QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4ml

9 km ESE of Medford, Oklahoma

· 8.8 km deep · released about 1.9 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Grant County 13 kmKay County 44 kmGarfield County 45 kmSumner County 54 kmNoble County 56 kmHarper County 60 kmAlfalfa County 61 kmCowley County 88 kmKingfisher County 95 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 3.4 (ml)
Depth
8.8 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Grant County, 13 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3420 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.9 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 89,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,800× the energy of this one
  4. This earthquake M 3.4 about 1.9 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4× more

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 36.7675, -97.6396. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Grant County, OK 13 km (8 mi) E of here earthquakes near Grant County
Kay County, OK 44 km (28 mi) W of here earthquakes near Kay County
Garfield County, OK 45 km (28 mi) NNE of here earthquakes near Garfield County
Sumner County, KS 54 km (33 mi) SSW of here earthquakes near Sumner County
Noble County, OK 56 km (35 mi) NW of here earthquakes near Noble County
Harper County, KS 60 km (37 mi) SE of here earthquakes near Harper County

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

Aftershocks so far

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

  1. 2.1 11 km NNW of Caldwell, Kansas
  2. 2.7 12 km NNW of Caldwell, Kansas
  3. 1.7 9 km W of Bluff City, Kansas
  4. 2.0 9 km W of Bluff City, Kansas
  5. 2.6 9 km ESE of Wakita, Oklahoma
  6. 1.9 10 km WNW of Caldwell, Kansas
  7. 2.5 10 km SSE of Waldron, Kansas
  8. 2.2 8 km NNW of Wakita, Oklahoma
  9. 2.7 5 km SSE of Pond Creek, Oklahoma
  10. 2.5 12 km SSE of Waldron, Kansas
  11. 4.1 8 km W of Deer Creek, Oklahoma
  12. 3.8 4 km ENE of Pond Creek, Oklahoma
  13. 2.5 2 km ENE of South Haven, Kansas
  14. 2.1 8 km ESE of Caldwell, Kansas
  15. 1.6 5 km SSE of Freeport, Kansas

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 4.0 on 2016-11-25 — it released about 7.9 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.