Alaska earthquakes

M3.7 earthquake 257 km ESE of Chiniak, Alaska

A magnitude 3.7 earthquake struck 257 km ESE of Chiniak, Alaska on Thu, Jan 25, 2018, 7:03 PM AKST (04:03 UTC), 23 km (14 mi) below the surface.

A larger quake followed: M5.1 233 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: 3.7 (mb), minor
Local time: Thu, Jan 25, 2018, 7:03 PM AKST
UTC: 2018-01-26 04:03:45 UTC
Depth: 23.0 km (14.3 mi), shallow
Epicenter: 56.449° N, 148.610° 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 7.2 km horizontally, 5.8 km in depth
Magnitude uncertainty: ±0.50
Depth from: From location
Station coverage gap: 188°, poorly surrounded by stations
Stations used: 128

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 us2000cpl5 (also filed as ak18196892, ak018172di5n). Read Tue, Sep 29, 2026, 7:38 AM UTC.