Alaska earthquakes

M4.9 earthquake 86 km SSE of Adak, Alaska

A magnitude 4.9 earthquake struck 86 km SSE of Adak, Alaska on Fri, Aug 1, 1986, 11:24 AM HADT (20:24 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.0 76 km SE 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
4.9 (ms), light
Local time
UTC
1986-08-01 20:24:59 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.163° N, 176.138° 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 1.9 and up: 17 in the 60 days after this one and 21 in the 30 days before it.

After

  1. 4.354 km SSE of Adak, Alaska · 14662 days ago · 33 km deep · 32 km away
  2. 5.076 km SE of Adak, Alaska · 14662 days ago · 33 km deep · 20 km away
  3. 4.795 km SSW of Atka, Alaska · 14661 days ago · 33 km deep · 100 km away
  4. 5.979 km S of Adak, Alaska · 14660 days ago · 33 km deep · 46 km away
  5. 4.784 km S of Adak, Alaska · 14660 days ago · 33 km deep · 40 km away
  6. 4.987 km S of Adak, Alaska · 14660 days ago · 33 km deep · 40 km away
  7. 4.780 km S of Adak, Alaska · 14660 days ago · 33 km deep · 38 km away
  8. 4.3Andreanof Islands, Aleutian Islands, Alaska · 14654 days ago · 33 km deep · 99 km away
  9. 4.888 km SW of Atka, Alaska · 14649 days ago · 33 km deep · 88 km away
  10. 4.237 km E of Adak, Alaska · 14645 days ago · 33 km deep · 75 km away
  11. 4.364 km ESE of Adak, Alaska · 14642 days ago · 33 km deep · 65 km away
  12. 4.488 km SW of Atka, Alaska · 14631 days ago · 33 km deep · 88 km away
  13. 4.946 km SW of Adak, Alaska · 14618 days ago · 33 km deep · 79 km away
  14. 4.594 km SSW of Adak, Alaska · 14615 days ago · 33 km deep · 59 km away
  15. 4.1108 km SE of Adak, Alaska · 14605 days ago · 33 km deep · 54 km away
  16. 4.199 km SW of Atka, Alaska · 14604 days ago · 33 km deep · 78 km away
  17. 5.0110 km SSW of Atka, Alaska · 14603 days ago · 33 km deep · 83 km away

Before

  1. 4.883 km SSE of Adak, Alaska · 14662 days ago · 33 km deep · 4 km away
  2. 4.785 km SW of Atka, Alaska · 14666 days ago · 33 km deep · 92 km away
  3. 5.588 km WSW of Atka, Alaska · 14666 days ago · 33 km deep · 89 km away
  4. 4.844 km E of Adak, Alaska · 14667 days ago · 33 km deep · 79 km away
  5. 4.497 km SSE of Adak, Alaska · 14668 days ago · 33 km deep · 12 km away
  6. 4.793 km SSE of Adak, Alaska · 14669 days ago · 33 km deep · 15 km away
  7. 4.669 km ESE of Adak, Alaska · 14669 days ago · 33 km deep · 74 km away
  8. 5.683 km SSE of Adak, Alaska · 14669 days ago · 33 km deep · 10 km away
  9. 5.876 km SSE of Adak, Alaska · 14669 days ago · 33 km deep · 10 km away
  10. 4.993 km SW of Atka, Alaska · 14670 days ago · 33 km deep · 83 km away
  11. 4.952 km S of Adak, Alaska · 14671 days ago · 33 km deep · 47 km away
  12. 4.983 km SSE of Adak, Alaska · 14672 days ago · 33 km deep · 3 km away
  13. 5.257 km SSE of Adak, Alaska · 14672 days ago · 33 km deep · 31 km away
  14. 4.879 km SE of Adak, Alaska · 14673 days ago · 33 km deep · 43 km away
  15. 4.0101 km SW of Atka, Alaska · 14675 days ago · 33 km deep · 78 km away
  16. 5.026 km SW of Adak, Alaska · 14685 days ago · 57 km deep · 77 km away
  17. 5.527 km E of Adak, Alaska · 14685 days ago · 50 km deep · 83 km away
  18. 4.5Andreanof Islands, Aleutian Islands, Alaska · 14686 days ago · 33 km deep · 73 km away
  19. 4.569 km SE of Adak, Alaska · 14687 days ago · 33 km deep · 25 km away
  20. 4.975 km ESE of Adak, Alaska · 14691 days ago · 33 km deep · 48 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002wt0. Read Tue, Sep 22, 2026, 8:08 PM UTC.