Alaska earthquakes

M2.3 earthquake 39 km SSE of Unalaska, Alaska

A magnitude 2.3 earthquake struck 39 km SSE of Unalaska, Alaska on Fri, Sep 23, 2016, 12:19 AM AKDT (08:19 UTC), 64 km (39 mi) below the surface.

A larger quake followed: M4.5 79 km SE of Akutan, 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: 2.3 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Fri, Sep 23, 2016, 12:19 AM AKDT
UTC: 2016-09-23 08:19:56 UTC
Depth: 63.5 km (39.5 mi), shallow
Epicenter: 53.539° N, 166.341° 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: 22

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast39 kmSSE

Nearby

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

After

The first 60 of 100.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak016c9pdbnk (also filed as ak14018598). Read Sun, Oct 4, 2026, 12:14 AM UTC.