M3.1 earthquake 29 km NW of Farson, Wyoming
A magnitude 3.1 earthquake struck 29 km NW of Farson, Wyoming on Thu, Dec 4, 1986, 7:40 AM MST (14:40 UTC), 17 km (11 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.1 (md), minor
- Local time
- UTC
- 1986-12-04 14:40:09 UTC
- Depth
- 17.2 km (10.7 mi), shallow
- Epicenter
- 42.278° N, 109.720° W
- Region
- Wyoming
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 3.5 km horizontally, 6.5 km in depth
- Depth from
- From location
- Station coverage gap
- 201°, poorly surrounded by stations
- Stations used
- 13
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 0 in the 60 days after this one and 0 in the 30 days before it.
None recorded.
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uu50030935. Read Tue, Sep 22, 2026, 12:09 PM UTC.