Alaska earthquakes

M3.7 earthquake 235 km SE of Chiniak, Alaska

A magnitude 3.7 earthquake struck 235 km SE of Chiniak, Alaska on Tue, Jan 23, 2018, 6:03 AM AKST (15:03 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.5 256 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: 3.7 (ml), minor
Local time: Tue, Jan 23, 2018, 6:03 AM AKST
UTC: 2018-01-23 15:03:47 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.156° N, 149.477° 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 11.1 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.06
Depth from: Operator assigned
Station coverage gap: 229°, poorly surrounded by stations
Stations used: 36

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 200 in the 60 days after this one and 116 in the 30 days before it.

After

The first 60 of at least 200.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000cees (also filed as ak01812ab8ao). Read Tue, Sep 29, 2026, 1:00 AM UTC.