Alaska earthquakes

M2.8 earthquake 256 km ESE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 256 km ESE of Chiniak, Alaska on Thu, Mar 15, 2018, 1:54 PM AKDT (21:54 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: Thu, Mar 15, 2018, 1:54 PM AKDT
UTC: 2018-03-15 21:54:39 UTC
Depth: 22.3 km (13.9 mi), shallow
Epicenter: 56.420° N, 148.657° 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 9.2 km horizontally, 10.9 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 217°, poorly surrounded by stations
Stations used: 49

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 201 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 201.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000d7an (also filed as ak0183eqlg7q, ak18723779). Read Thu, Sep 24, 2026, 12:43 PM UTC.