Alaska earthquakes

M3.3 earthquake 223 km SE of Chiniak, Alaska

A magnitude 3.3 earthquake struck 223 km SE of Chiniak, Alaska on Tue, Feb 13, 2018, 8:39 PM AKST (05:39 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M5.2 228 km SE 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: 3.3 (ml), minor
Local time: Tue, Feb 13, 2018, 8:39 PM AKST
UTC: 2018-02-14 05:39:03 UTC
Depth: 5.4 km (3.4 mi), shallow
Epicenter: 55.983° N, 150.134° 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 4.4 km horizontally, 7.9 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 200°, poorly surrounded by stations
Stations used: 45

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 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 us2000d6k2 (also filed as ak18435883, ak01822ie5t8). Read Mon, Sep 28, 2026, 11:29 PM UTC.