Alaska earthquakes

M2.7 earthquake 37 km N of Atka, Alaska

A magnitude 2.7 earthquake struck 37 km N of Atka, Alaska on Fri, Jul 23, 2021, 12:34 AM HADT (09:34 UTC), 202 km (125 mi) below the surface.

A larger quake followed: M4.7 67 km ESE of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude
2.7 (ml), micro
Local time
UTC
2021-07-23 09:34:23 UTC
Depth
201.9 km (125.5 mi), intermediate-depth
Epicenter
52.533° N, 174.287° 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
33

Nearby

Within 100 km, magnitude 1.5 and up: 81 in the 60 days after this one and 38 in the 30 days before it.

After

The first 60 of 81.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0219dj71dh. Read Mon, Sep 28, 2026, 1:14 AM UTC.