Alaska earthquakes

M2.3 earthquake 99 km SW of Adak, Alaska

A magnitude 2.3 earthquake struck 99 km SW of Adak, Alaska on Thu, Aug 16, 2018, 9:32 AM HADT (18:32 UTC), 45 km (28 mi) below the surface.

A larger quake followed: M6.3 97 km SW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.3 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Thu, Aug 16, 2018, 9:32 AM HADT
UTC: 2018-08-16 18:32:44 UTC
Depth: 45.0 km (28.0 mi), shallow
Epicenter: 51.276° N, 177.708° 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.

Stations used: 22

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 199.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak018ahdfvt3 (also filed as ak20106790). Read Thu, Oct 1, 2026, 10:05 PM UTC.