Alaska earthquakes

M5.5 earthquake 122 km ENE of Kodiak, Alaska

A magnitude 5.5 earthquake struck 122 km ENE of Kodiak, Alaska on Sun, Mar 29, 1964, 12:49 AM GMT-10 (10:49 UTC), 23 km (14 mi) below the surface.

A larger quake followed: M5.6 141 km SE of Halibut Cove, Alaska. This one was a foreshock.

Kodiak forecastMore in Alaska

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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
5.5 (mw), moderate
Local time
UTC
1964-03-29 10:49:41 UTC
Depth
22.6 km (14.0 mi), shallow
Epicenter
58.138° N, 150.437° 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
±0.37
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: 4 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 5.6141 km SE of Halibut Cove, Alaska · 22821 days ago · 20 km deep · 75 km away
  2. 5.5107 km ENE of Ouzinkie, Alaska · 22811 days ago · 18 km deep · 22 km away
  3. 5.647 km ESE of Chiniak, Alaska · 22807 days ago · 27 km deep · 98 km away
  4. 5.541 km E of Chiniak, Alaska · 22803 days ago · 20 km deep · 89 km away

Before

  1. 5.550 km ESE of Chiniak, Alaska · 22823 days ago · 21 km deep · 97 km away
  2. 5.6108 km ENE of Chiniak, Alaska · 22823 days ago · 20 km deep · 18 km away
  3. 5.682 km ENE of Kodiak, Alaska · 22823 days ago · 22 km deep · 41 km away
  4. 5.884 km ENE of Kodiak, Alaska · 22823 days ago · 21 km deep · 38 km away
  5. 6.4138 km SE of Halibut Cove, Alaska · 22823 days ago · 20 km deep · 94 km away
  6. 5.8135 km SE of Halibut Cove, Alaska · 22823 days ago · 19 km deep · 86 km away
  7. 6.578 km ENE of Ouzinkie, Alaska · 22823 days ago · 25 km deep · 51 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event iscgem870071. Read Tue, Sep 22, 2026, 3:15 PM UTC.