Alaska earthquakes

M2.6 earthquake 35 km NE of Adak, Alaska

A magnitude 2.6 earthquake struck 35 km NE of Adak, Alaska on Thu, Apr 22, 2021, 6:50 PM HADT (03:50 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.2 46 km SW of Adak, Alaska. This one was a foreshock.

Map

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

Open the live map with earthquakes

The earthquake

Magnitude: 2.6 (ml), micro
Local time: Thu, Apr 22, 2021, 6:50 PM HADT
UTC: 2021-04-23 03:50:02 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 52.075° N, 176.224° 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 1.8 km horizontally, 1.8 km in depth
Magnitude uncertainty: ±0.12
Depth from: Operator assigned
Station coverage gap: 157°
Stations used: 23

Nearby

Within 100 km, magnitude 1.5 and up: 49 in the 60 days after this one and 78 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000e44t (also filed as av91225371, ak02156xt8k7). Read Thu, Sep 24, 2026, 10:19 AM UTC.