Alaska earthquakes

M3.3 earthquake 65 km NE of Adak, Alaska

A magnitude 3.3 earthquake struck 65 km NE of Adak, Alaska on Sat, Nov 27, 2021, 1:51 PM HAST (23:51 UTC), 191 km (119 mi) below the surface.

A larger quake followed: M4.0 29 km SSW of Adak, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 3.3 (ml), minor
Local time: Sat, Nov 27, 2021, 1:51 PM HAST
UTC: 2021-11-27 23:51:23 UTC
Depth: 190.8 km (118.6 mi), intermediate-depth
Epicenter: 52.280° N, 175.947° 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 15.9 km horizontally, 6.2 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 171°
Stations used: 30

Nearby

Within 100 km, magnitude 1.5 and up: 107 in the 60 days after this one and 46 in the 30 days before it.

After

The first 60 of 107.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000fxl1 (also filed as ak021f7svttn). Read Thu, Sep 24, 2026, 10:30 AM UTC.