Alaska earthquakes

M2.3 earthquake 216 km W of Adak, Alaska

A magnitude 2.3 earthquake struck 216 km W of Adak, Alaska on Fri, Dec 23, 2016, 10:21 AM HAST (20:21 UTC), 47 km (29 mi) below the surface.

A larger quake followed: M5.1 222 km WSW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.3 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Fri, Dec 23, 2016, 10:21 AM HAST
UTC: 2016-12-23 20:21:48 UTC
Depth: 46.8 km (29.1 mi), shallow
Epicenter: 51.862° N, 179.772° 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: 11

Nearby

Within 100 km, magnitude 1.5 and up: 44 in the 60 days after this one and 32 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 ak016ggefion (also filed as ak14807539). Read Sun, Oct 4, 2026, 11:31 PM UTC.