Alaska earthquakes

M2.1 earthquake 36 km S of Adak, Alaska

A magnitude 2.1 earthquake struck 36 km S of Adak, Alaska on Sat, Mar 10, 2018, 8:39 AM HAST (18:39 UTC), 40 km (25 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: 2.1 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Sat, Mar 10, 2018, 8:39 AM HAST
UTC: 2018-03-10 18:39:21 UTC
Depth: 39.7 km (24.7 mi), shallow
Epicenter: 51.543° N, 176.599° 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: 95 in the 60 days after this one and 59 in the 30 days before it.

After

The first 60 of 95.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak01836f15jd (also filed as ak18696773). Read Thu, Oct 1, 2026, 10:06 PM UTC.