Alaska earthquakes

M4.7 earthquake 113 km WSW of Adak, Alaska

A magnitude 4.7 earthquake struck 113 km WSW of Adak, Alaska on Sun, Mar 7, 1976, 3:28 PM GMT-11 (02:28 UTC), 54 km (34 mi) below the surface.

A larger quake followed: M4.8 189 km WSW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
4.7 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1976-03-08 02:28:47 UTC
Depth
54.0 km (33.6 mi), shallow
Epicenter
51.339° N, 178.035° 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
63

Nearby

Within 100 km, magnitude 1.7 and up: 6 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.8189 km WSW of Adak, Alaska · 18470 days ago · 58 km deep · 77 km away
  2. 4.3163 km WSW of Adak, Alaska · 18469 days ago · 64 km deep · 64 km away
  3. 4.3180 km WSW of Adak, Alaska · 18468 days ago · 64 km deep · 73 km away
  4. 4.1191 km WSW of Adak, Alaska · 18468 days ago · 63 km deep · 80 km away
  5. 4.7179 km WSW of Adak, Alaska · 18442 days ago · 64 km deep · 77 km away
  6. 4.3140 km SSW of Adak, Alaska · 18436 days ago · 44 km deep · 85 km away

Before

  1. 4.3140 km WSW of Adak, Alaska · 18480 days ago · 30 km deep · 35 km away
  2. 4.8136 km WSW of Adak, Alaska · 18480 days ago · 32 km deep · 43 km away
  3. 5.022 km SW of Adak, Alaska · 18487 days ago · 58 km deep · 92 km away
  4. 4.9145 km WSW of Adak, Alaska · 18490 days ago · 39 km deep · 51 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000fbt. Read Sat, Oct 3, 2026, 7:02 PM UTC.