Alaska earthquakes

M3.0 earthquake 44 km SSW of Adak, Alaska

A magnitude 3.0 earthquake struck 44 km SSW of Adak, Alaska on Wed, Jul 28, 2021, 5:06 PM HADT (02:06 UTC), 70 km (44 mi) below the surface.

A larger quake followed: M3.5 63 km SE of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 3.0 (ml), minor
Local time: Wed, Jul 28, 2021, 5:06 PM HADT
UTC: 2021-07-29 02:06:38 UTC
Depth: 70.1 km (43.5 mi), intermediate-depth
Epicenter: 51.514° N, 176.909° 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 7.7 km horizontally, 13.1 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 207°, poorly surrounded by stations
Stations used: 39

Nearby

Within 100 km, magnitude 1.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000f78d (also filed as ak0219nc349w). Read Thu, Sep 24, 2026, 9:43 AM UTC.