Alaska earthquakes

M3.4 earthquake 51 km SSW of Unalaska, Alaska

A magnitude 3.4 earthquake struck 51 km SSW of Unalaska, Alaska on Sat, Jun 28, 2025, 10:54 AM AKDT (18:54 UTC), 80 km (49 mi) below the surface.

A larger quake followed: M5.3 23 km N of Dutch Harbor, 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: 3.4 (mb), minor
Local time: Sat, Jun 28, 2025, 10:54 AM AKDT
UTC: 2025-06-28 18:54:01 UTC
Depth: 79.6 km (49.5 mi), intermediate-depth
Epicenter: 53.440° N, 166.801° 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 8.0 km horizontally, 9.2 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 163°
Stations used: 59

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast51 kmSSW

Nearby

Within 100 km, magnitude 1.5 and up: 137 in the 60 days after this one and 77 in the 30 days before it.

After

The first 60 of 137.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000qchv (also filed as ak02588c8i5k). Read Wed, Sep 30, 2026, 2:56 PM UTC.