M4.5 earthquake 60 km SW of Unalaska, Alaska
A magnitude 4.5 earthquake struck 60 km SW of Unalaska, Alaska on Wed, Sep 3, 1986, 9:21 AM AKDT (17:21 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.6 57 km SW of Unalaska, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (mb), light
- Local time
- UTC
- 1986-09-03 17:21:51 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 53.468° N, 167.138° W
- Region
- Alaska
- 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 3 in the 30 days before it.
After
- 4.657 km SW of Unalaska, Alaska · 14613 days ago · 33 km deep · 14 km away
- 4.894 km S of Unalaska, Alaska · 14583 days ago · 33 km deep · 53 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002xt3. Read Wed, Sep 23, 2026, 1:01 PM UTC.