QuakeIndex

mining explosion · reviewed by a seismologist

M 3.3ml

37 km SE of Wright, Wyoming

· 0.0 km deep · released about 1.3 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Weston County 57 kmConverse County 69 kmNiobrara County 76 kmCampbell County 79 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 3.3 (ml)
Depth
0.0 km below the surface
Felt
no reports yet
Nearest
Weston County, 57 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1695 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

USGS catalogues this as mining explosion, not an earthquake.

How big was it?

This earthquake released about 1.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,000× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.8× 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 43.5356, -105.1382. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Weston County, WY 57 km (36 mi) SW of here earthquakes near Weston County
Converse County, WY 69 km (43 mi) NNE of here earthquakes near Converse County
Niobrara County, WY 76 km (47 mi) NW of here earthquakes near Niobrara County
Campbell County, WY 79 km (49 mi) SSE of here earthquakes near Campbell County
Crook County, WY 126 km (78 mi) SSW of here earthquakes near Crook County
Johnson County, WY 129 km (80 mi) ESE of here earthquakes near Johnson 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. 3.1 17 km ENE of Wright, Wyoming
  2. 3.1 17 km E of Wright, Wyoming
  3. 2.6 10 km ENE of Wright, Wyoming
  4. 3.3 20 km NE of Wright, Wyoming
  5. 3.0 32 km SE of Wright, Wyoming
  6. 3.0 10 km ESE of Wright, Wyoming
  7. 3.1 10 km E of Wright, Wyoming
  8. 3.0 15 km E of Wright, Wyoming
  9. 3.2 Wyoming
  10. 3.0 Wyoming
  11. 3.0 14 km ENE of Wright, Wyoming
  12. 3.2 16 km ESE of Wright, Wyoming
  13. 2.9 17 km E of Wright, Wyoming
  14. 2.9 8 km NNE of Wright, Wyoming
  15. 3.1 18 km E of Wright, Wyoming

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 2021-07-20 — it released about 11 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.