Alaska earthquakes

M4.8 earthquake 83 km SSE of Adak, Alaska

A magnitude 4.8 earthquake struck 83 km SSE of Adak, Alaska on Fri, Aug 1, 1986, 10:46 AM HADT (19:46 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M4.9 86 km SSE 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
4.8 (mb), light
Local time
UTC
1986-08-01 19:46:34 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.171° N, 176.198° 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 1.8 and up: 16 in the 60 days after this one and 20 in the 30 days before it.

After

  1. 4.986 km SSE of Adak, Alaska · 14662 days ago · 33 km deep · 4 km away
  2. 4.354 km SSE of Adak, Alaska · 14662 days ago · 33 km deep · 31 km away
  3. 5.076 km SE of Adak, Alaska · 14662 days ago · 33 km deep · 21 km away
  4. 5.979 km S of Adak, Alaska · 14660 days ago · 33 km deep · 42 km away
  5. 4.784 km S of Adak, Alaska · 14660 days ago · 33 km deep · 36 km away
  6. 4.987 km S of Adak, Alaska · 14660 days ago · 33 km deep · 37 km away
  7. 4.780 km S of Adak, Alaska · 14660 days ago · 33 km deep · 34 km away
  8. 4.888 km SW of Atka, Alaska · 14649 days ago · 33 km deep · 90 km away
  9. 4.237 km E of Adak, Alaska · 14645 days ago · 33 km deep · 75 km away
  10. 4.364 km ESE of Adak, Alaska · 14642 days ago · 33 km deep · 66 km away
  11. 4.488 km SW of Atka, Alaska · 14631 days ago · 33 km deep · 90 km away
  12. 4.946 km SW of Adak, Alaska · 14618 days ago · 33 km deep · 75 km away
  13. 4.594 km SSW of Adak, Alaska · 14615 days ago · 33 km deep · 55 km away
  14. 4.1108 km SE of Adak, Alaska · 14605 days ago · 33 km deep · 58 km away
  15. 4.199 km SW of Atka, Alaska · 14604 days ago · 33 km deep · 82 km away
  16. 5.0110 km SSW of Atka, Alaska · 14603 days ago · 33 km deep · 87 km away

Before

  1. 4.785 km SW of Atka, Alaska · 14666 days ago · 33 km deep · 94 km away
  2. 5.588 km WSW of Atka, Alaska · 14666 days ago · 33 km deep · 92 km away
  3. 4.844 km E of Adak, Alaska · 14667 days ago · 33 km deep · 79 km away
  4. 4.497 km SSE of Adak, Alaska · 14668 days ago · 33 km deep · 14 km away
  5. 4.793 km SSE of Adak, Alaska · 14669 days ago · 33 km deep · 19 km away
  6. 4.669 km ESE of Adak, Alaska · 14669 days ago · 33 km deep · 75 km away
  7. 5.683 km SSE of Adak, Alaska · 14669 days ago · 33 km deep · 13 km away
  8. 5.876 km SSE of Adak, Alaska · 14669 days ago · 33 km deep · 9 km away
  9. 4.993 km SW of Atka, Alaska · 14670 days ago · 33 km deep · 86 km away
  10. 4.952 km S of Adak, Alaska · 14671 days ago · 33 km deep · 43 km away
  11. 4.983 km SSE of Adak, Alaska · 14672 days ago · 33 km deep · 4 km away
  12. 5.257 km SSE of Adak, Alaska · 14672 days ago · 33 km deep · 30 km away
  13. 4.879 km SE of Adak, Alaska · 14673 days ago · 33 km deep · 45 km away
  14. 4.0101 km SW of Atka, Alaska · 14675 days ago · 33 km deep · 81 km away
  15. 5.026 km SW of Adak, Alaska · 14685 days ago · 57 km deep · 73 km away
  16. 5.527 km E of Adak, Alaska · 14685 days ago · 50 km deep · 82 km away
  17. 4.5Andreanof Islands, Aleutian Islands, Alaska · 14686 days ago · 33 km deep · 77 km away
  18. 4.569 km SE of Adak, Alaska · 14687 days ago · 33 km deep · 26 km away
  19. 4.975 km ESE of Adak, Alaska · 14691 days ago · 33 km deep · 50 km away
  20. 5.063 km SE of Adak, Alaska · 14691 days ago · 33 km deep · 41 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002wsz. Read Tue, Sep 22, 2026, 8:22 PM UTC.