Alaska earthquakes

M1.9 earthquake 69 km S of Adak, Alaska

A magnitude 1.9 earthquake struck 69 km S of Adak, Alaska on Mon, Mar 20, 2017, 4:18 PM HADT (01:18 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M5.9 95 km SSW 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: Mon, Mar 20, 2017, 4:18 PM HADT
UTC: 2017-03-21 01:18:12 UTC
Depth: 21.0 km (13.0 mi), shallow
Epicenter: 51.246° N, 176.627° 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: 14

Nearby

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and 52 in the 30 days before it.

After

The first 60 of at least 201.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0173obp2xt (also filed as ak15643864). Read Fri, Oct 2, 2026, 11:22 PM UTC.