Alaska earthquakes

M3.8 earthquake 16 km SW of Unalaska, Alaska

A magnitude 3.8 earthquake struck 16 km SW of Unalaska, Alaska on Mon, Jun 15, 2020, 6:38 PM AKDT (02:38 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.3 74 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: 3.8 (ml), minor
Local time: Mon, Jun 15, 2020, 6:38 PM AKDT
UTC: 2020-06-16 02:38:51 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 53.773° N, 166.719° 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 1.7 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.15
Depth from: Operator assigned
Station coverage gap: 178°
Stations used: 44

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast17 kmSW

Nearby

Within 100 km, magnitude 1.5 and up: 164 in the 60 days after this one and 46 in the 30 days before it.

After

The first 60 of 164.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000aclg (also filed as ak0207pvpemi, av62181141, av62181151). Read Tue, Sep 29, 2026, 8:45 AM UTC.