Alaska earthquakes

M2.3 earthquake 33 km NNW of Adak, Alaska

A magnitude 2.3 earthquake struck 33 km NNW of Adak, Alaska on Mon, Mar 19, 2018, 9:43 PM HADT (06:43 UTC), 176 km (110 mi) below the surface.

A larger quake followed: M3.4 71 km WSW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.3 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Mon, Mar 19, 2018, 9:43 PM HADT
UTC: 2018-03-20 06:43:24 UTC
Depth: 176.4 km (109.6 mi), intermediate-depth
Epicenter: 52.164° N, 176.787° 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: 17

Nearby

Within 100 km, magnitude 1.5 and up: 53 in the 60 days after this one and 49 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0183mraaaq (also filed as ak18808490). Read Thu, Oct 1, 2026, 10:25 PM UTC.