Alaska earthquakes

M3.0 earthquake 228 km SE of Chiniak, Alaska

A magnitude 3.0 earthquake struck 228 km SE of Chiniak, Alaska on Mon, Sep 6, 2021, 10:04 PM AKDT (06:04 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.2 Gulf of 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: 3.0 (ml), minor
Local time: Mon, Sep 6, 2021, 10:04 PM AKDT
UTC: 2021-09-07 06:04:11 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.017° N, 149.926° 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.

Location uncertainty: About 8.9 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.06
Depth from: Operator assigned
Station coverage gap: 214°, poorly surrounded by stations
Stations used: 47

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 23 in the 60 days after this one and 14 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000f8sb (also filed as ak021bhjy8su). Read Wed, Sep 23, 2026, 11:12 PM UTC.