Alaska earthquakes

M3.0 earthquake 223 km SE of Chiniak, Alaska

A magnitude 3.0 earthquake struck 223 km SE of Chiniak, Alaska on Mon, Feb 12, 2018, 12:57 PM AKST (21:57 UTC), 19 km (12 mi) below the surface.

A larger quake followed: M5.4 252 km ESE 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: 3.0 (ml), minor
Local time: Mon, Feb 12, 2018, 12:57 PM AKST
UTC: 2018-02-12 21:57:55 UTC
Depth: 19.0 km (11.8 mi), shallow
Epicenter: 56.093° N, 149.881° 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 7.0 km horizontally, 9.4 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 232°, poorly surrounded by stations
Stations used: 60

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 us2000d7a1 (also filed as ak0181zgydbf, ak18506383). Read Mon, Sep 28, 2026, 4:08 PM UTC.