Alaska earthquakes

M1.6 earthquake 91 km SSW of Unalaska, Alaska

A magnitude 1.6 earthquake struck 91 km SSW of Unalaska, Alaska on Sun, Aug 5, 2018, 8:45 PM AKDT (04:45 UTC), 47 km (29 mi) below the surface.

A larger quake followed: M4.6 24 km NE 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.

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The earthquake

Magnitude: 1.6 (ml), micro
Local time: Sun, Aug 5, 2018, 8:45 PM AKDT
UTC: 2018-08-06 04:45:22 UTC
Depth: 46.9 km (29.1 mi), shallow
Epicenter: 53.158° N, 167.222° 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. Forecast92 kmSSW

Nearby

Within 100 km, magnitude 1.5 and up: 76 in the 60 days after this one and 50 in the 30 days before it.

After

The first 60 of 76.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak018a0lt326 (also filed as ak20062380). Read Wed, Sep 30, 2026, 6:29 PM UTC.