Alaska earthquakes

M2.3 earthquake 14 km WNW of Nikiski, Alaska

A magnitude 2.3 earthquake struck 14 km WNW of Nikiski, Alaska on Tue, Sep 21, 2021, 5:54 PM AKDT (01:54 UTC), 71 km (44 mi) below the surface.

A larger quake followed: M4.7 12 km SSW of Clam Gulch, Alaska. This one was a foreshock.

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

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The earthquake

Magnitude: 2.3 (ml), micro
Local time: Tue, Sep 21, 2021, 5:54 PM AKDT
UTC: 2021-09-22 01:54:35 UTC
Depth: 70.5 km (43.8 mi), intermediate-depth
Epicenter: 60.763° N, 151.513° 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: 84

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 200 in the 60 days after this one and 138 in the 30 days before it.

After

The first 60 of at least 200.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021c6ac1v7 (also filed as us7000fdav). Read Sun, Sep 27, 2026, 4:12 AM UTC.