M3.9 earthquake 61 km SSW of Adak, Alaska
A magnitude 3.9 earthquake struck 61 km SSW of Adak, Alaska on Thu, Oct 22, 1981, 10:22 AM GMT-10 (20:22 UTC), 41 km (25 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.9 (mb), minor
- Local time
- UTC
- 1981-10-22 20:22:17 UTC
- Depth
- 40.9 km (25.4 mi), shallow
- Epicenter
- 51.330° N, 176.817° 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
- FROM_LOCATION
Nearby
Within 100 km, magnitude 1.5 and up: 0 in the 60 days after this one and 2 in the 30 days before it.
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001gma. Read Tue, Sep 22, 2026, 7:05 AM UTC.