Alaska earthquakes

M2.7 earthquake 59 km SSE of Adak, Alaska

A magnitude 2.7 earthquake struck 59 km SSE of Adak, Alaska on Tue, Oct 26, 2021, 11:33 AM HADT (20:33 UTC), 34 km (21 mi) below the surface.

A larger quake followed: M2.9 74 km W of Atka, Alaska. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 2.7 (ml), micro
Local time: Tue, Oct 26, 2021, 11:33 AM HADT
UTC: 2021-10-26 20:33:55 UTC
Depth: 33.7 km (21.0 mi), shallow
Epicenter: 51.417° N, 176.195° 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 6.4 km horizontally, 18.4 km in depth
Magnitude uncertainty: ±0.15
Depth from: From location
Station coverage gap: 240°, poorly surrounded by stations
Stations used: 20

Nearby

Within 100 km, magnitude 1.5 and up: 149 in the 60 days after this one and 42 in the 30 days before it.

After

The first 60 of 149.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000g9ry (also filed as ak021dqtsm6p). Read Thu, Sep 24, 2026, 10:03 AM UTC.