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.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.8 (ml), micro
Local time
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.

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 todayAlaska earthquakesLive 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.