Alaska earthquakes

M3.3 earthquake 289 km SE of Chiniak, Alaska

A magnitude 3.3 earthquake struck 289 km SE of Chiniak, Alaska on Sun, Sep 26, 2021, 8:11 PM AKDT (04:11 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.9 236 km SE of Chiniak, Alaska. This one was a foreshock.

Map

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

Open the live map with earthquakes

The earthquake

Magnitude: 3.3 (ml), minor
Local time: Sun, Sep 26, 2021, 8:11 PM AKDT
UTC: 2021-09-27 04:11:42 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 55.679° N, 149.123° 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 7.2 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.06
Depth from: Operator assigned
Station coverage gap: 257°, poorly surrounded by stations
Stations used: 41

Nearby

Within 100 km, magnitude 1.5 and up: 20 in the 60 days after this one and 15 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000feri (also filed as ak021celjvx5). Read Thu, Sep 24, 2026, 8:38 AM UTC.