Alaska earthquakes

M5.7 earthquake 274 km WSW of Adak, Alaska

A magnitude 5.7 earthquake struck 274 km WSW of Adak, Alaska on Sat, Mar 7, 1987, 1:48 AM GMT+12 (13:48 UTC), 54 km (34 mi) below the surface.

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The earthquake

Magnitude
5.7 (mw), moderate
Local time
UTC
1987-03-06 13:48:41 UTC
Depth
54.4 km (33.8 mi), shallow
Epicenter
51.135° N, 179.587° 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
CONSTRAINED_BY_DEPTH_PHASES

Nearby

Within 100 km, magnitude 2.5 and up: 7 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 4.5299 km WSW of Adak, Alaska · 14445 days ago · 33 km deep · 25 km away
  2. 4.4279 km WSW of Adak, Alaska · 14444 days ago · 33 km deep · 21 km away
  3. 4.8280 km WSW of Adak, Alaska · 14444 days ago · 33 km deep · 17 km away
  4. 5.1278 km WSW of Adak, Alaska · 14444 days ago · 33 km deep · 5 km away
  5. 4.6Rat Islands, Aleutian Islands, Alaska · 14438 days ago · 33 km deep · 35 km away
  6. 4.7242 km WSW of Adak, Alaska · 14412 days ago · 33 km deep · 36 km away
  7. 4.3190 km WSW of Adak, Alaska · 14406 days ago · 33 km deep · 99 km away

Before

  1. 5.4193 km WSW of Adak, Alaska · 14461 days ago · 33 km deep · 81 km away
  2. 6.2194 km WSW of Adak, Alaska · 14461 days ago · 33 km deep · 81 km away
  3. 4.8Rat Islands, Aleutian Islands, Alaska · 14468 days ago · 33 km deep · 54 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp000331e (also filed as gcmtb030687g, gcmt19870306134841, iscgem471380). Read Tue, Sep 22, 2026, 2:13 AM UTC.