Alaska earthquakes

M1.6 earthquake 57 km WSW of Adak, Alaska

A magnitude 1.6 earthquake struck 57 km WSW of Adak, Alaska on Thu, Mar 15, 2018, 10:39 AM HADT (19:39 UTC), 23 km (14 mi) below the surface.

A larger quake followed: M4.2 81 km SW of Adak, 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: Thu, Mar 15, 2018, 10:39 AM HADT
UTC: 2018-03-15 19:39:00 UTC
Depth: 23.0 km (14.3 mi), shallow
Epicenter: 51.630° N, 177.372° 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: 16

Nearby

Within 100 km, magnitude 1.5 and up: 120 in the 60 days after this one and 97 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 ak0183epba0q (also filed as ak18723765). Read Fri, Oct 2, 2026, 12:05 AM UTC.