Alaska earthquakes

M2.5 earthquake 44 km E of Port Alsworth, Alaska

A magnitude 2.5 earthquake struck 44 km E of Port Alsworth, Alaska on Thu, Sep 16, 2021, 1:14 AM AKDT (09:14 UTC), 175 km (109 mi) below the surface.

A larger quake followed: M4.0 57 km ESE of Pedro Bay, 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: Thu, Sep 16, 2021, 1:14 AM AKDT
UTC: 2021-09-16 09:14:35 UTC
Depth: 175.3 km (108.9 mi), intermediate-depth
Epicenter: 60.244° N, 153.510° 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: 103

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 202 in the 60 days after this one and 150 in the 30 days before it.

After

The first 60 of at least 202.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021bwhmv2e (also filed as us7000fbrc). Read Tue, Sep 29, 2026, 8:55 PM UTC.