Alaska earthquakes

M4.2 earthquake 233 km SSE of Chiniak, Alaska

A magnitude 4.2 earthquake struck 233 km SSE of Chiniak, Alaska on Wed, Jan 24, 2018, 1:30 AM AKST (10:30 UTC), 5 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: 4.2 (mb), light
Local time: Wed, Jan 24, 2018, 1:30 AM AKST
UTC: 2018-01-24 10:30:12 UTC
Depth: 4.6 km (2.9 mi), shallow
Epicenter: 55.866° N, 150.166° 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 7.9 km horizontally, 6.8 km in depth
Magnitude uncertainty: ±0.23
Depth from: From location
Station coverage gap: 156°
Stations used: 112

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

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000cnnh (also filed as ak01813v14rg, ak18192333). Read Tue, Sep 29, 2026, 6:56 AM UTC.