Alaska earthquakes

M4.6 earthquake 135 km S of Unalaska, Alaska

A magnitude 4.6 earthquake struck 135 km S of Unalaska, Alaska on Sun, Jul 8, 2018, 7:16 PM AKDT (03:16 UTC), 32 km (20 mi) below the surface.

Unalaska 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: Sun, Jul 8, 2018, 7:16 PM AKDT
UTC: 2018-07-09 03:16:13 UTC
Depth: 32.1 km (19.9 mi), shallow
Epicenter: 52.656° N, 166.482° 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 4.3 km horizontally, 5.3 km in depth
Magnitude uncertainty: ±0.04
Depth from: From location
Station coverage gap: 171°
Stations used: 153

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast135 kmS

Nearby

Within 100 km, magnitude 1.6 and up: 54 in the 60 days after this one and 21 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000g01l (also filed as ak19851524, ak0188q9zoxo, iscgem616641233). Read Wed, Sep 30, 2026, 6:26 PM UTC.