QuakeIndex

mining explosion · reviewed by a seismologist

M 3.1ml

Earthquake near Antelope Valley-Crestview, WY

No earthquake was likely felt in Antelope Valley-Crestview in the 24 hours to 1:06 am MST (08:06 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 3.1 mining explosion was recorded 8 km (5 mi) southeast of Antelope Valley-Crestview, WY, at 1:43 pm MST on 4 January 2026 (20:43 UTC), less than 1 km deep.

USGS: 7 km SE of Antelope Valley-Crestview, Wyoming

1:43 pm MST, Jan 4, 2026 · · 0.0 km deep · released about 1,300 lb of TNT

Every earthquake near Antelope Valley-Crestview Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Campbell County 9 kmWeston County 76 kmCrook County 82 kmJohnson County 95 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
1:43 pm MST on 4 January 2026 ()
Where
8 km (5 mi) southeast of Antelope Valley-Crestview, WY · earthquakes near Antelope Valley-Crestview
Magnitude
M 3.1 (ml)
Depth
0.0 km below the surface
Felt
no reports yet
Nearest
Campbell County, 9 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 218 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 42 km (26 mi) from the epicentre. In Antelope Valley-Crestview, 8 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 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.

For this area

The largest earthquake within 50 km since 2016 was M 4.1 on 2023-01-23 — about 32 times the energy of this one.

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

  1. 5.0 37 km W of Gillette, Wyoming · 45 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 44.1692, -105.4131. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Campbell County, WY 9 km (5 mi) WNW earthquakes near Campbell County
Weston County, WY 76 km (47 mi) ESE earthquakes near Weston County
Crook County, WY 82 km (51 mi) NE earthquakes near Crook County
Johnson County, WY 95 km (59 mi) W earthquakes near Johnson County
Sheridan County, WY 135 km (84 mi) WNW earthquakes near Sheridan County

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

Aftershocks so far

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

  1. 3.4 18 km NNE of Wright, Wyoming
  2. 2.4 2 km WSW of Gillette, Wyoming
  3. 3.7 9 km ENE of Wright, Wyoming
  4. 2.8 6 km SSE of Sleepy Hollow, Wyoming
  5. 3.1 15 km SSE of Antelope Valley-Crestview, Wyoming
  6. 3.3 10 km ENE of Wright, Wyoming
  7. 3.2 13 km E of Wright, Wyoming
  8. 3.1 13 km ENE of Wright, Wyoming
  9. 3.2 13 km ENE of Wright, Wyoming
  10. 3.4 16 km ENE of Wright, Wyoming
  11. 3.1 22 km SSE of Antelope Valley-Crestview, Wyoming
  12. 3.3 18 km NE of Wright, Wyoming
  13. 3.1 9 km E of Wright, Wyoming
  14. 2.5 13 km SE of Sleepy Hollow, Wyoming
  15. 2.5 15 km E 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.