Alaska earthquakes

M2.9 earthquake 66 km SW of Atka, Alaska

A magnitude 2.9 earthquake struck 66 km SW of Atka, Alaska on Sun, Apr 19, 2020, 8:52 PM HADT (05:52 UTC), 72 km (45 mi) below the surface.

A larger quake followed: M4.0 100 km SW 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
2.9 (ml), micro
Local time
UTC
2020-04-20 05:52:37 UTC
Depth
72.1 km (44.8 mi), intermediate-depth
Epicenter
51.839° N, 174.973° 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 7.8 km horizontally, 17.1 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
214°, poorly surrounded by stations
Stations used
23

Nearby

Within 100 km, magnitude 1.5 and up: 130 in the 60 days after this one and 69 in the 30 days before it.

After

The first 60 of 130.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us60009dhx (also filed as av70888054, ak02053nxwzb). Read Wed, Sep 30, 2026, 3:50 AM UTC.