QuakeIndex

mining explosion · reviewed by a seismologist

M 2.9ml

8 km NNE of Wright, Wyoming

· 0.0 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Campbell County 41 kmWeston County 72 kmJohnson County 93 kmConverse County 93 kmCrook County 111 kmNiobrara County 117 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 2.9 (ml)
Depth
0.0 km below the surface
Felt
no reports yet
Nearest
Campbell County, 41 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1576 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 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 43.8233, -105.4642. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Campbell County, WY 41 km (26 mi) S of here earthquakes near Campbell County
Weston County, WY 72 km (45 mi) W of here earthquakes near Weston County
Johnson County, WY 93 km (58 mi) ESE of here earthquakes near Johnson County
Converse County, WY 93 km (58 mi) N of here earthquakes near Converse County
Crook County, WY 111 km (69 mi) SW of here earthquakes near Crook County
Niobrara County, WY 117 km (73 mi) NW of here earthquakes near Niobrara 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 26 km SE of Wright, Wyoming
  2. 3.1 40 km SE of Wright, Wyoming
  3. 3.3 14 km ENE of Wright, Wyoming
  4. 3.1 13 km ENE of Wright, Wyoming
  5. 3.3 7 km ESE of Wright, Wyoming
  6. 3.2 Wyoming
  7. 3.2 26 km SE of Wright, Wyoming
  8. 3.1 35 km SE of Wright, Wyoming
  9. 3.4 Wyoming
  10. 3.3 20 km SSE of Antelope Valley-Crestview, Wyoming
  11. 3.2 Wyoming
  12. 2.9 19 km SSE of Sleepy Hollow, Wyoming
  13. 3.0 14 km ENE of Wright, Wyoming
  14. 3.3 17 km ESE of Wright, Wyoming
  15. 3.2 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 45 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.