Alaska earthquakes

M3.1 earthquake 213 km SE of Chiniak, Alaska

A magnitude 3.1 earthquake struck 213 km SE of Chiniak, Alaska on Sat, Jan 27, 2018, 10:30 PM AKST (07:30 UTC), 26 km (16 mi) below the surface.

A larger quake followed: M5.1 233 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: 3.1 (ml), minor
Local time: Sat, Jan 27, 2018, 10:30 PM AKST
UTC: 2018-01-28 07:30:02 UTC
Depth: 26.4 km (16.4 mi), shallow
Epicenter: 56.092° N, 150.140° 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 12.7 km horizontally, 18.7 km in depth
Magnitude uncertainty: ±0.09
Depth from: From location
Station coverage gap: 248°, poorly surrounded by stations
Stations used: 24

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 201.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000ch7t (also filed as ak18360118, ak0181afe6m6). Read Mon, Sep 28, 2026, 2:09 PM UTC.