QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

43 km WSW of Gillette, Wyoming

· 14 km deep · released about 950 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Campbell County 40 kmJohnson County 48 kmSheridan County 98 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 3.0 (ml)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Campbell County, 40 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3574 days ago

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

How big was it?

This earthquake released about 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 350,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 950 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 44.1590, -106.0118. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Campbell County, WY 40 km (25 mi) W of here earthquakes near Campbell County
Johnson County, WY 48 km (30 mi) ENE of here earthquakes near Johnson County
Sheridan County, WY 98 km (61 mi) SE of here earthquakes near Sheridan County
Weston County, WY 120 km (75 mi) WNW of here earthquakes near Weston County
Crook County, WY 124 km (77 mi) WSW of here earthquakes near Crook County

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

Aftershocks so far

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

  1. 2.8 Wyoming
  2. 2.7 3 km NW of Gillette, Wyoming
  3. 2.4 23 km SSW of Antelope Valley-Crestview, Wyoming
  4. 2.1 21 km NW of Gillette, Wyoming
  5. 2.5 18 km NNW of Gillette, Wyoming
  6. 3.2 7 km NNE of Gillette, Wyoming
  7. 2.3 2 km S of Antelope Valley-Crestview, Wyoming
  8. 3.2 11 km SSW of Antelope Valley-Crestview, Wyoming
  9. 3.1 19 km W of Gillette, Wyoming
  10. 2.8 Wyoming
  11. 3.0 22 km WNW of Gillette, Wyoming
  12. 2.9 13 km NNW of Gillette, Wyoming
  13. 3.3 21 km N of Wright, Wyoming
  14. 2.8 4 km NNW of Gillette, Wyoming
  15. 2.7 24 km NNW 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.