Alaska earthquakes

M1.5 earthquake 133 km W of Adak, Alaska

A magnitude 1.5 earthquake struck 133 km W of Adak, Alaska on Thu, Mar 11, 2021, 6:13 AM HAST (16:13 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.9 224 km WSW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 1.5 (ml), micro
Local time: Thu, Mar 11, 2021, 6:13 AM HAST
UTC: 2021-03-11 16:13:03 UTC
Depth: 6.7 km (4.2 mi), shallow
Epicenter: 51.667° N, 178.534° 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: 24

Nearby

Within 100 km, magnitude 1.5 and up: 102 in the 60 days after this one and 67 in the 30 days before it.

After

The first 60 of 102.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak02138180yh (also filed as av91206671). Read Tue, Sep 29, 2026, 12:19 PM UTC.