Alaska earthquakes

M3.0 earthquake 71 km S of Unalaska, Alaska

A magnitude 3.0 earthquake struck 71 km S of Unalaska, Alaska on Sat, Jun 9, 2018, 7:40 AM AKDT (15:40 UTC), 49 km (31 mi) below the surface.

A larger quake followed: M4.6 135 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: 3.0 (ml), minor
Local time: Sat, Jun 9, 2018, 7:40 AM AKDT
UTC: 2018-06-09 15:40:07 UTC
Depth: 49.1 km (30.5 mi), shallow
Epicenter: 53.239° N, 166.733° 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 6.9 km horizontally, 25.0 km in depth
Depth from: From location
Station coverage gap: 210°, 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. Forecast72 kmS

Nearby

Within 100 km, magnitude 1.5 and up: 102 in the 60 days after this one and 40 in the 30 days before it.

After

The first 60 of 102.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000etgu (also filed as ak19738858, ak0187cv5m73). Read Wed, Sep 30, 2026, 11:14 PM UTC.