M3.3 earthquake 8 km NNW of Alpine Northwest, Wyoming
A magnitude 3.3 earthquake struck 8 km NNW of Alpine Northwest, Wyoming on Mon, Jul 7, 1986, 5:53 AM MDT (11:53 UTC), 5 km (3 mi) below the surface.
A larger quake followed: M3.4 11 km NE of Bennington, Idaho. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.3 (ml), minor
- Local time
- UTC
- 1986-07-07 11:53:17 UTC
- Depth
- 5.0 km (3.1 mi), shallow
- Epicenter
- 43.248° N, 111.090° 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 1 in the 30 days before it.
After
- 3.411 km NE of Bennington, Idaho · 14664 days ago · 6 km deep · 89 km away
- 2.013 km WSW of Georgetown, Idaho · 14660 days ago · 0 km deep · 98 km away
Before
Earthquakes todayWyoming earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002vsf. Read Tue, Sep 22, 2026, 10:55 AM UTC.