Alaska earthquakes

M3.9 earthquake 287 km SE of Chiniak, Alaska

A magnitude 3.9 earthquake struck 287 km SE of Chiniak, Alaska on Tue, Jan 23, 2018, 2:22 AM AKST (11:22 UTC), 9 km (5 mi) below the surface.

A larger quake followed: M5.5 228 km SE of Chiniak, Alaska. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude: 3.9 (mb), minor
Local time: Tue, Jan 23, 2018, 2:22 AM AKST
UTC: 2018-01-23 11:22:56 UTC
Depth: 8.7 km (5.4 mi), shallow
Epicenter: 55.847° N, 148.848° 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 8.1 km horizontally, 6.8 km in depth
Magnitude uncertainty: ±0.30
Depth from: From location
Station coverage gap: 148°
Stations used: 149

Nearby

Within 100 km, magnitude 1.5 and up: at least 200 in the 60 days after this one and 45 in the 30 days before it.

After

The first 60 of at least 200.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000cnb5 (also filed as ak0181281l9o, ak18176156). Read Mon, Sep 28, 2026, 8:17 PM UTC.