Alaska earthquakes

M5.8 earthquake 55 km SE of Chiniak, Alaska

A magnitude 5.8 earthquake struck 55 km SE of Chiniak, Alaska on Fri, Mar 27, 1964, 9:30 PM GMT-10 (07:30 UTC), 20 km (12 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
5.8 (mw), moderate
Local time
UTC
1964-03-28 07:30:31 UTC
Depth
20.0 km (12.4 mi), shallow
Epicenter
57.277° N, 151.602° 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
±0.44
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: 17 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 5.884 km ENE of Kodiak, Alaska · 22822 days ago · 21 km deep · 91 km away
  2. 5.639 km ESE of Chiniak, Alaska · 22822 days ago · 23 km deep · 20 km away
  3. 5.53 km E of Kodiak, Alaska · 22822 days ago · 25 km deep · 72 km away
  4. 6.253 km ESE of Old Harbor, Alaska · 22822 days ago · 25 km deep · 59 km away
  5. 5.682 km ENE of Kodiak, Alaska · 22822 days ago · 22 km deep · 92 km away
  6. 5.668 km ESE of Chiniak, Alaska · 22822 days ago · 20 km deep · 18 km away
  7. 5.550 km ESE of Chiniak, Alaska · 22822 days ago · 21 km deep · 22 km away
  8. 6.094 km SE of Old Harbor, Alaska · 22820 days ago · 15 km deep · 84 km away
  9. 5.784 km SE of Chiniak, Alaska · 22819 days ago · 23 km deep · 29 km away
  10. 5.956 km SE of Old Harbor, Alaska · 22815 days ago · 22 km deep · 88 km away
  11. 6.398 km SE of Old Harbor, Alaska · 22808 days ago · 10 km deep · 98 km away
  12. 5.7133 km SE of Old Harbor, Alaska · 22807 days ago · 15 km deep · 96 km away
  13. 5.647 km ESE of Chiniak, Alaska · 22806 days ago · 27 km deep · 23 km away
  14. 5.89 km ENE of Port Lions, Alaska · 22805 days ago · 22 km deep · 97 km away
  15. 5.541 km E of Chiniak, Alaska · 22802 days ago · 20 km deep · 38 km away
  16. 5.645 km SSE of Chiniak, Alaska · 22796 days ago · 25 km deep · 18 km away
  17. 5.8102 km SE of Old Harbor, Alaska · 22783 days ago · 21 km deep · 87 km away

Before

  1. 5.925 km E of Old Harbor, Alaska · 22823 days ago · 25 km deep · 78 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event iscgem869840 (also filed as ushis2652). Read Mon, Sep 21, 2026, 7:59 PM UTC.