Alaska earthquakes

M2.5 earthquake 230 km WSW of Adak, Alaska

A magnitude 2.5 earthquake struck 230 km WSW of Adak, Alaska on Tue, Aug 18, 2026, 8:59 AM HADT (17:59 UTC), 24 km (15 mi) below the surface.

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

Map

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

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The earthquake

Magnitude: 2.5 (ml), micro
Local time: Tue, Aug 18, 2026, 8:59 AM HADT
UTC: 2026-08-18 17:59:02 UTC
Depth: 23.9 km (14.9 mi), shallow
Epicenter: 51.142° N, 179.733° 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 4.8 km horizontally, 8.9 km in depth
Magnitude uncertainty: ±0.09
Depth from: From location
Station coverage gap: 222°, poorly surrounded by stations
Stations used: 17

Nearby

Within 100 km, magnitude 1.5 and up: 122 since this one and 75 in the 30 days before it.

After

The first 60 of 122.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000tltv (also filed as aka2026qiiztv). Read Thu, Oct 1, 2026, 1:38 AM UTC.