Alaska earthquakes

M3.4 earthquake 277 km SE of Chiniak, Alaska

A magnitude 3.4 earthquake struck 277 km SE of Chiniak, Alaska on Sat, Feb 3, 2018, 4:12 PM AKST (01:12 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M5.4 252 km ESE 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: 3.4 (ml), minor
Local time: Sat, Feb 3, 2018, 4:12 PM AKST
UTC: 2018-02-04 01:12:49 UTC
Depth: 7.5 km (4.7 mi), shallow
Epicenter: 55.800° N, 149.174° 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 8.8 km horizontally, 8.5 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 231°, poorly surrounded by stations
Stations used: 55

Nearest places

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

Kodiak, AlaskaPopulation 6,253. Forecast296 kmSE

Nearby

Within 100 km, magnitude 1.5 and up: at least 202 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 202.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000d18x (also filed as ak18434981, ak0181lwh9k6). Read Mon, Sep 28, 2026, 4:06 PM UTC.