Alaska earthquakes

M2.8 earthquake 282 km SE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 282 km SE of Chiniak, Alaska on Tue, Mar 13, 2018, 4:19 AM AKDT (12:19 UTC), 7 km (4 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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The earthquake

Magnitude: 2.8 (ml), micro
Local time: Tue, Mar 13, 2018, 4:19 AM AKDT
UTC: 2018-03-13 12:19:50 UTC
Depth: 6.9 km (4.3 mi), shallow
Epicenter: 55.734° N, 149.186° 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 6.9 km horizontally, 8.5 km in depth
Magnitude uncertainty: ±0.08
Depth from: From location
Station coverage gap: 217°, poorly surrounded by stations
Stations used: 30

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 us1000d5i6 (also filed as ak18701236, ak0183b9ydin). Read Mon, Sep 21, 2026, 8:23 PM UTC.