Alaska earthquakes

M2.6 earthquake 256 km WSW of Adak, Alaska

A magnitude 2.6 earthquake struck 256 km WSW of Adak, Alaska on Thu, Nov 18, 2021, 8:27 PM GMT+12 (08:27 UTC), 31 km (19 mi) below the surface.

A larger quake followed: M2.8 Rat Islands, Aleutian Islands, Alaska. This one was a foreshock.

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

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The earthquake

Magnitude: 2.6 (ml), micro
Local time: Thu, Nov 18, 2021, 8:27 PM GMT+12
UTC: 2021-11-18 08:27:32 UTC
Depth: 31.1 km (19.3 mi), shallow
Epicenter: 51.259° N, 179.801° 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 3.4 km horizontally, 9.6 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 217°, poorly surrounded by stations
Stations used: 40

Nearby

Within 100 km, magnitude 1.5 and up: 83 in the 60 days after this one and 62 in the 30 days before it.

After

The first 60 of 83.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000gdwc (also filed as ak021esnz2mu). Read Thu, Sep 24, 2026, 10:03 AM UTC.