Alaska earthquakes

M2.8 earthquake 238 km SE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 238 km SE of Chiniak, Alaska on Tue, Mar 13, 2018, 2:56 PM AKDT (22:56 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M5.5 276 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: 2.8 (ml), micro
Local time: Tue, Mar 13, 2018, 2:56 PM AKDT
UTC: 2018-03-13 22:56:31 UTC
Depth: 21.8 km (13.5 mi), shallow
Epicenter: 56.111° N, 149.488° 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 8.4 km horizontally, 10.9 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 218°, poorly surrounded by stations
Stations used: 39

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 us1000d5ir (also filed as ak18694655, ak0183bg4lnp). Read Thu, Sep 24, 2026, 11:00 AM UTC.