Alaska earthquakes

M2.8 earthquake 233 km SE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 233 km SE of Chiniak, Alaska on Tue, Feb 16, 2021, 11:40 AM AKST (20:40 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M4.1 259 km SE of Chiniak, 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: 2.8 (ml), micro
Local time: Tue, Feb 16, 2021, 11:40 AM AKST
UTC: 2021-02-16 20:40:54 UTC
Depth: 20.6 km (12.8 mi), shallow
Epicenter: 56.313° N, 149.270° 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 10.5 km horizontally, 11.8 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 241°, poorly surrounded by stations
Stations used: 44

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 37 in the 60 days after this one and 13 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000di7p (also filed as ak021262esy1). Read Thu, Sep 24, 2026, 11:12 AM UTC.