Alaska earthquakes

M3.1 earthquake 20 km NNW of Karluk, Alaska

A magnitude 3.1 earthquake struck 20 km NNW of Karluk, Alaska on Tue, Aug 9, 2016, 3:43 AM AKDT (11:43 UTC), 57 km (36 mi) below the surface.

A larger quake followed: M3.3 50 km N of Larsen Bay, Alaska. This one was a foreshock.

Womens Bay 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: 3.1 (ML, local (Richter)), minor
Magnitude from: Alaska Earthquake Center
Local time: Tue, Aug 9, 2016, 3:43 AM AKDT
UTC: 2016-08-09 11:43:31 UTC
Depth: 57.3 km (35.6 mi), shallow
Epicenter: 57.743° N, 154.579° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
3.1	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.1	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · 119 stations

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: 118

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 99 in the 60 days after this one and 52 in the 30 days before it.

After

The first 60 of 99.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak016a7c43jf (also filed as ak13838128, us10006cal). Read Sun, Oct 4, 2026, 2:41 PM UTC.