Alaska earthquakes

M3.4 earthquake 64 km WSW of Nanwalek, Alaska

A magnitude 3.4 earthquake struck 64 km WSW of Nanwalek, Alaska on Sat, Dec 11, 2021, 9:46 AM AKST (18:46 UTC), 81 km (50 mi) below the surface.

A larger quake followed: M4.6 71 km NNE of Aleneva, Alaska. This one was a foreshock.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 3.4 (ML, local (Richter)), minor
Magnitude from: Alaska Earthquake Center
Local time: Sat, Dec 11, 2021, 9:46 AM AKST
UTC: 2021-12-11 18:46:29 UTC
Depth: 80.6 km (50.1 mi), intermediate-depth
Epicenter: 59.077° N, 152.909° 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
3.4	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.6	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.03 · 146 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: 202

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 202 in the 60 days after this one and 177 in the 30 days before it.

After

The first 60 of at least 202.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021fuvegcy (also filed as us6000gbgk). Read Thu, Oct 1, 2026, 10:52 PM UTC.