Alaska earthquakes

M1.6 earthquake 74 km S of Unalaska, Alaska

A magnitude 1.6 earthquake struck 74 km S of Unalaska, Alaska on Tue, Sep 5, 2017, 11:37 AM AKDT (19:37 UTC), 23 km (14 mi) below the surface.

A larger quake followed: M4.6 109 km S of Unalaska, 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.

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The earthquake

Magnitude: 1.6 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Tue, Sep 5, 2017, 11:37 AM AKDT
UTC: 2017-09-05 19:37:21 UTC
Depth: 22.9 km (14.2 mi), shallow
Epicenter: 53.209° N, 166.696° 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: 12

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast75 kmS

Nearby

Within 100 km, magnitude 1.5 and up: 106 in the 60 days after this one and 66 in the 30 days before it.

After

The first 60 of 106.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak017begta53 (also filed as ak16774082). Read Fri, Oct 2, 2026, 12:43 AM UTC.