Alaska earthquakes

M1.7 earthquake 155 km W of Adak, Alaska

A magnitude 1.7 earthquake struck 155 km W of Adak, Alaska on Tue, Aug 11, 2026, 11:34 AM HADT (20:34 UTC), 4 km (2 mi) below the surface.

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

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The earthquake

Magnitude
1.7 (ML, local (Richter)), micro
Magnitude from
AV
Local time
UTC
2026-08-11 20:34:50 UTC
Depth
3.7 km (2.3 mi), shallow
Epicenter
51.792° N, 178.882° 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 0.4 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.26
Depth from
From location
Station coverage gap
287°, poorly surrounded by stations
Stations used
6

Nearby

Within 100 km, magnitude 1.5 and up: 178 since this one and 100 in the 30 days before it.

After

The first 60 of 178.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event av94377458. Read Sat, Oct 3, 2026, 1:56 AM UTC.