Alaska earthquakes

M2.9 earthquake 259 km WSW of Adak, Alaska

A magnitude 2.9 earthquake struck 259 km WSW of Adak, Alaska on Fri, Aug 21, 2026, 11:22 PM GMT+12 (11:22 UTC), 22 km (13 mi) below the surface.

A larger quake followed: M4.6 Rat Islands, Aleutian Islands, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 2.9 (ml), micro
Local time: Fri, Aug 21, 2026, 11:22 PM GMT+12
UTC: 2026-08-21 11:22:35 UTC
Depth: 21.5 km (13.4 mi), shallow
Epicenter: 51.333° N, 179.723° 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 2.6 km horizontally, 11.7 km in depth
Magnitude uncertainty: ±0.09
Depth from: From location
Station coverage gap: 203°, poorly surrounded by stations
Stations used: 18

Nearby

Within 100 km, magnitude 1.5 and up: 90 since this one and 73 in the 30 days before it.

After

The first 60 of 90.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000tmn3 (also filed as aka2026qnjvsi). Read Thu, Oct 1, 2026, 12:47 AM UTC.