Alaska earthquakes

M2.3 earthquake 42 km W of Nikiski, Alaska

A magnitude 2.3 earthquake struck 42 km W of Nikiski, Alaska on Wed, Oct 27, 2021, 12:03 AM AKDT (08:03 UTC), 86 km (54 mi) below the surface.

A larger quake followed: M5.9 58 km E of Port Alsworth, Alaska. This one was a foreshock.

Nikiski forecast More in Alaska

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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: Wed, Oct 27, 2021, 12:03 AM AKDT
UTC: 2021-10-27 08:03:00 UTC
Depth: 86.4 km (53.7 mi), intermediate-depth
Epicenter: 60.744° N, 152.060° 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: 121

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 201 in the 60 days after this one and 183 in the 30 days before it.

After

The first 60 of at least 201.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021dsa051c (also filed as us7000fp52). Read Thu, Sep 24, 2026, 10:32 AM UTC.