Alaska earthquakes

M4.9 earthquake 68 km SSE of Old Harbor, Alaska

A magnitude 4.9 earthquake struck 68 km SSE of Old Harbor, Alaska on Sat, Apr 15, 1978, 11:50 PM GMT-10 (09:50 UTC), 24 km (15 mi) below the surface.

Womens Bay forecastMore in Alaska

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
4.9 (mb), light
Local time
UTC
1978-04-16 09:50:52 UTC
Depth
24.0 km (14.9 mi), shallow
Epicenter
56.663° N, 152.757° 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
CONSTRAINED_BY_DEPTH_PHASES
Stations used
137

Nearest places

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

Nearby

Within 100 km, magnitude 1.9 and up: 5 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 4.596 km SSE of Old Harbor, Alaska · 17689 days ago · 33 km deep · 33 km away
  2. 4.7Kodiak Island region, Alaska · 17685 days ago · 33 km deep · 20 km away
  3. 4.778 km SSE of Old Harbor, Alaska · 17680 days ago · 33 km deep · 10 km away
  4. 4.337 km ENE of Old Harbor, Alaska · 17679 days ago · 70 km deep · 69 km away
  5. 4.7104 km SSE of Old Harbor, Alaska · 17656 days ago · 33 km deep · 36 km away

Before

  1. 4.397 km SSE of Old Harbor, Alaska · 17693 days ago · 33 km deep · 34 km away
  2. 4.5134 km SSE of Old Harbor, Alaska · 17694 days ago · 33 km deep · 66 km away
  3. 5.175 km SSE of Old Harbor, Alaska · 17695 days ago · 27 km deep · 11 km away
  4. 4.6103 km SSE of Old Harbor, Alaska · 17695 days ago · 19 km deep · 35 km away
  5. 5.193 km SSE of Old Harbor, Alaska · 17695 days ago · 24 km deep · 25 km away
  6. 4.6105 km SSE of Old Harbor, Alaska · 17695 days ago · 15 km deep · 37 km away
  7. 4.776 km SSE of Old Harbor, Alaska · 17695 days ago · 16 km deep · 9 km away
  8. 4.791 km SSE of Old Harbor, Alaska · 17695 days ago · 33 km deep · 23 km away
  9. 5.239 km SE of Akhiok, Alaska · 17695 days ago · 23 km deep · 54 km away
  10. 6.694 km SSE of Old Harbor, Alaska · 17695 days ago · 14 km deep · 27 km away
  11. 4.06 km N of Akhiok, Alaska · 17713 days ago · 33 km deep · 94 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000u4p. Read Tue, Sep 22, 2026, 9:12 AM UTC.