Alaska earthquakes

M4.9 earthquake 117 km WSW of Adak, Alaska

A magnitude 4.9 earthquake struck 117 km WSW of Adak, Alaska on Wed, Apr 2, 1975, 4:43 AM GMT-10 (14:43 UTC), 62 km (39 mi) below the surface.

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The earthquake

Magnitude
4.9 (mb), light
Local time
UTC
1975-04-02 14:43:21 UTC
Depth
62.0 km (38.5 mi), shallow
Epicenter
51.619° N, 178.289° 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
47

Nearby

Within 100 km, magnitude 1.9 and up: 1 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 4.2161 km SW of Adak, Alaska · 18766 days ago · 33 km deep · 73 km away

Before

  1. 5.4211 km WSW of Adak, Alaska · 18814 days ago · 57 km deep · 94 km away
  2. 4.3205 km WSW of Adak, Alaska · 18815 days ago · 63 km deep · 95 km away
  3. 5.485 km WSW of Adak, Alaska · 18822 days ago · 54 km deep · 38 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000af7. Read Tue, Sep 22, 2026, 6:39 AM UTC.