Alaska earthquakes

M2.1 earthquake 29 km NNW of Atka, Alaska

A magnitude 2.1 earthquake struck 29 km NNW of Atka, Alaska on Tue, Jul 27, 2021, 3:27 AM HADT (12:27 UTC), 185 km (115 mi) below the surface.

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

More in Alaska

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
2.1 (ml), micro
Local time
UTC
2021-07-27 12:27:50 UTC
Depth
185.2 km (115.1 mi), intermediate-depth
Epicenter
52.448° N, 174.354° 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
31

Nearby

Within 100 km, magnitude 1.5 and up: 85 in the 60 days after this one and 53 in the 30 days before it.

After

The first 60 of 85.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0219k73esl. Read Mon, Sep 28, 2026, 5:18 AM UTC.