Alaska earthquakes

M2.0 earthquake 87 km ESE of Adak, Alaska

A magnitude 2.0 earthquake struck 87 km ESE of Adak, Alaska on Tue, Mar 16, 2021, 9:39 AM HADT (18:39 UTC), 36 km (22 mi) below the surface.

A larger quake followed: M4.7 37 km SSW of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude
2.0 (ml), micro
Local time
UTC
2021-03-16 18:39:07 UTC
Depth
36.0 km (22.4 mi), shallow
Epicenter
51.581° N, 175.455° 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
25

Nearby

Within 100 km, magnitude 1.5 and up: 135 in the 60 days after this one and 62 in the 30 days before it.

After

The first 60 of 135.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0213gc97e7. Read Thu, Sep 24, 2026, 11:14 AM UTC.