Alaska earthquakes

M2.0 earthquake 133 km W of Adak, Alaska

A magnitude 2.0 earthquake struck 133 km W of Adak, Alaska on Thu, Sep 23, 2021, 2:46 PM HADT (23:46 UTC), 132 km (82 mi) below the surface.

A larger quake followed: M3.1 121 km WSW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
2.0 (ml), micro
Local time
UTC
2021-09-23 23:46:31 UTC
Depth
132.1 km (82.1 mi), intermediate-depth
Epicenter
52.017° N, 178.556° 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
35

Nearby

Within 100 km, magnitude 1.5 and up: 103 in the 60 days after this one and 55 in the 30 days before it.

After

The first 60 of 103.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021c8ax7o1. Read Thu, Sep 24, 2026, 8:59 AM UTC.