Alaska earthquakes

M2.9 earthquake 48 km SW of Unalaska, Alaska

A magnitude 2.9 earthquake struck 48 km SW of Unalaska, Alaska on Thu, Sep 2, 2021, 6:59 AM AKDT (14:59 UTC), 96 km (60 mi) below the surface.

A larger quake followed: M3.1 74 km NNE of Nikolski, Alaska. This one was a foreshock.

Unalaska forecast More in Alaska

Map

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

Open the live map with earthquakes

The earthquake

Magnitude: 2.9 (ml), micro
Local time: Thu, Sep 2, 2021, 6:59 AM AKDT
UTC: 2021-09-02 14:59:30 UTC
Depth: 95.8 km (59.6 mi), intermediate-depth
Epicenter: 53.533° N, 166.983° 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 8.8 km horizontally, 9.8 km in depth
Magnitude uncertainty: ±0.09
Depth from: From location
Station coverage gap: 174°
Stations used: 26

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Unalaska, AlaskaPopulation 4,491. Forecast48 kmSW

Nearby

Within 100 km, magnitude 1.5 and up: 83 in the 60 days after this one and 38 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 us7000fc77 (also filed as ak021b9fct51). Read Wed, Sep 23, 2026, 2:25 PM UTC.