Alaska earthquakes

M2.5 earthquake 86 km ENE of Chignik, Alaska

A magnitude 2.5 earthquake struck 86 km ENE of Chignik, Alaska on Fri, Sep 17, 2021, 10:35 AM AKDT (18:35 UTC), 12 km (7 mi) below the surface.

A larger quake followed: M2.8 92 km SSE of Ugashik, 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: 2.5 (ml), micro
Local time: Fri, Sep 17, 2021, 10:35 AM AKDT
UTC: 2021-09-17 18:35:37 UTC
Depth: 11.8 km (7.3 mi), shallow
Epicenter: 56.530° N, 157.067° 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: 41

Nearest places

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

Naknek, AlaskaPopulation 544. Forecast244 kmS

Nearby

Within 100 km, magnitude 1.5 and up: 172 in the 60 days after this one and 27 in the 30 days before it.

After

The first 60 of 172.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021byann7a (also filed as us6000fudi). Read Wed, Sep 23, 2026, 5:53 PM UTC.