Alaska earthquakes

M2.9 earthquake 132 km WSW of Adak, Alaska

A magnitude 2.9 earthquake struck 132 km WSW of Adak, Alaska on Thu, Oct 7, 2021, 9:36 PM HADT (06:36 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.2 70 km SW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.9 (ml), micro
Local time: Thu, Oct 7, 2021, 9:36 PM HADT
UTC: 2021-10-08 06:36:32 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 51.602° N, 178.503° 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.

Location uncertainty: About 1.8 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.12
Depth from: Operator assigned
Station coverage gap: 178°
Stations used: 41

Nearby

Within 100 km, magnitude 1.5 and up: 138 in the 60 days after this one and 61 in the 30 days before it.

After

The first 60 of 138.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000ft4l (also filed as av91389346, ak021cwtswqh). Read Thu, Sep 24, 2026, 9:06 AM UTC.