Alaska earthquakes

M3.1 earthquake 227 km SE of Chiniak, Alaska

A magnitude 3.1 earthquake struck 227 km SE of Chiniak, Alaska on Thu, Jan 25, 2018, 8:50 AM AKST (17:50 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M5.3 254 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: Thu, Jan 25, 2018, 8:50 AM AKST
UTC: 2018-01-25 17:50:15 UTC
Depth: 4.5 km (2.8 mi), shallow
Epicenter: 55.970° N, 150.073° 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 10.9 km horizontally, 8.7 km in depth
Magnitude uncertainty: ±0.08
Depth from: From location
Station coverage gap: 246°, poorly surrounded by stations
Stations used: 43

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 us1000ci26 (also filed as ak18387690, ak01815musxm). Read Tue, Sep 29, 2026, 2:04 AM UTC.