Alaska earthquakes

M2.8 earthquake 22 km SSE of Unalaska, Alaska

A magnitude 2.8 earthquake struck 22 km SSE of Unalaska, Alaska on Mon, Oct 21, 2019, 11:53 PM AKDT (07:53 UTC), 78 km (48 mi) below the surface.

A larger quake followed: M4.3 52 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.

Open the live map with earthquakes

The earthquake

Magnitude: 2.8 (ml), micro
Local time: Mon, Oct 21, 2019, 11:53 PM AKDT
UTC: 2019-10-22 07:53:08 UTC
Depth: 77.8 km (48.4 mi), intermediate-depth
Epicenter: 53.690° N, 166.406° 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 17.1 km horizontally, 26.2 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 192°, poorly surrounded by stations
Stations used: 25

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast22 kmSSE

Nearby

Within 100 km, magnitude 1.5 and up: 78 in the 60 days after this one and 57 in the 30 days before it.

After

The first 60 of 78.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us600068wg (also filed as ak019dk00sl6). Read Wed, Sep 30, 2026, 4:34 AM UTC.