Alaska earthquakes

M4.9 earthquake 145 km WSW of Adak, Alaska

A magnitude 4.9 earthquake struck 145 km WSW of Adak, Alaska on Tue, Feb 17, 1976, 9:00 PM GMT-11 (08:00 UTC), 39 km (24 mi) below the surface.

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The earthquake

Magnitude
4.9 (mb), light
Local time
UTC
1976-02-18 08:00:58 UTC
Depth
39.0 km (24.2 mi), shallow
Epicenter
51.573° N, 178.676° 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
45

Nearby

Within 100 km, magnitude 1.9 and up: 8 in the 60 days after this one and 0 in the 30 days before it.

After

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000f3q (also filed as iscgem717981). Read Tue, Sep 22, 2026, 7:25 AM UTC.