Alaska earthquakes

M3.3 earthquake 230 km SE of Chiniak, Alaska

A magnitude 3.3 earthquake struck 230 km SE of Chiniak, Alaska on Tue, Jan 23, 2018, 6:06 PM AKST (03:06 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M5.3 254 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: 3.3 (ml), minor
Local time: Tue, Jan 23, 2018, 6:06 PM AKST
UTC: 2018-01-24 03:06:06 UTC
Depth: 21.0 km (13.0 mi), shallow
Epicenter: 56.046° N, 149.807° 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 9.2 km horizontally, 11.0 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 213°, poorly surrounded by stations
Stations used: 75

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 us2000cnxz (also filed as ak18191851, ak01813qpxqg). Read Tue, Sep 29, 2026, 2:14 AM UTC.