Alaska earthquakes

M4.9 earthquake 129 km WSW of Adak, Alaska

A magnitude 4.9 earthquake struck 129 km WSW of Adak, Alaska on Fri, Jan 10, 1975, 9:40 AM GMT-11 (20:40 UTC), 63 km (39 mi) below the surface.

A larger quake followed: M6.5 200 km WSW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
4.9 (mb), light
Local time
UTC
1975-01-10 20:40:39 UTC
Depth
63.0 km (39.1 mi), shallow
Epicenter
51.585° N, 178.455° 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.

Stations used
35

Nearby

Within 100 km, magnitude 1.9 and up: 11 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 4.9124 km WSW of Adak, Alaska · 18880 days ago · 46 km deep · 40 km away
  2. 4.6196 km WSW of Adak, Alaska · 18878 days ago · 57 km deep · 73 km away
  3. 6.5200 km WSW of Adak, Alaska · 18840 days ago · 48 km deep · 71 km away
  4. 4.3211 km WSW of Adak, Alaska · 18840 days ago · 52 km deep · 82 km away
  5. 4.2213 km WSW of Adak, Alaska · 18840 days ago · 47 km deep · 86 km away
  6. 4.8205 km WSW of Adak, Alaska · 18840 days ago · 46 km deep · 76 km away
  7. 5.1197 km WSW of Adak, Alaska · 18839 days ago · 62 km deep · 68 km away
  8. 5.0201 km WSW of Adak, Alaska · 18839 days ago · 55 km deep · 72 km away
  9. 5.0194 km WSW of Adak, Alaska · 18839 days ago · 50 km deep · 67 km away
  10. 4.4192 km W of Adak, Alaska · 18838 days ago · 59 km deep · 66 km away
  11. 4.7186 km WSW of Adak, Alaska · 18838 days ago · 59 km deep · 57 km away

Before

  1. 4.6138 km WSW of Adak, Alaska · 18902 days ago · 55 km deep · 17 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00009fg. Read Tue, Sep 22, 2026, 9:10 AM UTC.