Alaska earthquakes

M1.9 earthquake 88 km WSW of Adak, Alaska

A magnitude 1.9 earthquake struck 88 km WSW of Adak, Alaska on Tue, Feb 20, 2018, 12:20 PM HAST (22:20 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M4.6 111 km SW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 1.9 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Tue, Feb 20, 2018, 12:20 PM HAST
UTC: 2018-02-20 22:20:38 UTC
Depth: 13.1 km (8.1 mi), shallow
Epicenter: 51.495° N, 177.759° 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: 153 in the 60 days after this one and 117 in the 30 days before it.

After

The first 60 of 153.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0182cpmlrt (also filed as ak18572050). Read Fri, Oct 2, 2026, 12:42 AM UTC.