Alaska earthquakes

M2.8 earthquake 231 km SE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 231 km SE of Chiniak, Alaska on Sat, Jan 27, 2018, 8:40 PM AKST (05:40 UTC), 20 km (12 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, Jan 27, 2018, 8:40 PM AKST
UTC: 2018-01-28 05:40:28 UTC
Depth: 19.9 km (12.4 mi), shallow
Epicenter: 56.255° N, 149.399° 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 6.2 km horizontally, 8.6 km in depth
Magnitude uncertainty: ±0.08
Depth from: From location
Station coverage gap: 222°, poorly surrounded by stations
Stations used: 25

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 us1000ch7m (also filed as ak18360102, ak0181ae9iwu). Read Mon, Sep 28, 2026, 4:19 PM UTC.