Alaska earthquakes

M3.0 earthquake 21 km SSW of Nanwalek, Alaska

A magnitude 3.0 earthquake struck 21 km SSW of Nanwalek, Alaska on Sun, Nov 20, 2016, 10:02 PM AKST (07:02 UTC), 49 km (31 mi) below the surface.

A larger quake followed: M4.2 52 km W of Happy Valley, Alaska. This one was a foreshock.

Homer 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: 3.0 (ML, local (Richter)), minor
Magnitude from: Alaska Earthquake Center
Local time: Sun, Nov 20, 2016, 10:02 PM AKST
UTC: 2016-11-21 07:02:12 UTC
Depth: 49.1 km (30.5 mi), shallow
Epicenter: 59.173° N, 152.036° 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
3.0	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.0	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

What happened

The USGS’s account of the effects of this earthquake.

Felt at Homer.

From the USGS event page for ak016ez9dmlk. U.S. Geological Survey text and figures are in the public domain.

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: 108

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 200 in the 60 days after this one and 170 in the 30 days before it.

After

The first 60 of at least 200.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak016ez9dmlk (also filed as ak14374368, us10007b34). Read Mon, Oct 5, 2026, 1:43 PM UTC.