Alaska earthquakes

M2.8 earthquake 15 km WSW of Atka, Alaska

A magnitude 2.8 earthquake struck 15 km WSW of Atka, Alaska on Sat, Aug 20, 2022, 12:50 PM HADT (21:50 UTC), 172 km (107 mi) below the surface.

A larger quake followed: M4.0 81 km NE of Adak, Alaska. This one was a foreshock.

Map

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

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The earthquake

Magnitude: 2.8 (ml), micro
Local time: Sat, Aug 20, 2022, 12:50 PM HADT
UTC: 2022-08-20 21:50:55 UTC
Depth: 171.7 km (106.7 mi), intermediate-depth
Epicenter: 52.138° N, 174.405° 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.

Location uncertainty: About 12.8 km horizontally, 5.2 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 190°, poorly surrounded by stations
Stations used: 16

Nearby

Within 100 km, magnitude 1.5 and up: 111 in the 60 days after this one and 80 in the 30 days before it.

After

The first 60 of 111.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000ipvt (also filed as ak022ao1hggd). Read Wed, Sep 30, 2026, 3:12 AM UTC.