Alaska earthquakes

M3.7 earthquake 291 km SE of Chiniak, Alaska

A magnitude 3.7 earthquake struck 291 km SE of Chiniak, Alaska on Sun, Mar 25, 2018, 12:14 AM AKDT (08:14 UTC), 7 km (5 mi) below the surface.

A larger quake followed: M5.5 276 km ESE of Chiniak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 3.7 (mb), minor
Local time: Sun, Mar 25, 2018, 12:14 AM AKDT
UTC: 2018-03-25 08:14:13 UTC
Depth: 7.5 km (4.6 mi), shallow
Epicenter: 55.605° N, 149.229° 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 9.3 km horizontally, 7.4 km in depth
Magnitude uncertainty: ±0.36
Depth from: From location
Station coverage gap: 187°, poorly surrounded by stations
Stations used: 130

Nearby

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 201.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000d8u3 (also filed as ak0183v1znun, ak18759968). Read Wed, Sep 30, 2026, 11:13 AM UTC.