Alaska earthquakes

M2.1 earthquake 127 km WSW of Adak, Alaska

A magnitude 2.1 earthquake struck 127 km WSW of Adak, Alaska on Sat, Dec 23, 2017, 6:37 AM HAST (16:37 UTC), 12 km (7 mi) below the surface.

A larger quake followed: M4.2 209 km W of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.1 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Sat, Dec 23, 2017, 6:37 AM HAST
UTC: 2017-12-23 16:37:25 UTC
Depth: 11.7 km (7.3 mi), shallow
Epicenter: 51.603° N, 178.434° 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: 17

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 95 in the 30 days before it.

After

The first 60 of at least 199.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak017geoltfq (also filed as ak17648673). Read Thu, Oct 1, 2026, 11:42 PM UTC.