Alaska earthquakes

M3.3 earthquake 15 km SW of Unalaska, Alaska

A magnitude 3.3 earthquake struck 15 km SW of Unalaska, Alaska on Wed, Jun 17, 2020, 2:31 AM AKDT (10:31 UTC), 12 km (8 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: 3.3 (ml), minor
Local time: Wed, Jun 17, 2020, 2:31 AM AKDT
UTC: 2020-06-17 10:31:33 UTC
Depth: 12.2 km (7.6 mi), shallow
Epicenter: 53.786° N, 166.725° 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 2.3 km horizontally, 2.9 km in depth
Magnitude uncertainty: ±0.15
Depth from: From location
Station coverage gap: 176°
Stations used: 40

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast16 kmSW

Nearby

Within 100 km, magnitude 1.5 and up: 116 in the 60 days after this one and 93 in the 30 days before it.

After

The first 60 of 116.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000adfg (also filed as av62183111, ak0207rnypbl). Read Tue, Sep 29, 2026, 1:04 PM UTC.