Alaska earthquakes

M3.2 earthquake 86 km NE of Atka, Alaska

A magnitude 3.2 earthquake struck 86 km NE of Atka, Alaska on Sun, Dec 11, 2016, 7:40 PM HAST (05:40 UTC), 131 km (81 mi) below the surface.

A larger quake followed: M3.8 59 km E of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 3.2 (mb, body-wave), minor
Magnitude from: USGS National Earthquake Information Center
Local time: Sun, Dec 11, 2016, 7:40 PM HAST
UTC: 2016-12-12 05:40:31 UTC
Depth: 130.5 km (81.1 mi), intermediate-depth
Epicenter: 52.651° N, 173.166° 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
3.2	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.278 · 3 stations
2.8	ML, local (Richter)	Alaska Earthquake Center	Preliminary

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 8.2 km horizontally, 9.8 km in depth
Magnitude uncertainty: ±0.28
Stations used: 12

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 7 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 us200080v6 (also filed as ak14729565, ak016fxyp8fi). Read Sat, Oct 3, 2026, 8:11 AM UTC.