Alaska earthquakes

M4.6 earthquake 238 km SE of Attu Station, Alaska

A magnitude 4.6 earthquake struck 238 km SE of Attu Station, Alaska on Sat, Jan 31, 1981, 6:25 PM GMT+12 (06:25 UTC), 25 km (16 mi) below the surface.

A larger quake followed: M5.6 297 km SE of Attu Station, Alaska. This one was a foreshock.

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The earthquake

Magnitude
4.6 (mb), light
Local time
UTC
1981-01-31 06:25:55 UTC
Depth
25.0 km (15.5 mi), shallow
Epicenter
51.431° N, 175.801° 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.

Stations used
32

Nearby

Within 100 km, magnitude 1.6 and up: 9 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 5.6297 km SE of Attu Station, Alaska · 16669 days ago · 23 km deep · 69 km away
  2. 4.9292 km SE of Attu Station, Alaska · 16669 days ago · 36 km deep · 63 km away
  3. 5.4Rat Islands, Aleutian Islands, Alaska · 16666 days ago · 33 km deep · 58 km away
  4. 4.4280 km SE of Attu Station, Alaska · 16666 days ago · 33 km deep · 53 km away
  5. 5.1245 km ESE of Attu Station, Alaska · 16643 days ago · 49 km deep · 58 km away
  6. 4.4251 km ESE of Attu Station, Alaska · 16616 days ago · 59 km deep · 54 km away
  7. 5.1218 km SE of Attu Station, Alaska · 16613 days ago · 33 km deep · 25 km away
  8. 4.6210 km SE of Attu Station, Alaska · 16613 days ago · 39 km deep · 33 km away
  9. 4.8212 km SE of Attu Station, Alaska · 16613 days ago · 29 km deep · 32 km away

Before

  1. 4.1239 km SE of Attu Station, Alaska · 16671 days ago · 33 km deep · 28 km away
  2. 4.6260 km SE of Attu Station, Alaska · 16671 days ago · 26 km deep · 27 km away
  3. 4.7262 km SE of Attu Station, Alaska · 16671 days ago · 33 km deep · 25 km away
  4. 5.6243 km SE of Attu Station, Alaska · 16671 days ago · 19 km deep · 25 km away
  5. 4.6Rat Islands, Aleutian Islands, Alaska · 16671 days ago · 33 km deep · 39 km away
  6. 4.2246 km SE of Attu Station, Alaska · 16671 days ago · 33 km deep · 12 km away
  7. 5.4231 km SE of Attu Station, Alaska · 16671 days ago · 21 km deep · 30 km away
  8. 7.0243 km ESE of Attu Station, Alaska · 16671 days ago · 33 km deep · 48 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0001bze. Read Tue, Sep 22, 2026, 10:17 AM UTC.