Alaska earthquakes

M2.8 earthquake 71 km SE of Ugashik, Alaska

A magnitude 2.8 earthquake struck 71 km SE of Ugashik, Alaska on Thu, Aug 5, 2021, 4:39 AM AKDT (12:39 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.9 40 km SW of Karluk, Alaska. This one was a foreshock.

Naknek 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: 2.8 (ml), micro
Local time: Thu, Aug 5, 2021, 4:39 AM AKDT
UTC: 2021-08-05 12:39:55 UTC
Depth: 6.4 km (4.0 mi), shallow
Epicenter: 57.139° N, 156.443° 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.

Stations used: 69

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 116 in the 60 days after this one and 76 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 ak0219z2zzkc (also filed as us6000f2f3). Read Tue, Sep 22, 2026, 10:25 PM UTC.