Alaska earthquakes

M3.8 earthquake 229 km SE of Chiniak, Alaska

A magnitude 3.8 earthquake struck 229 km SE of Chiniak, Alaska on Wed, Jan 24, 2018, 11:18 PM AKST (08:18 UTC), 30 km (19 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: 3.8 (ml), minor
Local time: Wed, Jan 24, 2018, 11:18 PM AKST
UTC: 2018-01-25 08:18:03 UTC
Depth: 30.4 km (18.9 mi), shallow
Epicenter: 56.396° N, 149.231° 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 8.2 km horizontally, 10.1 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 189°, poorly surrounded by stations
Stations used: 119

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 us2000cp72 (also filed as ak01815hb0je, ak18194225). Read Mon, Sep 28, 2026, 4:22 PM UTC.