QuakeIndex

mining explosion · reviewed by a seismologist

M 3.1ml

19 km W of Gillette, Wyoming

· 0.0 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Campbell County 23 kmJohnson County 73 kmCrook County 99 kmSheridan County 104 kmWeston County 107 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 3.1 (ml)
Depth
0.0 km below the surface
Felt
no reports yet
Nearest
Campbell County, 23 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1800 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 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 44.3105, -105.7465. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Campbell County, WY 23 km (14 mi) NW of here earthquakes near Campbell County
Johnson County, WY 73 km (46 mi) ENE of here earthquakes near Johnson County
Crook County, WY 99 km (61 mi) WSW of here earthquakes near Crook County
Sheridan County, WY 104 km (65 mi) ESE of here earthquakes near Sheridan County
Weston County, WY 107 km (67 mi) WNW of here earthquakes near Weston County

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

Aftershocks so far

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

  1. 3.3 22 km SSE of Antelope Valley-Crestview, Wyoming
  2. 3.0 16 km SSE of Sleepy Hollow, Wyoming
  3. 2.9 26 km NNE of Wright, Wyoming
  4. 2.9 20 km NNW of Gillette, Wyoming
  5. 3.0 Wyoming
  6. 2.7 5 km W of Gillette, Wyoming
  7. 2.9 16 km SSE of Antelope Valley-Crestview, Wyoming
  8. 2.8 6 km WNW of Gillette, Wyoming
  9. 3.0 6 km NW of Gillette, Wyoming
  10. 2.8 24 km S of Antelope Valley-Crestview, Wyoming
  11. 3.2 11 km NNE of Gillette, Wyoming
  12. 3.1 19 km SSE of Sleepy Hollow, Wyoming
  13. 2.9 18 km NNE of Wright, Wyoming
  14. 2.6 3 km NNE of Antelope Valley-Crestview, Wyoming
  15. 2.5 9 km NNW of Gillette, 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.

On USGS

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