Alaska earthquakes

M3.5 earthquake 223 km SE of Chiniak, Alaska

A magnitude 3.5 earthquake struck 223 km SE of Chiniak, Alaska on Mon, Jan 29, 2018, 7:33 AM AKST (16:33 UTC), 6 km (3 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: 3.5 (ml), minor
Local time: Mon, Jan 29, 2018, 7:33 AM AKST
UTC: 2018-01-29 16:33:10 UTC
Depth: 5.6 km (3.5 mi), shallow
Epicenter: 55.992° N, 150.127° 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 8.6 km horizontally, 8.7 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 249°, poorly surrounded by stations
Stations used: 75

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 us1000chyy (also filed as ak18231009, ak0181c8b3se). Read Mon, Sep 28, 2026, 11:52 PM UTC.