M4.7 earthquake 63 km SE of Unalaska, Alaska
A magnitude 4.7 earthquake struck 63 km SE of Unalaska, Alaska on Fri, May 17, 1985, 4:34 AM AKDT (12:34 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.1 Fox Islands, Aleutian Islands, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb), light
- Local time
- UTC
- 1985-05-17 12:34:06 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 53.415° N, 165.960° 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 1.7 and up: 3 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.1Fox Islands, Aleutian Islands, Alaska · 15098 days ago · 71 km deep · 76 km away
- 4.640 km SSW of Unalaska, Alaska · 15096 days ago · 100 km deep · 48 km away
- 4.792 km SE of Akutan, Alaska · 15047 days ago · 33 km deep · 67 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002ewv. Read Tue, Sep 22, 2026, 12:57 AM UTC.