Alaska earthquakes

M3.2 earthquake 228 km SE of Chiniak, Alaska

A magnitude 3.2 earthquake struck 228 km SE of Chiniak, Alaska on Tue, Oct 27, 2020, 2:50 AM AKDT (10:50 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.7 251 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: 3.2 (ml), minor
Local time: Tue, Oct 27, 2020, 2:50 AM AKDT
UTC: 2020-10-27 10:50:11 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 55.993° N, 149.969° 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 10.3 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.06
Depth from: Operator assigned
Station coverage gap: 206°, 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: 22 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 us7000ccc6 (also filed as ak020dtz0q9a). Read Sat, Sep 26, 2026, 9:38 AM UTC.