Alaska earthquakes

M1.7 earthquake 20 km WSW of Dutch Harbor, Alaska

A magnitude 1.7 earthquake struck 20 km WSW of Dutch Harbor, Alaska on Thu, Sep 16, 2021, 3:48 PM AKDT (23:48 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.4 77 km S of Unalaska, Alaska. This one was a foreshock.

Dutch Harbor forecast More in Alaska

Map

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

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The earthquake

Magnitude: 1.7 (ml), micro
Local time: Thu, Sep 16, 2021, 3:48 PM AKDT
UTC: 2021-09-16 23:48:53 UTC
Depth: 6.0 km (3.7 mi), shallow
Epicenter: 53.845° N, 166.849° 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.

Stations used: 20

Nearest places

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

Dutch Harbor, AlaskaPopulation 4,376. Forecast21 kmWSW

Nearby

Within 100 km, magnitude 1.5 and up: 80 in the 60 days after this one and 31 in the 30 days before it.

After

The first 60 of 80.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021bwq69f7 (also filed as av91376211). Read Wed, Sep 30, 2026, 9:07 PM UTC.