QuakeIndex

mining explosion · reviewed by a seismologist

M 2.3ml

Earthquake near Antelope Valley-Crestview, WY

No earthquake was likely felt in Antelope Valley-Crestview in the 24 hours to 6:33 pm MST (01:33 UTC). The last one was M 3.4, 37 km (23 mi) SSE, at 2:13 pm MDT on 6 July 2026, estimated intensity II (weak) in town. Every earthquake near Antelope Valley-Crestview

No: USGS classifies this as a mining explosion, not an earthquake. A magnitude 2.3 mining explosion was recorded 3 km (2 mi) south of Antelope Valley-Crestview, WY, at 4:07 pm MST on 18 November 2021 (23:07 UTC), less than 1 km deep.

USGS: 2 km S of Antelope Valley-Crestview, Wyoming

4:07 pm MST, Nov 18, 2021 · · 0.0 km deep · released about 85 lb of TNT

Every earthquake near Antelope Valley-Crestview Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Campbell County 4 kmWeston County 82 kmCrook County 84 kmJohnson County 91 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
4:07 pm MST on 18 November 2021 ()
Where
3 km (2 mi) south of Antelope Valley-Crestview, WY · earthquakes near Antelope Valley-Crestview
Magnitude
M 2.3 (ml)
Depth
0.0 km below the surface
Felt
no reports yet
Nearest
Campbell County, 4 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1754 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 20 km (12 mi) from the epicentre. In Antelope Valley-Crestview, 3 km away, the estimate is intensity III (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Earthquakes near other towns within 30 km: Sleepy Hollow, Gillette.

USGS catalogues this as mining explosion, not an earthquake.

How big was it?

This earthquake released about 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 85 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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.0 37 km W of Gillette, Wyoming · 40 km W of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 44.2001, -105.4710. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Campbell County, WY 4 km (2 mi) WSW earthquakes near Campbell County
Weston County, WY 82 km (51 mi) ESE earthquakes near Weston County
Crook County, WY 84 km (52 mi) ENE earthquakes near Crook County
Johnson County, WY 91 km (56 mi) W earthquakes near Johnson County
Sheridan County, WY 129 km (80 mi) WNW earthquakes near Sheridan County

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

Aftershocks so far

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

  1. 3.2 13 km ENE of Wright, Wyoming
  2. 3.1 18 km ENE of Wright, Wyoming
  3. 3.4 14 km ENE of Wright, Wyoming
  4. 3.0 22 km N of Gillette, Wyoming
  5. 3.1 23 km S of Antelope Valley-Crestview, Wyoming
  6. 2.8 Wyoming
  7. 2.9 22 km SSE of Sleepy Hollow, Wyoming
  8. 3.2 15 km ENE of Wright, Wyoming
  9. 2.7 3 km NW of Gillette, Wyoming
  10. 3.1 17 km ENE of Wright, Wyoming
  11. 2.6 10 km ENE of Wright, Wyoming
  12. 3.3 20 km NE of Wright, Wyoming
  13. 3.0 4 km SSE of Sleepy Hollow, Wyoming
  14. 3.1 10 km E of Wright, Wyoming
  15. 3.0 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.