Alaska earthquakes

M2.4 earthquake 69 km WNW of Atka, Alaska

A magnitude 2.4 earthquake struck 69 km WNW of Atka, Alaska on Fri, Oct 22, 2021, 7:00 PM HADT (04:00 UTC), 120 km (74 mi) below the surface.

A larger quake followed: M3.5 63 km ESE of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
2.4 (ml), micro
Local time
UTC
2021-10-23 04:00:13 UTC
Depth
119.6 km (74.3 mi), intermediate-depth
Epicenter
52.384° N, 175.169° 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
13

Nearby

Within 100 km, magnitude 1.5 and up: 72 in the 60 days after this one and 24 in the 30 days before it.

After

The first 60 of 72.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021dll7stm. Read Thu, Sep 24, 2026, 6:55 AM UTC.