Alaska earthquakes

M3.0 earthquake 199 km WSW of Adak, Alaska

A magnitude 3.0 earthquake struck 199 km WSW of Adak, Alaska on Thu, Oct 14, 2021, 3:39 AM HADT (12:39 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.2 157 km SW of Adak, Alaska. This one was a foreshock.

Map

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

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The earthquake

Magnitude: 3.0 (ml), minor
Local time: Thu, Oct 14, 2021, 3:39 AM HADT
UTC: 2021-10-14 12:39:54 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 51.037° N, 179.168° 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 2.0 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.10
Depth from: Operator assigned
Station coverage gap: 230°, poorly surrounded by stations
Stations used: 28

Nearby

Within 100 km, magnitude 1.5 and up: 111 in the 60 days after this one and 70 in the 30 days before it.

After

The first 60 of 111.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000g9u9 (also filed as ak021d6uma7g). Read Thu, Sep 24, 2026, 8:32 AM UTC.