QuakeIndex

quarry blast · reviewed by a seismologist

M 1.5ml

5 km SW of Ralston, Oklahoma

· 0.0 km deep · released about 5.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pawnee County 18 kmOsage County 38 kmNoble County 42 kmPayne County 46 kmKay County 51 kmCreek County 72 kmWashington County 82 kmTulsa County 84 kmLincoln County 85 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 1.5 (ml)
Depth
0.0 km below the surface
Felt
no reports yet
Nearest
Pawnee County, 18 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1634 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

USGS catalogues this as quarry blast, not an earthquake.

How big was it?

This earthquake released about 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 36.4658, -96.7788. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pawnee County, OK 18 km (11 mi) NNW of here earthquakes near Pawnee County
Osage County, OK 38 km (23 mi) WSW of here earthquakes near Osage County
Noble County, OK 42 km (26 mi) ENE of here earthquakes near Noble County
Payne County, OK 46 km (29 mi) NNE of here earthquakes near Payne County
Kay County, OK 51 km (31 mi) SE of here earthquakes near Kay County
Creek County, OK 72 km (45 mi) NNW of here earthquakes near Creek County

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

Aftershocks so far

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

  1. 1.6 11 km E of Red Rock, Oklahoma
  2. 2.6 8 km N of Morrison, Oklahoma
  3. 1.7 4 km ESE of Skedee, Oklahoma
  4. 1.9 9 km NNW of Pawnee, Oklahoma
  5. 3.0 9 km NNW of Pawnee, Oklahoma
  6. 2.4 3 km NE of Marland, Oklahoma
  7. 2.4 12 km N of Perry, Oklahoma
  8. 2.0 3 km NNE of Marland, Oklahoma
  9. 1.6 11 km E of Red Rock, Oklahoma
  10. 1.7 12 km NW of Pawnee, Oklahoma
  11. 1.6 11 km E of Red Rock, Oklahoma
  12. 1.7 6 km NNW of Marland, Oklahoma
  13. 2.5 6 km NNW of Marland, Oklahoma
  14. 1.6 11 km E of Red Rock, Oklahoma
  15. 1.9 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 5.8 on 2016-09-03 — it released about 2,700,000 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.