Alaska earthquakes

M2.8 earthquake 252 km W of Adak, Alaska

A magnitude 2.8 earthquake struck 252 km W of Adak, Alaska on Wed, Jun 28, 2023, 10:00 PM GMT+12 (10:00 UTC), 196 km (122 mi) below the surface.

A larger quake followed: M4.9 Rat Islands, Aleutian Islands, Alaska. This one was a foreshock.

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

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The earthquake

Magnitude: 2.8 (ml), micro
Local time: Wed, Jun 28, 2023, 10:00 PM GMT+12
UTC: 2023-06-28 10:00:38 UTC
Depth: 196.1 km (121.9 mi), intermediate-depth
Epicenter: 51.912° N, 179.700° 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 23.6 km horizontally, 11.2 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 170°
Stations used: 18

Nearby

Within 100 km, magnitude 1.5 and up: 191 in the 60 days after this one and 77 in the 30 days before it.

After

The first 60 of 191.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000kpc8 (also filed as ak0238875jdd). Read Wed, Sep 30, 2026, 7:26 PM UTC.