Alaska earthquakes

M3.1 earthquake 216 km W of Adak, Alaska

A magnitude 3.1 earthquake struck 216 km W of Adak, Alaska on Wed, Oct 13, 2021, 11:18 PM HADT (08:18 UTC), 110 km (68 mi) below the surface.

A larger quake followed: M3.2 181 km WSW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 3.1 (ml), minor
Local time: Wed, Oct 13, 2021, 11:18 PM HADT
UTC: 2021-10-14 08:18:08 UTC
Depth: 109.5 km (68.1 mi), intermediate-depth
Epicenter: 51.792° N, 179.776° 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 4.6 km horizontally, 7.7 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 143°
Stations used: 45

Nearby

Within 100 km, magnitude 1.5 and up: 93 in the 60 days after this one and 57 in the 30 days before it.

After

The first 60 of 93.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000g9la (also filed as ak021d6s3y63). Read Thu, Sep 24, 2026, 9:06 AM UTC.