Alaska earthquakes

M5.4 earthquake 282 km WSW of Adak, Alaska

A magnitude 5.4 earthquake struck 282 km WSW of Adak, Alaska on Tue, Oct 30, 1984, 11:04 AM GMT+12 (23:04 UTC), 39 km (24 mi) below the surface.

A larger quake followed: M5.9 Rat Islands, Aleutian Islands, Alaska. This one was a foreshock.

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The earthquake

Magnitude
5.4 (mw), moderate
Local time
UTC
1984-10-29 23:04:43 UTC
Depth
38.7 km (24.0 mi), shallow
Epicenter
51.125° N, 179.484° 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.

Nearby

Within 100 km, magnitude 2.4 and up: 6 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 5.3275 km WSW of Adak, Alaska · 15301 days ago · 57 km deep · 7 km away
  2. 5.9Rat Islands, Aleutian Islands, Alaska · 15282 days ago · 39 km deep · 28 km away
  3. 4.8286 km WSW of Adak, Alaska · 15279 days ago · 33 km deep · 5 km away
  4. 4.5Rat Islands, Aleutian Islands, Alaska · 15279 days ago · 33 km deep · 28 km away
  5. 4.6Rat Islands, Aleutian Islands, Alaska · 15279 days ago · 33 km deep · 42 km away
  6. 4.5281 km WSW of Adak, Alaska · 15279 days ago · 33 km deep · 21 km away

Before

  1. 4.8203 km WSW of Adak, Alaska · 15322 days ago · 33 km deep · 87 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00028mp (also filed as gcmtb102984a, gcmt19841029230443, iscgem542378). Read Tue, Sep 22, 2026, 10:54 AM UTC.