QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

5 km NW of Alex, Oklahoma

· 6.4 km deep · released about 950 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grady County 10 kmMcClain County 34 kmStephens County 53 kmCleveland County 53 kmGarvin County 54 kmCaddo County 56 kmCanadian County 67 kmComanche County 68 kmOklahoma County 76 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 3.0 (ml)
Depth
6.4 km below the surface
Felt
5 reports · strongest reported intensity IV
Nearest
Grady County, 10 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3120 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 5 people have reported feeling it to USGS.

How big was it?

This earthquake released about 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 350,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 950 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 34.9544, -97.8208. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grady County, OK 10 km (6 mi) SE of here earthquakes near Grady County
McClain County, OK 34 km (21 mi) WSW of here earthquakes near McClain County
Stephens County, OK 53 km (33 mi) N of here earthquakes near Stephens County
Cleveland County, OK 53 km (33 mi) WSW of here earthquakes near Cleveland County
Garvin County, OK 54 km (33 mi) WNW of here earthquakes near Garvin County
Caddo County, OK 56 km (35 mi) ESE of here earthquakes near Caddo County

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

Aftershocks so far

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

  1. 3.0 9 km SSW of Washington, Oklahoma
  2. 2.4 8 km SE of Dibble, Oklahoma
  3. 2.0 3 km E of Dibble, Oklahoma
  4. 2.9 4 km ENE of Dibble, Oklahoma
  5. 2.6 2 km ENE of Dibble, Oklahoma
  6. 2.1 3 km ENE of Dibble, Oklahoma
  7. 2.6 9 km ESE of Dibble, Oklahoma
  8. 3.4 3 km ENE of Dibble, Oklahoma
  9. 2.0 4 km ENE of Dibble, Oklahoma
  10. 2.1 3 km ENE of Dibble, Oklahoma
  11. 2.2 3 km ENE of Dibble, Oklahoma
  12. 2.2 4 km ENE of Dibble, Oklahoma
  13. 1.7 4 km WSW of Cole, Oklahoma
  14. 2.1 8 km SE of Dibble, Oklahoma
  15. 2.3 5 km SSE of Cole, 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

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