Alaska earthquakes

M4.8 earthquake 87 km SE of Atka, Alaska

A magnitude 4.8 earthquake struck 87 km SE of Atka, Alaska on Sat, May 7, 1977, 12:18 PM GMT-10 (22:18 UTC), 33 km (21 mi) below the surface.

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The earthquake

Magnitude
4.8 (mb), light
Local time
UTC
1977-05-07 22:18:42 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.685° N, 173.231° 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
103

Nearby

Within 100 km, magnitude 1.8 and up: 1 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 4.441 km SE of Atka, Alaska · 18002 days ago · 49 km deep · 48 km away

Before

  1. 4.880 km SE of Atka, Alaska · 18048 days ago · 42 km deep · 14 km away
  2. 3.986 km SSE of Atka, Alaska · 18048 days ago · 33 km deep · 26 km away
  3. 4.677 km SE of Atka, Alaska · 18048 days ago · 38 km deep · 13 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000nsu. Read Mon, Sep 28, 2026, 1:16 PM UTC.