Alaska earthquakes

M3.5 earthquake 260 km SE of Chiniak, Alaska

A magnitude 3.5 earthquake struck 260 km SE of Chiniak, Alaska on Thu, Feb 1, 2018, 1:17 PM AKST (22:17 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M5.0 289 km SE of Chiniak, Alaska. This one was a foreshock.

Kodiak forecast More in Alaska

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: Thu, Feb 1, 2018, 1:17 PM AKST
UTC: 2018-02-01 22:17:43 UTC
Depth: 8.2 km (5.1 mi), shallow
Epicenter: 55.778° N, 149.643° 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 7.7 km horizontally, 8.2 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 212°, poorly surrounded by stations
Stations used: 70

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Kodiak, AlaskaPopulation 6,253. Forecast280 kmSE

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 us2000d1uf (also filed as ak0181haedye, ak18280364). Read Tue, Sep 29, 2026, 5:51 AM UTC.