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 6:56 pm MST (01:56 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 23 km (14 mi) south-southeast of Antelope Valley-Crestview, WY, at 12:39 pm MST on 22 January 2021 (19:39 UTC), less than 1 km deep.
USGS: 22 km SSE of Antelope Valley-Crestview, Wyoming
- When
- 12:39 pm MST on 22 January 2021 ()
- Where
- 23 km (14 mi) south-southeast 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, 21 km NNW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2038 days ago
Earthquake alerts for Antelope Valley-Crestview, WY
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Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
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, 23 km away, the estimate is intensity II (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.
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.
- Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
- Magna, Utah 2020 M 5.7 130,000× the energy of this one
- Around the size people start to feel M 3.0 11× the energy of this one
- 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 since 1900 lists no earthquake of M5 or more within 50 km.
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 44.0273, -105.3892. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Campbell County, WY | 21 km (13 mi) | NNW | earthquakes near Campbell County |
| Weston County, WY | 69 km (43 mi) | ESE | earthquakes near Weston County |
| Crook County, WY | 90 km (56 mi) | NE | earthquakes near Crook County |
| Johnson County, WY | 96 km (60 mi) | W | earthquakes near Johnson County |
| Converse County, WY | 116 km (72 mi) | S | earthquakes near Converse County |
| Niobrara County, WY | 130 km (81 mi) | SE | earthquakes near Niobrara County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
59 earthquakes have been recorded within 50 km since this one.
- 2.8 21 km SSE of Sleepy Hollow, Wyoming
- 4.0 26 km ESE of Wright, Wyoming
- 2.9 20 km SE of Sleepy Hollow, Wyoming
- 3.3 16 km E of Wright, Wyoming
- 2.9 13 km NNW of Gillette, Wyoming
- 3.4 9 km E of Wright, Wyoming
- 2.5 4 km S of Wright, Wyoming
- 3.0 20 km SSE of Antelope Valley-Crestview, Wyoming
- 3.3 21 km N of Wright, Wyoming
- 3.4 12 km ESE of Wright, Wyoming
- 3.0 12 km SSE of Sleepy Hollow, Wyoming
- 3.5 22 km E of Wright, Wyoming
- 3.2 20 km SE of Wright, Wyoming
- 2.9 14 km ENE of Wright, Wyoming
- 3.4 16 km ENE 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
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.