QuakeIndex

mining explosion · reviewed by a seismologist

M 2.4ml

33 km NNW of Gillette, Wyoming

· 0.0 km deep · released about 120 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Campbell County 44 kmCrook County 84 kmPowder River County 92 kmJohnson County 97 kmSheridan County 102 kmWeston County 118 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 2.4 (ml)
Depth
0.0 km below the surface
Felt
no reports yet
Nearest
Campbell County, 44 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1506 days ago

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

USGS catalogues this as mining explosion, not an earthquake.

How big was it?

This earthquake released about 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 89,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.9× the energy of this one
  4. This earthquake M 2.4 about 120 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 44.5830, -105.6277. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Campbell County, WY 44 km (28 mi) NNW of here earthquakes near Campbell County
Crook County, WY 84 km (52 mi) W of here earthquakes near Crook County
Powder River County, MT 92 km (57 mi) S of here earthquakes near Powder River County
Johnson County, WY 97 km (60 mi) NE of here earthquakes near Johnson County
Sheridan County, WY 102 km (63 mi) ESE of here earthquakes near Sheridan County
Weston County, WY 118 km (73 mi) NW of here earthquakes near Weston County

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

Aftershocks so far

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

  1. 2.4 2 km WSW of Gillette, Wyoming
  2. 2.8 6 km SSE of Sleepy Hollow, Wyoming
  3. 2.7 19 km NNE of Gillette, Wyoming
  4. 2.6 17 km NNE of Gillette, Wyoming
  5. 2.8 9 km NW of Gillette, Wyoming
  6. 2.5 3 km NNE of Gillette, Wyoming
  7. 3.1 7 km SE of Antelope Valley-Crestview, Wyoming
  8. 2.8 10 km NNW of Gillette, Wyoming
  9. 3.0 18 km N of Gillette, Wyoming
  10. 3.1 9 km NNW of Gillette, Wyoming
  11. 2.9 13 km NNE of Gillette, Wyoming
  12. 3.0 22 km N of Gillette, Wyoming
  13. 2.5 12 km NE of Sleepy Hollow, Wyoming
  14. 2.9 0 km W of Antelope Valley-Crestview, Wyoming
  15. 3.0 4 km NNW of Sleepy Hollow, 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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