Alaska earthquakes

M1.8 earthquake 24 km SE of Unalaska, Alaska

A magnitude 1.8 earthquake struck 24 km SE of Unalaska, Alaska on Mon, Aug 7, 2017, 1:19 PM AKDT (21:19 UTC), 72 km (44 mi) below the surface.

A larger quake followed: M4.3 120 km SSE of Unalaska, Alaska. This one was a foreshock.

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: 1.8 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Mon, Aug 7, 2017, 1:19 PM AKDT
UTC: 2017-08-07 21:19:17 UTC
Depth: 71.5 km (44.4 mi), intermediate-depth
Epicenter: 53.743° N, 166.232° 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.

Stations used: 35

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast25 kmSE

Nearby

Within 100 km, magnitude 1.5 and up: 121 in the 60 days after this one and 54 in the 30 days before it.

After

The first 60 of 121.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak017a2jb7rp (also filed as ak16473832). Read Thu, Oct 1, 2026, 11:22 PM UTC.