Alaska earthquakes

M4.3 earthquake 97 km ESE of Adak, Alaska

A magnitude 4.3 earthquake struck 97 km ESE of Adak, Alaska on Tue, May 26, 1987, 5:56 AM HADT (14:56 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.0 36 km SE of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
4.3 (mb), light
Local time
UTC
1987-05-26 14:56:57 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.554° N, 175.325° 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 1.5 and up: 22 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 3.697 km SSE of Adak, Alaska · 14363 days ago · 33 km deep · 75 km away
  2. 5.036 km SE of Adak, Alaska · 14358 days ago · 58 km deep · 64 km away
  3. 4.879 km S of Atka, Alaska · 14353 days ago · 33 km deep · 63 km away
  4. 5.095 km SSW of Atka, Alaska · 14353 days ago · 33 km deep · 61 km away
  5. 4.975 km SW of Atka, Alaska · 14351 days ago · 33 km deep · 34 km away
  6. 4.386 km SSE of Adak, Alaska · 14344 days ago · 33 km deep · 68 km away
  7. 4.986 km S of Adak, Alaska · 14336 days ago · 33 km deep · 100 km away
  8. 4.588 km S of Adak, Alaska · 14329 days ago · 33 km deep · 93 km away
  9. 4.784 km S of Adak, Alaska · 14329 days ago · 33 km deep · 92 km away
  10. 5.097 km S of Adak, Alaska · 14329 days ago · 33 km deep · 98 km away
  11. 4.583 km S of Adak, Alaska · 14329 days ago · 33 km deep · 96 km away
  12. 5.388 km SSW of Atka, Alaska · 14325 days ago · 33 km deep · 45 km away
  13. 5.685 km SSW of Atka, Alaska · 14324 days ago · 33 km deep · 47 km away
  14. 5.984 km SSW of Atka, Alaska · 14324 days ago · 33 km deep · 42 km away
  15. 5.154 km SSW of Atka, Alaska · 14324 days ago · 33 km deep · 56 km away
  16. 4.3159 km SSW of Atka, Alaska · 14323 days ago · 33 km deep · 88 km away
  17. 4.265 km SSW of Atka, Alaska · 14323 days ago · 33 km deep · 51 km away
  18. 5.291 km SSW of Atka, Alaska · 14323 days ago · 33 km deep · 55 km away
  19. 5.083 km SSW of Atka, Alaska · 14323 days ago · 33 km deep · 57 km away
  20. 4.644 km SW of Atka, Alaska · 14323 days ago · 33 km deep · 61 km away
  21. 5.183 km SSW of Atka, Alaska · 14323 days ago · 33 km deep · 42 km away
  22. 4.1110 km SSE of Adak, Alaska · 14307 days ago · 33 km deep · 78 km away

Before

  1. 4.581 km SSE of Adak, Alaska · 14367 days ago · 33 km deep · 64 km away
  2. 4.774 km SSE of Adak, Alaska · 14367 days ago · 33 km deep · 59 km away
  3. 5.061 km SE of Adak, Alaska · 14374 days ago · 33 km deep · 42 km away
  4. 4.760 km SE of Adak, Alaska · 14376 days ago · 33 km deep · 57 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0003599. Read Tue, Sep 22, 2026, 12:15 PM UTC.