QuakeIndex

mining explosion · reviewed by a seismologist

M 3.5ml

10 km WSW of Upton, Wyoming

· 0.0 km deep · released about 2.7 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Weston County 30 kmCrook County 59 kmCampbell County 62 kmLawrence County 82 kmCuster County 113 kmNiobrara County 115 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 3.5 (ml)
Depth
0.0 km below the surface
Felt
no reports yet
Nearest
Weston County, 30 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2682 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 2.7 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 63,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,000× the energy of this one
  4. This earthquake M 3.5 about 2.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 5.6× 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 44.0777, -104.7602. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Weston County, WY 30 km (19 mi) NNW of here earthquakes near Weston County
Crook County, WY 59 km (37 mi) SSW of here earthquakes near Crook County
Campbell County, WY 62 km (38 mi) ESE of here earthquakes near Campbell County
Lawrence County, SD 82 km (51 mi) WSW of here earthquakes near Lawrence County
Custer County, SD 113 km (70 mi) WNW of here earthquakes near Custer County
Niobrara County, WY 115 km (72 mi) NNW of here earthquakes near Niobrara County

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

Aftershocks so far

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

  1. 3.5 20 km ENE of Wright, Wyoming
  2. 3.4 25 km ENE of Wright, Wyoming
  3. 3.5 27 km NE of Wright, Wyoming
  4. 3.5 20 km ENE of Wright, Wyoming
  5. 3.5 25 km NE of Wright, Wyoming
  6. 3.4 22 km ENE of Wright, Wyoming
  7. 3.2 22 km ENE of Wright, Wyoming
  8. 3.1 27 km NE of Wright, Wyoming
  9. 3.4 28 km NE of Wright, Wyoming
  10. 3.3 23 km ENE of Wright, Wyoming
  11. 3.7 22 km ENE of Wright, Wyoming
  12. 3.3 22 km ENE of Wright, Wyoming
  13. 3.0 25 km SSE of Sleepy Hollow, Wyoming
  14. 3.4 26 km NE 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.