Alaska earthquakes

M2.8 earthquake 223 km SE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 223 km SE of Chiniak, Alaska on Wed, May 9, 2018, 10:21 PM AKDT (06:21 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M4.8 224 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: 2.8 (ml), micro
Local time: Wed, May 9, 2018, 10:21 PM AKDT
UTC: 2018-05-10 06:21:09 UTC
Depth: 20.2 km (12.6 mi), shallow
Epicenter: 56.073° N, 149.921° 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 9.1 km horizontally, 11.3 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 247°, poorly surrounded by stations
Stations used: 47

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 us1000e51k (also filed as ak19531087, ak0185z3k8o4). Read Sat, Sep 26, 2026, 7:35 PM UTC.