Alaska earthquakes

M4.7 earthquake 84 km S of Adak, Alaska

A magnitude 4.7 earthquake struck 84 km S of Adak, Alaska on Sun, Aug 3, 1986, 4:44 AM HADT (13:44 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 13:44:55 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.112° N, 176.706° 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: 8 in the 60 days after this one and 17 in the 30 days before it.

After

  1. 4.987 km S of Adak, Alaska · 14667 days ago · 33 km deep · 2 km away
  2. 4.780 km S of Adak, Alaska · 14667 days ago · 33 km deep · 4 km away
  3. 4.237 km E of Adak, Alaska · 14652 days ago · 33 km deep · 91 km away
  4. 4.364 km ESE of Adak, Alaska · 14649 days ago · 33 km deep · 93 km away
  5. 4.946 km SW of Adak, Alaska · 14625 days ago · 33 km deep · 56 km away
  6. 4.594 km SSW of Adak, Alaska · 14622 days ago · 33 km deep · 19 km away
  7. 4.1108 km SE of Adak, Alaska · 14612 days ago · 33 km deep · 94 km away
  8. 5.445 km ESE of Adak, Alaska · 14608 days ago · 33 km deep · 88 km away

Before

  1. 5.979 km S of Adak, Alaska · 14667 days ago · 33 km deep · 9 km away
  2. 5.076 km SE of Adak, Alaska · 14669 days ago · 33 km deep · 55 km away
  3. 4.354 km SSE of Adak, Alaska · 14669 days ago · 33 km deep · 48 km away
  4. 4.986 km SSE of Adak, Alaska · 14669 days ago · 33 km deep · 40 km away
  5. 4.883 km SSE of Adak, Alaska · 14669 days ago · 33 km deep · 36 km away
  6. 4.844 km E of Adak, Alaska · 14674 days ago · 33 km deep · 98 km away
  7. 4.497 km SSE of Adak, Alaska · 14675 days ago · 33 km deep · 41 km away
  8. 4.793 km SSE of Adak, Alaska · 14676 days ago · 33 km deep · 55 km away
  9. 5.683 km SSE of Adak, Alaska · 14677 days ago · 33 km deep · 48 km away
  10. 5.876 km SSE of Adak, Alaska · 14677 days ago · 33 km deep · 40 km away
  11. 4.952 km S of Adak, Alaska · 14678 days ago · 33 km deep · 32 km away
  12. 4.983 km SSE of Adak, Alaska · 14679 days ago · 33 km deep · 40 km away
  13. 5.257 km SSE of Adak, Alaska · 14679 days ago · 33 km deep · 51 km away
  14. 4.879 km SE of Adak, Alaska · 14680 days ago · 33 km deep · 78 km away
  15. 5.026 km SW of Adak, Alaska · 14692 days ago · 57 km deep · 64 km away
  16. 5.527 km E of Adak, Alaska · 14692 days ago · 50 km deep · 94 km away
  17. 4.569 km SE of Adak, Alaska · 14695 days ago · 33 km deep · 56 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002wuk. Read Tue, Sep 29, 2026, 10:11 PM UTC.