Alaska earthquakes

M2.9 earthquake 50 km SE of Nikolski, Alaska

A magnitude 2.9 earthquake struck 50 km SE of Nikolski, Alaska on Wed, Dec 15, 2021, 3:17 PM AKST (00:17 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M3.7 131 km SE 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: Wed, Dec 15, 2021, 3:17 PM AKST
UTC: 2021-12-16 00:17:34 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 52.669° N, 168.261° 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 2.9 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.10
Depth from: Operator assigned
Station coverage gap: 217°, poorly surrounded by stations
Stations used: 23

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast177 kmSW

Nearby

Within 100 km, magnitude 1.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000gf3e (also filed as ak021g2u76r7). Read Wed, Sep 23, 2026, 3:40 PM UTC.