Alaska earthquakes

M2.7 earthquake 181 km SE of Chiniak, Alaska

A magnitude 2.7 earthquake struck 181 km SE of Chiniak, Alaska on Mon, Mar 12, 2018, 7:55 PM AKDT (03:55 UTC), 21 km (13 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: 2.7 (ml), micro
Local time: Mon, Mar 12, 2018, 7:55 PM AKDT
UTC: 2018-03-13 03:55:10 UTC
Depth: 21.0 km (13.0 mi), shallow
Epicenter: 56.446° N, 150.194° 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 5.7 km horizontally, 13.4 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 233°, poorly surrounded by stations
Stations used: 37

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 us1000d5hq (also filed as ak18701167, ak0183b4t3al). Read Mon, Sep 28, 2026, 8:36 PM UTC.