Alaska earthquakes

M6.0 earthquake 94 km SE of Old Harbor, Alaska

A magnitude 6.0 earthquake struck 94 km SE of Old Harbor, Alaska on Mon, Mar 30, 1964, 6:09 AM GMT-10 (16:09 UTC), 15 km (10 mi) below the surface.

A larger quake followed: M6.1 95 km SSE 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
6.0 (mw), strong
Local time
UTC
1964-03-30 16:09:28 UTC
Depth
15.4 km (9.6 mi), shallow
Epicenter
56.598° N, 152.207° 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: 15 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 5.687 km SSE of Old Harbor, Alaska · 22820 days ago · 20 km deep · 23 km away
  2. 5.784 km SE of Chiniak, Alaska · 22819 days ago · 23 km deep · 81 km away
  3. 5.489 km SSE of Old Harbor, Alaska · 22818 days ago · 25 km deep · 28 km away
  4. 6.195 km SSE of Old Harbor, Alaska · 22816 days ago · 15 km deep · 44 km away
  5. 5.956 km SE of Old Harbor, Alaska · 22816 days ago · 22 km deep · 40 km away
  6. 6.395 km SSE of Akhiok, Alaska · 22815 days ago · 23 km deep · 84 km away
  7. 6.195 km SSE of Akhiok, Alaska · 22815 days ago · 28 km deep · 93 km away
  8. 6.398 km SE of Old Harbor, Alaska · 22808 days ago · 10 km deep · 15 km away
  9. 5.7133 km SE of Old Harbor, Alaska · 22808 days ago · 15 km deep · 39 km away
  10. 5.5111 km SSE of Old Harbor, Alaska · 22807 days ago · 11 km deep · 29 km away
  11. 6.495 km S of Old Harbor, Alaska · 22803 days ago · 23 km deep · 55 km away
  12. 6.199 km SSE of Old Harbor, Alaska · 22803 days ago · 10 km deep · 53 km away
  13. 5.645 km SSE of Chiniak, Alaska · 22797 days ago · 25 km deep · 76 km away
  14. 5.8102 km SE of Old Harbor, Alaska · 22784 days ago · 21 km deep · 8 km away
  15. 6.297 km SSE of Old Harbor, Alaska · 22778 days ago · 24 km deep · 19 km away

Before

  1. 5.8101 km SSE of Old Harbor, Alaska · 22821 days ago · 9 km deep · 36 km away
  2. 5.890 km SSE of Old Harbor, Alaska · 22821 days ago · 20 km deep · 35 km away
  3. 5.692 km SSE of Old Harbor, Alaska · 22821 days ago · 23 km deep · 27 km away
  4. 6.585 km SSE of Old Harbor, Alaska · 22821 days ago · 21 km deep · 52 km away
  5. 5.668 km ESE of Chiniak, Alaska · 22822 days ago · 20 km deep · 94 km away
  6. 6.253 km ESE of Old Harbor, Alaska · 22823 days ago · 25 km deep · 52 km away
  7. 5.872 km SSE of Old Harbor, Alaska · 22823 days ago · 20 km deep · 44 km away
  8. 5.9114 km SE of Old Harbor, Alaska · 22823 days ago · 20 km deep · 22 km away
  9. 5.639 km ESE of Chiniak, Alaska · 22823 days ago · 23 km deep · 100 km away
  10. 5.855 km SE of Chiniak, Alaska · 22823 days ago · 20 km deep · 84 km away
  11. 5.925 km E of Old Harbor, Alaska · 22823 days ago · 25 km deep · 75 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event iscgem870186 (also filed as ushis2671). Read Tue, Sep 22, 2026, 6:29 AM UTC.