Alaska earthquakes

M1.7 earthquake 150 km W of Adak, Alaska

A magnitude 1.7 earthquake struck 150 km W of Adak, Alaska on Fri, Aug 13, 2021, 11:14 PM HADT (08:14 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M6.1 187 km WSW 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: 1.7 (ml), micro
Local time: Fri, Aug 13, 2021, 11:14 PM HADT
UTC: 2021-08-14 08:14:55 UTC
Depth: 4.0 km (2.5 mi), shallow
Epicenter: 51.791° N, 178.815° 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: 13

Nearby

Within 100 km, magnitude 1.5 and up: 180 in the 60 days after this one and 89 in the 30 days before it.

After

The first 60 of 180.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021adwb0uq (also filed as av91339391). Read Tue, Sep 29, 2026, 4:51 PM UTC.