mining explosion · reviewed by a seismologist
M 3.0ml
21 km NNE of Maeser, Utah
- When
- Magnitude
- M 3.0 (ml)
- Depth
- 0.0 km below the surface
- Felt
- no reports yet
- Nearest
- Daggett County, 29 km N
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 95 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 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.
- Northridge, California 1994 M 6.7 350,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
- Magna, Utah 2020 M 5.7 11,000× the energy of this one
- 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 40.6362, -109.4523. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Daggett County, UT | 29 km (18 mi) | S of here | earthquakes near Daggett County |
| Uintah County, UT | 57 km (35 mi) | N of here | earthquakes near Uintah County |
| Duchesne County, UT | 91 km (57 mi) | ENE of here | earthquakes near Duchesne County |
| Moffat County, CO | 104 km (65 mi) | W of here | earthquakes near Moffat County |
| Uinta County, WY | 118 km (73 mi) | SE of here | earthquakes near Uinta County |
| Sweetwater County, WY | 124 km (77 mi) | SSW of here | earthquakes near Sweetwater County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
4 earthquakes have been recorded within 50 km since this one.
- 3.1 24 km NNE of Maeser, Utah
- 3.1 18 km NNE of Maeser, Utah
- 3.3 16 km NNE of Maeser, Utah
- 1.9 12 km SSW of Jensen, Utah
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.
For this area
The largest earthquake within 50 km in our catalogue was M 4.1 on 2025-09-10 — it released about 50 times the energy of this one.
From the QuakeIndex catalogue, built from the USGS FDSN event service.
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.