Alaska earthquakes

M3.5 earthquake 256 km ESE of Chiniak, Alaska

A magnitude 3.5 earthquake struck 256 km ESE of Chiniak, Alaska on Tue, Jan 23, 2018, 8:41 PM AKST (05:41 UTC), 22 km (14 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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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: Tue, Jan 23, 2018, 8:41 PM AKST
UTC: 2018-01-24 05:41:08 UTC
Depth: 22.1 km (13.8 mi), shallow
Epicenter: 56.511° N, 148.576° 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 7.6 km horizontally, 10.1 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 179°
Stations used: 74

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 us1000cejj (also filed as ak18192152, ak01813s4b70). Read Mon, Sep 28, 2026, 4:28 PM UTC.