Earthquake · reviewed by a seismologist
M 2.9ml
Earthquake near Green River, WY
No earthquake was likely felt in Green River in the 24 hours to 1:24 am MST (08:24 UTC). The last one was M 3.1, 35 km (22 mi) W, at 5:37 pm MST on 6 November 2026, estimated intensity II (weak) in town. Every earthquake near Green River
This page: a magnitude 2.9 earthquake was recorded 40 km (25 mi) west-northwest of Green River, WY, at 3:12 am MDT on 21 March 2026 (09:12 UTC), less than 1 km deep.
USGS: 15 km NNE of Granger, Wyoming
- When
- 3:12 am MDT on 21 March 2026 ()
- Where
- 40 km (25 mi) west-northwest of Green River, WY · earthquakes near Green River
- Magnitude
- M 2.9 (ml)
- Depth
- -3.4 km below the surface
- Felt
- no reports yet
- Nearest
- Uinta County, 74 km SW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 162 days ago
Earthquake alerts for Green River, WY
Get a notification in this browser when USGS records an earthquake near Green River, WY. No account or email needed.
Alerts are on for .
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 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 31 km (19 mi) from the epicentre. In Green River, 40 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.
How big was it?
This earthquake released about 630 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 24,000× the energy of this one
- Magna, Utah 2020 M 5.7 17,000× the energy of this one
- Around the size people start to feel M 3.0 1.5× the energy of this one
- This earthquake M 2.9 about 630 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:
- 5.2 8 km SE of Little America, Wyoming · 25 km SSE 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 41.7125, -109.8732. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Uinta County, WY | 74 km (46 mi) | SW | earthquakes near Uinta County |
| Sweetwater County, WY | 83 km (52 mi) | E | earthquakes near Sweetwater County |
| Lincoln County, WY | 88 km (55 mi) | NW | earthquakes near Lincoln County |
| Daggett County, UT | 96 km (60 mi) | SSE | earthquakes near Daggett County |
| Rich County, UT | 114 km (71 mi) | W | earthquakes near Rich County |
| Sublette County, WY | 117 km (73 mi) | N | earthquakes near Sublette County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
23 earthquakes have been recorded within 50 km since this one.
- 3.0 3 km NNW of Little America, Wyoming
- 3.1 3 km NW of Little America, Wyoming
- 3.0 2 km NNW of Little America, Wyoming
- 3.3 3 km NW of Little America, Wyoming
- 2.8 10 km N of Little America, Wyoming
- 2.8 2 km NNW of Little America, Wyoming
- 3.1 3 km NW of Little America, Wyoming
- 3.4 3 km NNW of Little America, Wyoming
- 3.8 22 km NE of Granger, Wyoming
- 3.0 2 km NNW of Little America, Wyoming
- 3.0 3 km NW of Little America, Wyoming
- 3.1 2 km NNW of Little America, Wyoming
- 3.3 2 km NW of Little America, Wyoming
- 3.1 2 km NNW of Little America, Wyoming
- 3.3 2 km NW of Little America, 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.