QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

4 km N of Ames, Oklahoma

· 7.5 km deep · released about 20 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Major County 32 kmGarfield County 37 kmKingfisher County 43 kmBlaine County 50 kmAlfalfa County 51 kmGrant County 66 kmLogan County 78 kmWoods County 78 kmDewey 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 1.9 (ml)
Depth
7.5 km below the surface
Felt
no reports yet
Nearest
Major County, 32 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2260 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 20 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 5.8 760,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 540,000× the energy of this one
  3. Around the size people start to feel M 3.0 48× the energy of this one
  4. This earthquake M 1.9 about 20 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 36.2842, -98.1823. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Major County, OK 32 km (20 mi) E of here earthquakes near Major County
Garfield County, OK 37 km (23 mi) WSW of here earthquakes near Garfield County
Kingfisher County, OK 43 km (27 mi) NNW of here earthquakes near Kingfisher County
Blaine County, OK 50 km (31 mi) NNE of here earthquakes near Blaine County
Alfalfa County, OK 51 km (32 mi) SSE of here earthquakes near Alfalfa County
Grant County, OK 66 km (41 mi) SSW of here earthquakes near Grant County

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

Aftershocks so far

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

  1. 2.1 2 km SE of Aline, Oklahoma
  2. 1.5 2 km SE of Aline, Oklahoma
  3. 1.6 3 km NE of Fairmont, Oklahoma
  4. 1.8 7 km W of Carmen, Oklahoma
  5. 1.6 4 km SE of Meno, Oklahoma
  6. 1.9 3 km SSE of Meno, Oklahoma
  7. 1.8 3 km SE of Meno, Oklahoma
  8. 2.9 3 km SE of Meno, Oklahoma
  9. 2.4 2 km SE of Meno, Oklahoma
  10. 3.5 3 km SE of Meno, Oklahoma
  11. 1.5 4 km SE of Meno, Oklahoma
  12. 1.9 3 km SE of Meno, Oklahoma
  13. 1.7 3 km SE of Meno, Oklahoma
  14. 1.8 3 km SE of Meno, Oklahoma
  15. 2.3 5 km NW of Ames, 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 4.2 on 2018-03-04 — it released about 3,000 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.