Alaska earthquakes

M6.4 earthquake 95 km S of Old Harbor, Alaska

A magnitude 6.4 earthquake struck 95 km S of Old Harbor, Alaska on Thu, Apr 16, 1964, 9:26 AM GMT-10 (19:26 UTC), 23 km (14 mi) below the surface.

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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
6.4 (mw), strong
Local time
UTC
1964-04-16 19:26:58 UTC
Depth
22.5 km (14.0 mi), shallow
Epicenter
56.363° N, 153.000° 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
±0.20
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: 5 in the 60 days after this one and 24 in the 30 days before it.

After

  1. 6.199 km SSE of Old Harbor, Alaska · 22803 days ago · 10 km deep · 5 km away
  2. 5.891 km SSE of Akhiok, Alaska · 22801 days ago · 22 km deep · 54 km away
  3. 5.8102 km SE of Old Harbor, Alaska · 22784 days ago · 21 km deep · 58 km away
  4. 5.847 km S of Akhiok, Alaska · 22782 days ago · 25 km deep · 72 km away
  5. 6.297 km SSE of Old Harbor, Alaska · 22778 days ago · 24 km deep · 38 km away

Before

  1. 6.254 km S of Akhiok, Alaska · 22805 days ago · 29 km deep · 78 km away
  2. 5.5111 km SSE of Old Harbor, Alaska · 22807 days ago · 11 km deep · 40 km away
  3. 5.7133 km SE of Old Harbor, Alaska · 22808 days ago · 15 km deep · 83 km away
  4. 6.398 km SE of Old Harbor, Alaska · 22808 days ago · 10 km deep · 43 km away
  5. 6.195 km SSE of Akhiok, Alaska · 22815 days ago · 28 km deep · 38 km away
  6. 6.395 km SSE of Akhiok, Alaska · 22815 days ago · 23 km deep · 29 km away
  7. 6.570 km SSW of Akhiok, Alaska · 22816 days ago · 23 km deep · 92 km away
  8. 6.378 km SSW of Akhiok, Alaska · 22816 days ago · 20 km deep · 90 km away
  9. 5.956 km SE of Old Harbor, Alaska · 22816 days ago · 22 km deep · 51 km away
  10. 6.195 km SSE of Old Harbor, Alaska · 22816 days ago · 15 km deep · 12 km away
  11. 5.489 km SSE of Old Harbor, Alaska · 22818 days ago · 25 km deep · 27 km away
  12. 5.687 km SSE of Old Harbor, Alaska · 22820 days ago · 20 km deep · 33 km away
  13. 6.094 km SE of Old Harbor, Alaska · 22821 days ago · 15 km deep · 55 km away
  14. 5.8101 km SSE of Old Harbor, Alaska · 22821 days ago · 9 km deep · 23 km away
  15. 5.890 km SSE of Old Harbor, Alaska · 22821 days ago · 20 km deep · 20 km away
  16. 5.692 km SSE of Old Harbor, Alaska · 22821 days ago · 23 km deep · 28 km away
  17. 6.585 km SSE of Old Harbor, Alaska · 22821 days ago · 21 km deep · 10 km away
  18. 6.289 km S of Akhiok, Alaska · 22822 days ago · 22 km deep · 88 km away
  19. 6.576 km S of Akhiok, Alaska · 22823 days ago · 25 km deep · 76 km away
  20. 6.567 km S of Akhiok, Alaska · 22823 days ago · 21 km deep · 71 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event iscgem868825 (also filed as ushis2694). Read Tue, Sep 22, 2026, 7:26 AM UTC.