Alaska earthquakes

M2.5 earthquake 166 km S of False Pass, Alaska

A magnitude 2.5 earthquake struck 166 km S of False Pass, Alaska on Fri, Apr 20, 2018, 3:17 AM AKDT (11:17 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M5.5 160 km ESE of Akutan, 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: 2.5 (ml), micro
Local time: Fri, Apr 20, 2018, 3:17 AM AKDT
UTC: 2018-04-20 11:17:58 UTC
Depth: 16.0 km (9.9 mi), shallow
Epicenter: 53.363° N, 163.566° 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 6.9 km horizontally, 14.1 km in depth
Depth from: From location
Station coverage gap: 243°, poorly surrounded by stations
Stations used: 25

Nearest places

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

Akutan, AlaskaPopulation 1,040. Forecast169 kmESE

Nearby

Within 100 km, magnitude 1.5 and up: 144 in the 60 days after this one and 63 in the 30 days before it.

After

The first 60 of 144.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000dra8 (also filed as ak19263848, ak018523rsxk). Read Wed, Sep 30, 2026, 10:19 PM UTC.