Alaska earthquakes

M2.8 earthquake 240 km SE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 240 km SE of Chiniak, Alaska on Sat, Feb 17, 2018, 9:31 AM AKST (18:31 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M5.4 252 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, Feb 17, 2018, 9:31 AM AKST
UTC: 2018-02-17 18:31:26 UTC
Depth: 21.3 km (13.2 mi), shallow
Epicenter: 56.211° N, 149.271° 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, 11.4 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 227°, poorly surrounded by stations
Stations used: 46

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

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000d89w (also filed as ak18545731, ak01827op616). Read Tue, Sep 29, 2026, 6:45 AM UTC.