Alaska earthquakes

M2.5 earthquake 66 km S of Unalaska, Alaska

A magnitude 2.5 earthquake struck 66 km S of Unalaska, Alaska on Sun, Aug 13, 2023, 11:37 AM AKDT (19:37 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.3 96 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
2.5 (ml), micro
Local time
UTC
2023-08-13 19:37:07 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
53.286° N, 166.389° 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 2.7 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.13
Depth from
Operator assigned
Station coverage gap
206°, poorly surrounded by stations
Stations used
15

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 141 in the 60 days after this one and 99 in the 30 days before it.

After

The first 60 of 141.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000krye (also filed as ak023acfg9ia). Read Mon, Sep 28, 2026, 11:56 AM UTC.