Alaska earthquakes

M2.7 earthquake 272 km W of Adak, Alaska

A magnitude 2.7 earthquake struck 272 km W of Adak, Alaska on Sun, Sep 12, 2021, 5:10 PM GMT+12 (05:10 UTC), 75 km (46 mi) below the surface.

A larger quake followed: M5.1 Rat Islands, Aleutian Islands, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 2.7 (ml), micro
Local time: Sun, Sep 12, 2021, 5:10 PM GMT+12
UTC: 2021-09-12 05:10:26 UTC
Depth: 74.8 km (46.5 mi), intermediate-depth
Epicenter: 51.633° N, 179.436° E
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 3.9 km horizontally, 3.5 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 105°
Stations used: 29

Nearby

Within 100 km, magnitude 1.5 and up: 90 in the 60 days after this one and 86 in the 30 days before it.

After

The first 60 of 90.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000ftu8 (also filed as ak021bpt2v4r). Read Thu, Sep 24, 2026, 2:34 PM UTC.