Alaska earthquakes

M4.7 earthquake 80 km S of Adak, Alaska

A magnitude 4.7 earthquake struck 80 km S of Adak, Alaska on Sun, Aug 3, 1986, 12:36 PM HADT (21:36 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.4 45 km ESE of Adak, Alaska. This one was a foreshock.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
4.7 (mb), light
Local time
UTC
1986-08-03 21:36:21 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.147° N, 176.688° 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 1.7 and up: 6 in the 60 days after this one and 20 in the 30 days before it.

After

  1. 4.237 km E of Adak, Alaska · 14652 days ago · 33 km deep · 87 km away
  2. 4.364 km ESE of Adak, Alaska · 14649 days ago · 33 km deep · 89 km away
  3. 4.946 km SW of Adak, Alaska · 14625 days ago · 33 km deep · 54 km away
  4. 4.594 km SSW of Adak, Alaska · 14622 days ago · 33 km deep · 22 km away
  5. 4.1108 km SE of Adak, Alaska · 14612 days ago · 33 km deep · 92 km away
  6. 5.445 km ESE of Adak, Alaska · 14608 days ago · 33 km deep · 84 km away

Before

  1. 4.987 km S of Adak, Alaska · 14667 days ago · 33 km deep · 6 km away
  2. 4.784 km S of Adak, Alaska · 14667 days ago · 33 km deep · 4 km away
  3. 5.979 km S of Adak, Alaska · 14667 days ago · 33 km deep · 8 km away
  4. 5.076 km SE of Adak, Alaska · 14669 days ago · 33 km deep · 52 km away
  5. 4.354 km SSE of Adak, Alaska · 14669 days ago · 33 km deep · 44 km away
  6. 4.986 km SSE of Adak, Alaska · 14669 days ago · 33 km deep · 38 km away
  7. 4.883 km SSE of Adak, Alaska · 14669 days ago · 33 km deep · 34 km away
  8. 4.844 km E of Adak, Alaska · 14674 days ago · 33 km deep · 94 km away
  9. 4.497 km SSE of Adak, Alaska · 14675 days ago · 33 km deep · 40 km away
  10. 4.793 km SSE of Adak, Alaska · 14676 days ago · 33 km deep · 54 km away
  11. 4.669 km ESE of Adak, Alaska · 14676 days ago · 33 km deep · 99 km away
  12. 5.683 km SSE of Adak, Alaska · 14676 days ago · 33 km deep · 46 km away
  13. 5.876 km SSE of Adak, Alaska · 14676 days ago · 33 km deep · 38 km away
  14. 4.952 km S of Adak, Alaska · 14678 days ago · 33 km deep · 28 km away
  15. 4.983 km SSE of Adak, Alaska · 14679 days ago · 33 km deep · 38 km away
  16. 5.257 km SSE of Adak, Alaska · 14679 days ago · 33 km deep · 47 km away
  17. 4.879 km SE of Adak, Alaska · 14680 days ago · 33 km deep · 76 km away
  18. 5.026 km SW of Adak, Alaska · 14692 days ago · 57 km deep · 61 km away
  19. 5.527 km E of Adak, Alaska · 14692 days ago · 50 km deep · 90 km away
  20. 4.569 km SE of Adak, Alaska · 14694 days ago · 33 km deep · 53 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002wuv. Read Tue, Sep 29, 2026, 6:54 PM UTC.