QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

8 km NW of Healdton, Oklahoma

· 5.5 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Carter County 25 kmJefferson County 33 kmStephens County 35 kmLove County 46 kmMurray County 50 kmGarvin County 52 kmMontague County 69 kmCotton County 75 kmMarshall County 78 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
5.5 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Carter County, 25 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 922 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 14 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× the energy of this one
  4. This earthquake M 1.8 about 14 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 34.2825, -97.5568. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Carter County, OK 25 km (15 mi) W of here earthquakes near Carter County
Jefferson County, OK 33 km (20 mi) NE of here earthquakes near Jefferson County
Stephens County, OK 35 km (22 mi) SE of here earthquakes near Stephens County
Love County, OK 46 km (29 mi) NW of here earthquakes near Love County
Murray County, OK 50 km (31 mi) WSW of here earthquakes near Murray County
Garvin County, OK 52 km (33 mi) SSW of here earthquakes near Garvin County

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

Aftershocks so far

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

  1. 1.7 8 km SSE of Ratliff City, Oklahoma
  2. 1.6 4 km SE of Ratliff City, Oklahoma
  3. 1.6 5 km SSE of Ratliff City, Oklahoma
  4. 1.6 6 km SSE of Ratliff City, Oklahoma
  5. 1.5 5 km SSE of Ratliff City, Oklahoma
  6. 1.5 5 km SSE of Ratliff City, Oklahoma
  7. 1.7 6 km SE of Ratliff City, Oklahoma
  8. 1.7 4 km N of Velma, Oklahoma
  9. 1.6 7 km N of Velma, Oklahoma
  10. 1.5 4 km NNE of Velma, Oklahoma
  11. 1.9 4 km N of Velma, Oklahoma
  12. 1.7 4 km NNE of Velma, Oklahoma
  13. 1.6 3 km N of Velma, Oklahoma
  14. 1.9 5 km SE of Ratliff City, Oklahoma
  15. 1.5 8 km WNW of Davis, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.