Alaska earthquakes

M2.8 earthquake 233 km SE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 233 km SE of Chiniak, Alaska on Sat, Mar 10, 2018, 4:14 PM AKST (01:14 UTC), 20 km (13 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: Sat, Mar 10, 2018, 4:14 PM AKST
UTC: 2018-03-11 01:14:31 UTC
Depth: 20.5 km (12.7 mi), shallow
Epicenter: 56.221° N, 149.414° 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 9.4 km horizontally, 10.9 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 235°, poorly surrounded by stations
Stations used: 79

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 us1000d533 (also filed as ak18670563, ak01837sastj). Read Sun, Sep 27, 2026, 2:44 PM UTC.