M4.6 earthquake 28 km SSW of Adak, Alaska
A magnitude 4.6 earthquake struck 28 km SSW of Adak, Alaska on Tue, Apr 21, 1981, 10:30 PM GMT-11 (09:30 UTC), 62 km (38 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 1981-04-22 09:30:46 UTC
- Depth
- 61.6 km (38.3 mi), shallow
- Epicenter
- 51.639° N, 176.803° 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.
Nearby
Within 100 km, magnitude 1.6 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001d9v. Read Tue, Sep 22, 2026, 2:47 PM UTC.