Alaska earthquakes

M3.9 earthquake 149 km S of False Pass, Alaska

A magnitude 3.9 earthquake struck 149 km S of False Pass, Alaska on Tue, Mar 6, 2018, 11:07 AM AKST (20:07 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.6 167 km S of False Pass, Alaska. This one was a foreshock.

Akutan forecast More in Alaska

Map

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

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The earthquake

Magnitude: 3.9 (mb), minor
Local time: Tue, Mar 6, 2018, 11:07 AM AKST
UTC: 2018-03-06 20:07:37 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 53.514° N, 163.557° 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 3.3 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.26
Depth from: Operator assigned
Station coverage gap: 210°, poorly surrounded by stations
Stations used: 78

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Akutan, AlaskaPopulation 1,040. Forecast161 kmESE

Nearby

Within 100 km, magnitude 1.5 and up: 109 in the 60 days after this one and 21 in the 30 days before it.

After

The first 60 of 109.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000ddae (also filed as ak0182ztvtd0, ak18604244). Read Wed, Sep 30, 2026, 11:43 PM UTC.