Alaska earthquakes

M3.4 earthquake 279 km SE of Chiniak, Alaska

A magnitude 3.4 earthquake struck 279 km SE of Chiniak, Alaska on Mon, Apr 23, 2018, 12:16 PM AKDT (20:16 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M3.5 Gulf of 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: Mon, Apr 23, 2018, 12:16 PM AKDT
UTC: 2018-04-23 20:16:12 UTC
Depth: 8.1 km (5.0 mi), shallow
Epicenter: 55.707° N, 149.312° 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 8.7 km horizontally, 8.3 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 204°, poorly surrounded by stations
Stations used: 80

Nearest places

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

Kodiak, AlaskaPopulation 6,253. Forecast299 kmSE

Nearby

Within 100 km, magnitude 1.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000dsg6 (also filed as ak19274594, ak018577qclw). Read Tue, Sep 22, 2026, 8:35 PM UTC.