Earthquake · reviewed by a seismologist
M 1.8md
Earthquake near Green River, WY
No earthquake was likely felt in Green River in the 24 hours to 12:44 pm MST (19:44 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 1.8 earthquake was recorded 45 km (28 mi) west of Green River, WY, at 12:30 pm MST on 23 December 2022 (19:30 UTC), 29 km deep.
USGS: 2 km WNW of Granger, Wyoming
- When
- 12:30 pm MST on 23 December 2022 ()
- Where
- 45 km (28 mi) west of Green River, WY · earthquakes near Green River
- Magnitude
- M 1.8 (md)
- Depth
- 29 km below the surface
- Felt
- no reports yet
- Nearest
- Uinta County, 58 km SW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1416 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 minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth it was probably too small to be felt, even directly above it. In Green River, 45 km away, the estimate is intensity I (not felt). 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 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 970,000× the energy of this one
- Magna, Utah 2020 M 5.7 680,000× the energy of this one
- Around the size people start to feel M 3.0 61× the energy of this one
- This earthquake M 1.8 about 16 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 · 21 km ESE 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 41.6005, -109.9977. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Uinta County, WY | 58 km (36 mi) | SW | earthquakes near Uinta County |
| Daggett County, UT | 89 km (55 mi) | SSE | earthquakes near Daggett County |
| Lincoln County, WY | 90 km (56 mi) | NW | earthquakes near Lincoln County |
| Sweetwater County, WY | 93 km (58 mi) | E | earthquakes near Sweetwater County |
| Rich County, UT | 103 km (64 mi) | W | earthquakes near Rich County |
| Summit County, UT | 115 km (71 mi) | SW | earthquakes near Summit County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
52 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.