Alaska earthquakes

M4.6 earthquake 170 km S of False Pass, Alaska

A magnitude 4.6 earthquake struck 170 km S of False Pass, Alaska on Thu, Apr 19, 2018, 6:37 AM AKDT (14:37 UTC), 20 km (12 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: 4.6 (mb), light
Local time: Thu, Apr 19, 2018, 6:37 AM AKDT
UTC: 2018-04-19 14:37:06 UTC
Depth: 20.0 km (12.4 mi), shallow
Epicenter: 53.320° N, 163.497° 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 5.7 km horizontally, 6.5 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 172°
Stations used: 114

Nearest places

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

Akutan, AlaskaPopulation 1,040. Forecast175 kmESE

Nearby

Within 100 km, magnitude 1.6 and up: 146 in the 60 days after this one and 43 in the 30 days before it.

After

The first 60 of 146.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000dnn4 (also filed as ak19243846, ak01850i4udc, iscgem611886182). Read Wed, Sep 30, 2026, 11:48 PM UTC.