Alaska earthquakes

M3.1 earthquake 253 km SE of Chiniak, Alaska

A magnitude 3.1 earthquake struck 253 km SE of Chiniak, Alaska on Sun, Jan 28, 2018, 3:56 AM AKST (12:56 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M5.4 252 km ESE 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: Sun, Jan 28, 2018, 3:56 AM AKST
UTC: 2018-01-28 12:56:16 UTC
Depth: 20.3 km (12.6 mi), shallow
Epicenter: 56.080° N, 149.202° W
Region: Alaska
Felt reports: 1
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was IX, violent shaking.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 8.7 km horizontally, 10.7 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 193°, poorly surrounded by stations
Stations used: 83

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 us1000ch8w (also filed as ak0181aiiyop, ak18218106). Read Mon, Sep 28, 2026, 4:13 PM UTC.