Alaska earthquakes

M1.8 earthquake 85 km SSE of Ugashik, Alaska

A magnitude 1.8 earthquake struck 85 km SSE of Ugashik, Alaska on Tue, Aug 23, 2016, 2:30 AM AKDT (10:30 UTC), 77 km (48 mi) below the surface.

A larger quake followed: M3.5 62 km ESE of Chignik, Alaska. This one was a foreshock.

Naknek 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: Tue, Aug 23, 2016, 2:30 AM AKDT
UTC: 2016-08-23 10:30:55 UTC
Depth: 77.2 km (48.0 mi), intermediate-depth
Epicenter: 56.760° N, 157.111° 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: 9

Nearest places

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

Naknek, AlaskaPopulation 544. Forecast219 kmS

Nearby

Within 100 km, magnitude 1.5 and up: 57 in the 60 days after this one and 36 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak016augysc3 (also filed as ak13914174). Read Sat, Oct 3, 2026, 11:16 PM UTC.