Alaska earthquakes

M4.1 earthquake 102 km SE of Old Harbor, Alaska

A magnitude 4.1 earthquake struck 102 km SE of Old Harbor, Alaska on Sat, Aug 3, 1974, 11:03 AM GMT-9 (20:03 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.3 86 km SE 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
4.1 (mb), light
Local time
UTC
1974-08-03 20:03:31 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
56.542° N, 152.140° 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.

Depth from
OPERATOR_ASSIGNED
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 20 in the 30 days before it.

After

  1. 4.393 km ESE of Old Harbor, Alaska · 19050 days ago · 40 km deep · 25 km away
  2. 4.788 km SE of Old Harbor, Alaska · 19048 days ago · 16 km deep · 20 km away
  3. 4.676 km SE of Old Harbor, Alaska · 19048 days ago · 33 km deep · 26 km away
  4. 4.676 km SE of Old Harbor, Alaska · 19048 days ago · 32 km deep · 29 km away
  5. 5.386 km SE of Old Harbor, Alaska · 19048 days ago · 33 km deep · 16 km away
  6. 3.969 km SE of Old Harbor, Alaska · 19048 days ago · 67 km deep · 37 km away
  7. 4.675 km SE of Old Harbor, Alaska · 19047 days ago · 33 km deep · 27 km away
  8. 4.585 km ESE of Old Harbor, Alaska · 19047 days ago · 33 km deep · 28 km away
  9. 5.1105 km SSE of Chiniak, Alaska · 19007 days ago · 17 km deep · 36 km away

Before

  1. 4.193 km SE of Old Harbor, Alaska · 19052 days ago · 36 km deep · 9 km away
  2. 4.058 km S of Chiniak, Alaska · 19053 days ago · 64 km deep · 61 km away
  3. 4.081 km SE of Old Harbor, Alaska · 19053 days ago · 33 km deep · 26 km away
  4. 3.893 km SE of Old Harbor, Alaska · 19053 days ago · 33 km deep · 17 km away
  5. 3.993 km SE of Old Harbor, Alaska · 19054 days ago · 33 km deep · 11 km away
  6. 4.192 km SE of Old Harbor, Alaska · 19054 days ago · 33 km deep · 14 km away
  7. 6.089 km SE of Old Harbor, Alaska · 19054 days ago · 33 km deep · 13 km away
  8. 3.899 km SE of Old Harbor, Alaska · 19054 days ago · 33 km deep · 22 km away
  9. 4.2101 km SE of Old Harbor, Alaska · 19054 days ago · 16 km deep · 8 km away
  10. 3.9101 km SSE of Chiniak, Alaska · 19054 days ago · 33 km deep · 28 km away
  11. 4.397 km SE of Old Harbor, Alaska · 19054 days ago · 15 km deep · 13 km away
  12. 4.486 km SE of Old Harbor, Alaska · 19054 days ago · 16 km deep · 19 km away
  13. 3.891 km SE of Old Harbor, Alaska · 19054 days ago · 27 km deep · 14 km away
  14. 4.386 km SE of Old Harbor, Alaska · 19054 days ago · 7 km deep · 19 km away
  15. 4.597 km SE of Old Harbor, Alaska · 19054 days ago · 19 km deep · 12 km away
  16. 3.898 km ESE of Old Harbor, Alaska · 19054 days ago · 33 km deep · 24 km away
  17. 4.687 km SE of Old Harbor, Alaska · 19054 days ago · 15 km deep · 16 km away
  18. 6.394 km SE of Old Harbor, Alaska · 19054 days ago · 33 km deep · 14 km away
  19. 6.197 km SE of Old Harbor, Alaska · 19054 days ago · 10 km deep · 11 km away
  20. 4.690 km SE of Old Harbor, Alaska · 19054 days ago · 24 km deep · 20 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00007fs. Read Wed, Sep 30, 2026, 10:40 PM UTC.