Alaska earthquakes

M2.2 earthquake 113 km SW of Adak, Alaska

A magnitude 2.2 earthquake struck 113 km SW of Adak, Alaska on Thu, Dec 28, 2017, 12:33 AM HAST (10:33 UTC), 25 km (15 mi) below the surface.

A larger quake followed: M5.2 22 km SSW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.2 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Thu, Dec 28, 2017, 12:33 AM HAST
UTC: 2017-12-28 10:33:34 UTC
Depth: 24.7 km (15.3 mi), shallow
Epicenter: 51.280° N, 177.959° 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: 12

Nearby

Within 100 km, magnitude 1.5 and up: at least 200 in the 60 days after this one and 99 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 ak017gmup451 (also filed as ak17891128). Read Thu, Oct 1, 2026, 11:37 PM UTC.