QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

1 km S of Hitchcock, Oklahoma

· 7.2 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Blaine County 11 kmKingfisher County 37 kmMajor County 44 kmCanadian County 57 kmDewey County 60 kmCuster County 68 kmGarfield County 69 kmLogan County 81 kmAlfalfa County 86 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 1.8 (ml)
Depth
7.2 km below the surface
Felt
no reports yet
Nearest
Blaine County, 11 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2309 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× the energy of this one
  4. This earthquake M 1.8 about 15 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 35.9548, -98.3473. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Blaine County, OK 11 km (7 mi) NE of here earthquakes near Blaine County
Kingfisher County, OK 37 km (23 mi) W of here earthquakes near Kingfisher County
Major County, OK 44 km (27 mi) SSE of here earthquakes near Major County
Canadian County, OK 57 km (35 mi) NW of here earthquakes near Canadian County
Dewey County, OK 60 km (37 mi) E of here earthquakes near Dewey County
Custer County, OK 68 km (42 mi) ENE of here earthquakes near Custer 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. 1.6 9 km WSW of Ringwood, Oklahoma
  2. 1.6 9 km ESE of Ames, Oklahoma
  3. 1.5 5 km NNE of Ames, Oklahoma
  4. 1.5 3 km SE of Meno, Oklahoma
  5. 1.7 5 km NNE of Ames, Oklahoma
  6. 3.0 5 km N of Ames, Oklahoma
  7. 1.8 6 km NNE of Loyal, Oklahoma
  8. 1.5 2 km S of Ames, Oklahoma
  9. 1.5 3 km SE of Meno, Oklahoma
  10. 1.9 2 km SSE of Ames, Oklahoma
  11. 1.5 7 km N of Ames, Oklahoma
  12. 1.5 7 km N of Ames, Oklahoma
  13. 2.2 5 km N of Ames, Oklahoma
  14. 1.7 3 km NNE of Okeene, Oklahoma
  15. 1.7 7 km S of Meno, 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 4.1 on 2016-01-18 — it released about 2,900 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.