M4.6 earthquake 204 km SE of Attu Station, Alaska
A magnitude 4.6 earthquake struck 204 km SE of Attu Station, Alaska on Sun, Apr 5, 1981, 11:17 AM GMT+12 (23:17 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.7 203 km SE of Attu Station, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 1981-04-04 23:17:31 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.500° N, 175.212° E
- 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
Nearby
Within 100 km, magnitude 1.6 and up: 2 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.4242 km SE of Attu Station, Alaska · 16564 days ago · 52 km deep · 49 km away
- 4.7203 km SE of Attu Station, Alaska · 16549 days ago · 33 km deep · 47 km away
Before
- 4.8212 km SE of Attu Station, Alaska · 16613 days ago · 29 km deep · 9 km away
- 4.6210 km SE of Attu Station, Alaska · 16613 days ago · 39 km deep · 9 km away
- 5.1218 km SE of Attu Station, Alaska · 16613 days ago · 33 km deep · 17 km away
- 4.4251 km ESE of Attu Station, Alaska · 16616 days ago · 59 km deep · 87 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001d0p. Read Tue, Sep 22, 2026, 9:13 AM UTC.