Alaska earthquakes

M3.0 earthquake 235 km SE of Chiniak, Alaska

A magnitude 3.0 earthquake struck 235 km SE of Chiniak, Alaska on Tue, Apr 6, 2021, 10:22 PM AKDT (06:22 UTC), 9 km (5 mi) below the surface.

A larger quake followed: M4.5 226 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: 3.0 (ml), minor
Local time: Tue, Apr 6, 2021, 10:22 PM AKDT
UTC: 2021-04-07 06:22:07 UTC
Depth: 8.8 km (5.4 mi), shallow
Epicenter: 55.997° N, 149.789° 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 9.2 km horizontally, 8.7 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 225°, poorly surrounded by stations
Stations used: 32

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 45 in the 60 days after this one and 19 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000dxld (also filed as ak0214giu2i4). Read Thu, Sep 24, 2026, 11:13 AM UTC.