. 1.9 Oklahoma
  13. 2.0 1 km SSE of Hennessey, Oklahoma
  14. 2.4 4 km W of Seiling, Oklahoma
  15. 1.5 16 km SE 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 72,000 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.