Alaska earthquakes

M2.9 earthquake 221 km SE of Chiniak, Alaska

A magnitude 2.9 earthquake struck 221 km SE of Chiniak, Alaska on Mon, Mar 12, 2018, 8:06 PM AKDT (04:06 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M3.2 230 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: 2.9 (ml), micro
Local time: Mon, Mar 12, 2018, 8:06 PM AKDT
UTC: 2018-03-13 04:06:27 UTC
Depth: 20.5 km (12.8 mi), shallow
Epicenter: 56.086° N, 149.953° 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 6.2 km horizontally, 7.2 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 227°, poorly surrounded by stations
Stations used: 58

Nearest places

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

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 us1000d5ht (also filed as ak18701171, ak0183b542if). Read Mon, Sep 21, 2026, 11:39 PM UTC.