Alaska earthquakes

M2.3 earthquake 43 km ENE of Adak, Alaska

A magnitude 2.3 earthquake struck 43 km ENE of Adak, Alaska on Sun, Mar 20, 2016, 2:34 PM HADT (23:34 UTC), 146 km (90 mi) below the surface.

A larger quake followed: M4.1 101 km ESE 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
UTC
2016-03-20 23:34:08 UTC
Depth
145.6 km (90.5 mi), intermediate-depth
Epicenter
52.067° N, 176.075° 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
10

Nearby

Within 100 km, magnitude 1.5 and up: 122 in the 60 days after this one and 66 in the 30 days before it.

After

The first 60 of 122.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0163oow1g7 (also filed as ak13122232). Read Mon, Oct 5, 2026, 4:08 AM UTC.