Alaska earthquakes

M1.6 earthquake 20 km SW of Adak, Alaska

A magnitude 1.6 earthquake struck 20 km SW of Adak, Alaska on Tue, Feb 16, 2016, 4:22 PM HAST (02:22 UTC), 31 km (19 mi) below the surface.

A larger quake followed: M3.9 Andreanof Islands, Aleutian Islands, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 1.6 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Tue, Feb 16, 2016, 4:22 PM HAST
UTC: 2016-02-17 02:22:12 UTC
Depth: 31.2 km (19.4 mi), shallow
Epicenter: 51.731° N, 176.817° 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: 159 in the 60 days after this one and 55 in the 30 days before it.

After

The first 60 of 159.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak01627f49mg (also filed as ak12885788). Read Sun, Oct 4, 2026, 10:52 PM UTC.