M4.1 earthquake 37 km WSW of Unalaska, Alaska
A magnitude 4.1 earthquake struck 37 km WSW of Unalaska, Alaska on Fri, Jun 12, 1987, 10:52 AM AKDT (18:52 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.5 35 km WSW 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
- 4.1 (mb), light
- Local time
- UTC
- 1987-06-12 18:52:23 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 53.755° N, 167.059° 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: 3 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.535 km WSW of Unalaska, Alaska · 14346 days ago · 33 km deep · 2 km away
- 4.739 km W of Dutch Harbor, Alaska · 14323 days ago · 33 km deep · 10 km away
- 4.644 km W of Dutch Harbor, Alaska · 14290 days ago · 33 km deep · 13 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00035rd. Read Tue, Sep 22, 2026, 6:05 AM UTC.