Alaska earthquakes

M4.6 earthquake 114 km SE of Adak, Alaska

A magnitude 4.6 earthquake struck 114 km SE of Adak, Alaska on Fri, Dec 4, 1987, 3:44 AM HAST (13:44 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.0 135 km SSW of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude
4.6 (mb), light
Local time
UTC
1987-12-04 13:44:56 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.214° N, 175.373° 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 1.6 and up: 19 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 4.679 km E of Adak, Alaska · 14166 days ago · 33 km deep · 76 km away
  2. 5.0135 km SSW of Atka, Alaska · 14162 days ago · 33 km deep · 25 km away
  3. 4.979 km SE of Adak, Alaska · 14161 days ago · 33 km deep · 39 km away
  4. 4.397 km SW of Atka, Alaska · 14151 days ago · 33 km deep · 39 km away
  5. 5.595 km SSW of Atka, Alaska · 14132 days ago · 33 km deep · 54 km away
  6. 5.5103 km SSW of Atka, Alaska · 14132 days ago · 33 km deep · 51 km away
  7. 5.2103 km SSW of Atka, Alaska · 14132 days ago · 33 km deep · 48 km away
  8. 5.1100 km SSW of Atka, Alaska · 14132 days ago · 33 km deep · 51 km away
  9. 5.383 km SSW of Atka, Alaska · 14132 days ago · 33 km deep · 57 km away
  10. 5.193 km SSW of Atka, Alaska · 14132 days ago · 33 km deep · 52 km away
  11. 5.0108 km S of Atka, Alaska · 14123 days ago · 33 km deep · 77 km away
  12. 4.781 km S of Atka, Alaska · 14123 days ago · 33 km deep · 86 km away
  13. 4.886 km S of Atka, Alaska · 14123 days ago · 33 km deep · 87 km away
  14. 5.085 km S of Atka, Alaska · 14122 days ago · 33 km deep · 81 km away
  15. 4.699 km S of Atka, Alaska · 14122 days ago · 33 km deep · 76 km away
  16. 5.085 km S of Atka, Alaska · 14122 days ago · 33 km deep · 79 km away
  17. 5.088 km S of Atka, Alaska · 14122 days ago · 48 km deep · 80 km away
  18. 4.670 km S of Atka, Alaska · 14122 days ago · 33 km deep · 89 km away
  19. 4.892 km S of Atka, Alaska · 14122 days ago · 33 km deep · 79 km away

Before

  1. 4.7111 km S of Atka, Alaska · 14188 days ago · 33 km deep · 74 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0003ay4. Read Tue, Sep 22, 2026, 6:31 AM UTC.