M3.6 earthquake 6 km ESE of Alpine, Wyoming
A magnitude 3.6 earthquake struck 6 km ESE of Alpine, Wyoming on Fri, Sep 6, 1985, 11:18 AM MDT (17:18 UTC), 5 km (3 mi) below the surface.
A larger quake followed: M4.6 14 km SSE of Hoback, Wyoming. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.6 (ml), minor
- Local time
- UTC
- 1985-09-06 17:18:57 UTC
- Depth
- 5.0 km (3.1 mi), shallow
- Epicenter
- 43.151° N, 110.935° 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.
- Depth from
- OPERATOR_ASSIGNED
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.614 km SSE of Hoback, Wyoming · 14990 days ago · 5 km deep · 17 km away
- 3.59 km SE of Alpine, Wyoming · 14977 days ago · 8 km deep · 4 km away
Before
- 4.210 km ESE of Alpine Northeast, Wyoming · 14997 days ago · 5 km deep · 4 km away
- 3.212 km E of Alpine Northeast, Wyoming · 15005 days ago · 5 km deep · 7 km away
- 3.412 km ESE of Alpine, Wyoming · 15005 days ago · 5 km deep · 6 km away
- 4.317 km ESE of Alpine, Wyoming · 15006 days ago · 5 km deep · 10 km away
- 4.812 km S of Hoback, Wyoming · 15006 days ago · 5 km deep · 13 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002jfz. Read Tue, Sep 22, 2026, 4:24 AM UTC.