Alaska earthquakes

M2.5 earthquake 36 km E of Adak, Alaska

A magnitude 2.5 earthquake struck 36 km E of Adak, Alaska on Sat, Nov 27, 2021, 5:40 PM HAST (03:40 UTC), 130 km (81 mi) below the surface.

A larger quake followed: M3.4 54 km SE of Adak, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 2.5 (ml), micro
Local time: Sat, Nov 27, 2021, 5:40 PM HAST
UTC: 2021-11-28 03:40:25 UTC
Depth: 130.4 km (81.0 mi), intermediate-depth
Epicenter: 51.935° N, 176.111° 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 13.9 km horizontally, 4.4 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 171°
Stations used: 19

Nearby

Within 100 km, magnitude 1.5 and up: 142 in the 60 days after this one and 57 in the 30 days before it.

After

The first 60 of 142.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000g7v4 (also filed as ak021f94g5fe). Read Thu, Sep 24, 2026, 5:17 AM UTC.