Alaska earthquakes

M3.1 earthquake 162 km WSW of Adak, Alaska

A magnitude 3.1 earthquake struck 162 km WSW of Adak, Alaska on Fri, Aug 28, 2026, 9:59 AM HADT (18:59 UTC), 33 km (20 mi) below the surface.

A larger quake followed: M5.3 151 km WSW of Adak, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 3.1 (ml), minor
Local time: Fri, Aug 28, 2026, 9:59 AM HADT
UTC: 2026-08-28 18:59:09 UTC
Depth: 32.9 km (20.5 mi), shallow
Epicenter: 51.422° N, 178.864° 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 4.9 km horizontally, 4.8 km in depth
Magnitude uncertainty: ±0.08
Depth from: From location
Station coverage gap: 195°, poorly surrounded by stations
Stations used: 17

Nearby

Within 100 km, magnitude 1.5 and up: 133 since this one and 109 in the 30 days before it.

After

The first 60 of 133.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000tcqa (also filed as aka2026raxfob). Read Wed, Sep 30, 2026, 4:46 AM UTC.