Alaska earthquakes

M5.9 earthquake 25 km E of Old Harbor, Alaska

A magnitude 5.9 earthquake struck 25 km E of Old Harbor, Alaska on Fri, Mar 27, 1964, 7:35 PM GMT-10 (05:35 UTC), 25 km (16 mi) below the surface.

A larger quake followed: M6.2 53 km ESE of Old Harbor, Alaska. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
5.9 (mw), moderate
Local time
UTC
1964-03-28 05:35:39 UTC
Depth
25.0 km (15.5 mi), shallow
Epicenter
57.158° N, 152.886° 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.

Magnitude uncertainty
±0.28
Depth from
From location

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 2.5 and up: 29 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 5.855 km SE of Chiniak, Alaska · 22823 days ago · 20 km deep · 78 km away
  2. 5.639 km ESE of Chiniak, Alaska · 22823 days ago · 23 km deep · 79 km away
  3. 5.9114 km SE of Old Harbor, Alaska · 22823 days ago · 20 km deep · 96 km away
  4. 5.872 km SSE of Old Harbor, Alaska · 22823 days ago · 20 km deep · 64 km away
  5. 5.53 km E of Kodiak, Alaska · 22823 days ago · 25 km deep · 77 km away
  6. 6.253 km ESE of Old Harbor, Alaska · 22823 days ago · 25 km deep · 28 km away
  7. 5.668 km ESE of Chiniak, Alaska · 22822 days ago · 20 km deep · 96 km away
  8. 5.550 km ESE of Chiniak, Alaska · 22822 days ago · 21 km deep · 90 km away
  9. 6.585 km SSE of Old Harbor, Alaska · 22821 days ago · 21 km deep · 79 km away
  10. 5.692 km SSE of Old Harbor, Alaska · 22821 days ago · 23 km deep · 79 km away
  11. 5.890 km SSE of Old Harbor, Alaska · 22821 days ago · 20 km deep · 78 km away
  12. 5.8101 km SSE of Old Harbor, Alaska · 22821 days ago · 9 km deep · 89 km away
  13. 6.094 km SE of Old Harbor, Alaska · 22821 days ago · 15 km deep · 75 km away
  14. 5.687 km SSE of Old Harbor, Alaska · 22820 days ago · 20 km deep · 72 km away
  15. 5.784 km SE of Chiniak, Alaska · 22819 days ago · 23 km deep · 99 km away
  16. 5.489 km SSE of Old Harbor, Alaska · 22818 days ago · 25 km deep · 76 km away
  17. 6.195 km SSE of Old Harbor, Alaska · 22816 days ago · 15 km deep · 85 km away
  18. 5.956 km SE of Old Harbor, Alaska · 22816 days ago · 22 km deep · 41 km away
  19. 6.398 km SE of Old Harbor, Alaska · 22808 days ago · 10 km deep · 81 km away
  20. 5.647 km ESE of Chiniak, Alaska · 22807 days ago · 27 km deep · 89 km away
  21. 5.5111 km SSE of Old Harbor, Alaska · 22807 days ago · 11 km deep · 95 km away
  22. 5.724 km S of Larsen Bay, Alaska · 22807 days ago · 35 km deep · 69 km away
  23. 5.89 km ENE of Port Lions, Alaska · 22805 days ago · 22 km deep · 83 km away
  24. 6.495 km S of Old Harbor, Alaska · 22804 days ago · 23 km deep · 89 km away
  25. 6.199 km SSE of Old Harbor, Alaska · 22803 days ago · 10 km deep · 91 km away
  26. 5.541 km E of Chiniak, Alaska · 22803 days ago · 20 km deep · 93 km away
  27. 5.645 km SSE of Chiniak, Alaska · 22797 days ago · 25 km deep · 61 km away
  28. 5.8102 km SE of Old Harbor, Alaska · 22784 days ago · 21 km deep · 83 km away
  29. 6.297 km SSE of Old Harbor, Alaska · 22778 days ago · 24 km deep · 82 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event iscgem869816 (also filed as ushis2645). Read Tue, Sep 22, 2026, 9:36 AM UTC.