Alaska earthquakes

M1.7 earthquake 34 km NE of Adak, Alaska

A magnitude 1.7 earthquake struck 34 km NE of Adak, Alaska on Thu, Apr 15, 2021, 7:29 PM HADT (04:29 UTC), 129 km (80 mi) below the surface.

A larger quake followed: M4.2 46 km SW of Adak, 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
1.7 (ml), micro
Local time
UTC
2021-04-16 04:29:54 UTC
Depth
129.2 km (80.3 mi), intermediate-depth
Epicenter
52.058° N, 176.233° 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
14

Nearby

Within 100 km, magnitude 1.5 and up: 79 in the 60 days after this one and 59 in the 30 days before it.

After

The first 60 of 79.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0214vdiupy. Read Wed, Sep 30, 2026, 12:21 AM UTC.