Alaska earthquakes

M1.8 earthquake 172 km W of Adak, Alaska

A magnitude 1.8 earthquake struck 172 km W of Adak, Alaska on Mon, Jan 18, 2021, 12:34 PM HAST (22:34 UTC), 11 km (7 mi) below the surface.

A larger quake followed: M5.6 209 km WSW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 1.8 (ml), micro
Local time: Mon, Jan 18, 2021, 12:34 PM HAST
UTC: 2021-01-18 22:34:29 UTC
Depth: 11.2 km (7.0 mi), shallow
Epicenter: 51.701° N, 179.120° 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: 21

Nearby

Within 100 km, magnitude 1.5 and up: 120 in the 60 days after this one and 56 in the 30 days before it.

After

The first 60 of 120.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021u4z4sm (also filed as av91176701). Read Mon, Sep 28, 2026, 12:44 AM UTC.