Alaska earthquakes

M6.2 earthquake 194 km WSW of Adak, Alaska

A magnitude 6.2 earthquake struck 194 km WSW of Adak, Alaska on Tue, Feb 17, 1987, 2:00 PM HAST (00:00 UTC), 33 km (21 mi) below the surface.

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The earthquake

Magnitude
6.2 (mw), strong
Local time
UTC
1987-02-18 00:00:52 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.298° N, 179.279° 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.

How well it is located

Reviewed by a seismologist.

Depth from
OPERATOR_ASSIGNED

Nearby

Within 100 km, magnitude 3.2 and up: 9 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 5.4193 km WSW of Adak, Alaska · 14470 days ago · 33 km deep · 5 km away
  2. 5.7274 km WSW of Adak, Alaska · 14453 days ago · 54 km deep · 81 km away
  3. 4.4279 km WSW of Adak, Alaska · 14453 days ago · 33 km deep · 89 km away
  4. 4.8280 km WSW of Adak, Alaska · 14453 days ago · 33 km deep · 87 km away
  5. 5.1278 km WSW of Adak, Alaska · 14453 days ago · 33 km deep · 84 km away
  6. 4.8130 km WSW of Adak, Alaska · 14448 days ago · 33 km deep · 65 km away
  7. 5.1130 km WSW of Adak, Alaska · 14432 days ago · 33 km deep · 70 km away
  8. 4.7242 km WSW of Adak, Alaska · 14420 days ago · 33 km deep · 54 km away
  9. 4.3190 km WSW of Adak, Alaska · 14414 days ago · 33 km deep · 37 km away

Before

  1. 4.3Andreanof Islands, Aleutian Islands, Alaska · 14479 days ago · 102 km deep · 52 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00032k6 (also filed as gcmtb021887a, ushis4013, gcmt19870218000052, iscgem474818). Read Wed, Sep 30, 2026, 5:23 PM UTC.