Alaska earthquakes

M2.8 earthquake 265 km W of Adak, Alaska

A magnitude 2.8 earthquake struck 265 km W of Adak, Alaska on Fri, Jul 30, 2021, 12:56 PM GMT+12 (00:56 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.0 204 km W 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: 2.8 (ml), micro
Local time: Fri, Jul 30, 2021, 12:56 PM GMT+12
UTC: 2021-07-30 00:56:02 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 51.613° N, 179.547° E
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 1.7 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.10
Depth from: Operator assigned
Station coverage gap: 121°
Stations used: 25

Nearby

Within 100 km, magnitude 1.5 and up: 146 in the 60 days after this one and 62 in the 30 days before it.

After

The first 60 of 146.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000f53k (also filed as ak0219oyq8jh). Read Fri, Sep 25, 2026, 6:29 PM UTC.